3 *---------------------------------------------------------------------
4 * v1.42 Released 7/12/2011
6 * 1. radar_to_uf.c (RSL_radar_to_uf_fp): Changed scale_factor used for storing
7 * differential phase (PH) in UF from 100 to 10. The usual scale factor
8 * of 100 caused values over 327.67 to become negative when converted to
10 *---------------------------------------------------------------------
11 * v1.41 Released 6/22/2011
13 * 1. wsr88d_m31.c: Simplified the WSR-88D ray structure and supporting code.
14 * Added support for dual-polarization data fields.
15 * Thanks go to Andy Spencer for code contributions.
16 * wsr88d_to_radar.c, wsr88d_m31.c: Renamed load_wsr88d_m31_into_radar to
17 * wsr88d_load_m31_into_radar, to be consistent with naming convention.
18 * 2. Added support for Sigmet 2-byte data types, as well as HydroClass 1 and 2
19 * byte types. Files involved: nsig_to_radar.c, nsig.c, nsig.h, volume.c.
20 * Modified nsig_to_radar.c and rsl.h to handle Sigmet dual PRF.
21 * Thanks to Fabio Sato and Cesar Beneti for the dual PRF code.
22 * 3. Completed DORADE ingest. Files involved: dorade_to_radar.c, dorade.c,
24 * 4. rsl.h, radar.c, radar_to_uf.c, uf_to_radar.c, volume.c: modified for RHI.
25 * nsig_to_radar.c: Thanks go to Scott Collis for a bug fix involving RHI.
26 * 5. anyformat_to_radar.c: Thanks to Thiago Biscaro for fixing a pipe problem
27 * that caused processes to remain open.
28 * 6. gzip.c: Thanks to Dan Sheldon for fix for a file descriptor leak.
29 *---------------------------------------------------------------------
30 * v1.40 Released 10/10/2008
32 * 1. wsr88d_m31.c (load_wsr88d_m31_into_radar): Corrected a potential problem
33 * in which the end of sweep or volume might occur at a point in the program
34 * that was isolated from the code that handles that condition.
35 * Store vcp in radar header.
36 * 2. rsl.h: Added vcp to radar header structure for WSR-88D.
37 * 3. nsig_to_radar.c: Corrected a problem involving Extended Header, which
38 * when present, caused elevation in ray header to be set to 0.
39 * 4. wsr88d_m31.c (wsr88d_load_ray_into_radar): Changed the way we determine
40 * whether or not to keep the reflectivity field (we don't want it from
41 * Doppler split cuts). The previous method was inadequate for VCP 121.
42 * 5. read_write.c (RSL_write_radar_fp, RSL_write_volume, RSL_write_sweep)
43 * (RSL_write_ray): Initialize header_buf to zero to avoid junk in output
44 * files. This provides clean outputs for comparing in test situations.
45 *---------------------------------------------------------------------
46 * v1.39 Released 07/24/2008
48 * 1. Added wsr88d_m31.c. It contains routines to handle new Message Type 31
49 * in WSR-88D Level II Build 10.
50 * 2. wsr88d_to_radar.c: Modified to call message 31 routine.
51 * 3. wsr88d.c: Added code for VCPs 211, 212, 213.
52 * 4. lassen_to_radar.c: Added a fix for PhiDP provided by Scott Collis of BMRC.
54 *---------------------------------------------------------------------
55 * v1.38 Released 11/29/2007
57 * 1. wsr88d.c (wsr88d_read_sweep): Modified to handle unusual message packets
58 * at start of WSR-88D files from some future GPM sites.
60 *---------------------------------------------------------------------
61 * v1.37 Released 06/19/2007 (Severity: low)
63 * 1. radar_to_uf.c, uf_to_radar.c: Modified to use Local Use Header to store
64 * and retrieve WSR-88D VR azimuth. This is necessary because WSR-88D runs
65 * separate scans for DZ and VR at lower elevations, which means that they
66 * have different azimuths for a given ray. Thanks go to Pat Kennedy of CSU
67 * for discovering this problem and for bringing it to our attention.
68 * 2. lassen_load_sweep in lassen_to_radar.c: Removed 1.4 dB correction for
69 * reflectivity--BMRC version no longer uses it.
71 *---------------------------------------------------------------------
72 * v1.36 Released 08/29/2006 (Severity: low)
74 * 1. Forgot to put the modified wsr88d_locations.dat file into previous
77 *---------------------------------------------------------------------
78 * v1.35 Released 08/28/2006 (Severity: low)
80 * 1. lassen_to_radar.c: fixed a bug in lassen_load_sweep where sweep index
81 * was being used for sweep number in headers.
82 * 2. radar.c: Modified RSL_get_volume to return volume for any field type.
83 * It had been limited to velocity, spectrum width and reflectivity types.
84 * 3. Added SQ_INDEX for Signal Quality Index field. Files modified: rsl.h,
85 * volume.c, nsig_to_radar.c, nsig.h, uf_to_radar.c, radar_to_uf.c.
86 * 4. wsr88d_locations.dat modified to change height units from feet to meters.
87 * Thanks go to Dave Makofski for finding and fixing that one.
89 *---------------------------------------------------------------------
90 * v1.34 Released 02/15/2006 (Severity: low)
92 * 1. wsr88d.c: Fixed a bug in checking msg_type. The problem occurred while
93 * processing data from Houston, which recently switched over to the new
94 * Open RDA (ORDA) being implemented by NEXRAD. Msg_type is in the
95 * righthand byte of a two-byte word, the left containing Channel ID,
96 * but the full two-byte value was being used to check msg_type. This
97 * became a problem when ORDA used a non-zero value for Channel ID.
98 * 2. wsr88d.c and wsr88d_to_radar.c: Added information for new VCPs 12 and
100 * 3. Added Huntsville site to wsr88d_locations.dat.
102 *---------------------------------------------------------------------
103 * v1.33 Began 02/25/2004. Released 08/27/2004 (Severity: low)
105 * 1. Modified wsr88d_to_radar.c and anyformat_to_radar.c to handle change in
106 * WSR-88D header record for Level II Build 5 data format.
107 * 2. Fixed a bug in wsr88d.c, wsr88d_read_sweep, which caused the last ray
108 * of sweep to be deleted along with empty rays in second tilt and above.
110 *---------------------------------------------------------------------
111 * v1.32 Began 11/05/2003. Released 02/13/2004 (Severity: low)
113 * 1. Changed computation of sweep seconds in nsig_to_radar.c to eliminate
115 * 2. wsr88d_to_radar.c: removed call to wsr88d_get_wavelength, which computed
116 * the WSR-88D wavelength when parameters were available, or returned a
117 * constant otherwise. Replaced with constant wavelength of 10 cm. Thanks to
118 * Joe Holmes of SIGMET for noticing differing wavelengths between fields.
119 * 3. Added ingest for Rainbow format. Only handles DZ.
121 *---------------------------------------------------------------------
122 * v1.31 Began 04/30/2003. Released 09/03/2003 (Severity: low)
124 * 1. nsig_to_radar.c: removed unused #define, made some cosmetic changes in
125 * code and comment alignment.
126 * 2. Makefile.am: Added line to install include-directory under target
128 * 3. Added code to configure.in to fix yywrap unresolved reference that
129 * occurred when installing rsl when the TSDIS toolkit was not installed.
131 *---------------------------------------------------------------------
132 * v1.30 Began 07/30/2001. Released 03/13/2003 (Severity: low)
134 * 1. Increased the size of parameter arrays in nsig.c as recommended by
135 * Paul Kucera, to accommodate NPOL polarimetric parameters.
136 * 2. Fixed a bug in nsig_endianess in nsig.c.
137 * 3. Modified uf_to_radar to compute unambiguous range using PRF. Reduced
138 * UF record length by removing extra byte at end of record. Made to handle
139 * 4-digit years (previously assumed 2-digit, as declared in UF documention).
140 * 4. Modified hdf_to_radar to use more accurate value for sweep.h.nrays.
141 * 5. Corrected computation in function wsr88d_get_azimuth_rate in wsr88d.c.
142 * 6. Fixed bug in sweep rate computation in wsr88d.c
143 * 7. Changed wsr88d_ray_to_float in wsr88d.c to use field data pointers
144 * provided in the data, instead of computing offsets. The latter method is
145 * incorrect according to NOAA Radar Operations Center.
146 * 8. Modified radar_to_uf to get fixed angle for mandatory header from value
147 * stored in ray. Previously used average elevation of sweep.
148 * 9. Added examples/adjust_gate_size.c, and added enhanced version of qlook.c
150 *10. Fixed problem in which rsl libraries could not be built if a library
151 * didn't already exist in the target directory. Brought configure.in up to
152 * date with autoconf version 2.53 standards. Removed acconfig.h.
153 *11. Removed outdated email addresses found in comments.
155 *---------------------------------------------------------------------
156 * v1.29 Began 09/19/2000. Released 4/3/2001 (Severity: low)
158 * 1. Modified radar_to_hdf_1.c maskBuild() to build MZ mask differently:
159 * maskBuild was checking where CZ and DZ volumes were equal
160 * to build MZ volume (mask). Now, maskBuild just checks where
161 * CZ volume == BADVAL, for runtime speed, and because the comparison between
162 * CZ and DZ volumes was corrupted by the addition of qcParm[ZCAL] to
163 * each CZ range bin in level_1_qc.c qualityControl(). This change is
164 * compatible with Danny Rosenfeld's algorithm by which CZ range bins
166 * 2. Included Stacy Brodzik's modifications for storing calibration constants
167 * in UF (radar_to_uf.c, uf_to_radar.c).
168 * 3. Corrected version string and units for sweep rate written to UF mandatory
169 * header in radar_to_uf.c, thanks to Joseph Holmes of Sigmet for catching
170 * the inaccuracies. Corrected rounding error in latitude/longitude for UF
171 * mandatory header in same program. Modified assignments of sweep rate
172 * and/or azimuth rate in uf_to_radar.c and hdf_to_radar.c
174 *---------------------------------------------------------------------
175 * v1.28 Began 03/23/2000. Released: 7/24/2000 (Severity: low)
177 * 1. Added 3 functions to volume.c :
178 * RSL_add_dbz_offset_to_volume() , RSL_add_dbz_offset_to_sweep(),
179 * RSL_add_dbz_offset_to_ray()
180 * 2. Modified nsig.h , nsig_to_radar.c , volume.c to handle sigmet's
181 * RhoHV and PhiDP fields.
182 * 3. Modified volume.c to fix problem with subsequent calls to
183 * read_these_sweeps()
184 * 4. Modified uf_to_radar.c to compute unambiguous range for
187 *---------------------------------------------------------------------
189 * v1.27 Began 01/11/2000. Released: 2/17/2000 (Severity: low)
191 * 1. Modified files radar_to_hdf_1.c and radar_to_hdf_2.c
192 * to accomodate random ray lengths, eg, Berrimah data.
194 *----------------------------------------------------------------------
195 * v1.26 Began 12/11/1999. Released: 12/21/1999 (Severity: low)
197 * 1. Configuration change for rapic.l and rapic.y.
198 * 2. Changed dependency for rsl.h and wsr88d.h
200 *----------------------------------------------------------------------
201 * v1.25 Began 11/30/1999. Released: 12/10/1999 (Severity: medium)
203 * 1. Merged branch v1.24.1.
204 * 2. Added configure/configure.in/Makefile.in.
205 * 3. Added Makefile.am (automake) and other related files.
206 * 4. Configuration is a snap:
208 * configure --prefix=/some/dir/to/install
211 *----------------------------------------------------------------------
212 * v1.24.1 Began 8/1/1999. Released: 11/30/1999 (Severity: new features)
214 * 1. Introduced radar->h.project[24] -- project name.
215 * 2. Added dorade ingest -- RSL_dorade_to_radar.
216 * 3. Added examples/kwaj_subtract_one_day.c -- fix KWAJEX dates.
217 * 4. Removed rsl_popen/pclose routines from gzip.c. I found
218 * a way to eliminate the 'Broken pipe' message, the message
219 * reappeared in linux 2.2.* series, by flushing the
220 * stream when looking at the magic numbers in anyformat_to_radar.c.
221 * 5. HDF ROUTINES ARE REMOVED. I have moved them to gvs for level_1.
222 * See gvs/src/gvslib/. That's where they live now. The interface
223 * RSL_hdf_to_radar and RSL_radar_to_hdf remain as hooks. If
224 * you have libgvs, then you can specify -DHAVE_TSDIS_TOOLKIT in
227 *----------------------------------------------------------------------
228 * v1.24 Began 6/25/1999. Released: 6/28/1999 (Severity: bug fix)
230 * 1. UF ingest improperly set the Fixed angle.
231 * 2. Removed max_reasonable_dbz (60) from gts.c. The app must decide
232 * what a max allowable dbz is.
234 *----------------------------------------------------------------------
235 * v1.23 Began 3/31/1999. Released: 4/2/1999 (Severity: upgrade)
237 * 1. Added EDGE format ingest. This requires the library ETOR
238 * which is obtained from Enterprise Electronics.
239 * To build this component, set -DHAVE_EDGE in Makefile.
241 *----------------------------------------------------------------------
242 * v1.22 Began 3/4/1999. Released: 3/4/1999 (Severity: bux fix)
244 * 1. Forgot to set the global 'rsl_kdp_wavelen' in nsig_to_radar.c.
246 *----------------------------------------------------------------------
247 * v1.21 Began 02/16/1999. Released: 3/4/1999 (Severity: minor bux fix)
249 * 1. UF code didn't recognize VE, now it does.
250 * 2. RSL_SPEED_OF_LIGHT unifies c throughout the library.
251 * 3. Modification to KDP processing for Sigmet. New
252 * F and INVF functions.
254 *----------------------------------------------------------------------
255 * v1.20 Began 11/12/98. Released: 01/25/1999 (Severity: bug fix/upgrade)
257 * 1. Fixed RADTEC ingest. Does RHI too, but,
258 * RSL doesn't have any good RHI image routines.
260 * 2. Added: RSL_set_color_table
261 * RSL_get_color_table
263 * 3. Added: '-b x' option to any_to_gif. This makes images black below
264 * x dbz. This is a simple noise filter.
265 *----------------------------------------------------------------------
266 * v1.19 Began 9/15/98. Released: 9/23/98 (Severity: bug fix)
268 * 1. Modified file volume.c . New INV_F, _F routines for diff refl.
270 * 2. Created examples/images to hold a base-line set of images
271 * to compare when running 'run_tests'. Modified run_tests
274 *----------------------------------------------------------------------
275 * v1.18 Began 4/28/98. Released: 8/13/98 (Severity: upgrade)
278 * RSL_radtec_to_radar -- in radtec_to_radar.c
279 * RSL_fix_time -- in volume.c
286 * 3. Modified image generation. Images are produced out to 'range'
287 * specified. Each image pixels is no longer 1km, but radius/range.
289 * 4. any_to_gif can now accept range and image size arguments.
291 * 5. RADTEC requires PKWARE routines explode and crc32.
292 * RADTEC is built into RSL, if you specify -DHAVE_PKWARE in
293 * the Makefile. When using RADTEC, you must link your application
294 * staticly; with -static.
296 * Contact PKWARE at 414-354-8699.
298 * 6. Modified radar_to_hdf_1.c. Removed ZDR data from 1C-51 HDF.
300 * 7. Moved HDF_FILE_VERSION definition from toolkit_1BC-51_appl.h
301 * into the application level_1.c
303 *----------------------------------------------------------------------
304 * v1.17 Began 4/23/98. Released: 4/28/98 (Severity: upgrade)
306 * 1. Finally received info regarding KDP (KD_INDEX) for SIGMET.
307 * Assumming the units are similar for LASSEN. Boosted nsig_to_radar
308 * to recognize KDP. It is really KDP * wavelength.
309 * The units are deg*cm/km. You must divide out the wavelength,
310 * if that is desired.
312 * 2. BADVAL/NOECHO mod for nsig_to_radar.c. This should affect
313 * the values that may be stored in any possible UF output.
315 * WTD : lassen_to_radar.c - check the ZDR conversion, if any. Do
319 *----------------------------------------------------------------------
320 * v1.16 Began 3/6/98. Released: 4/21/98 (Severity: bug fix/upgrade)
322 * 1. Changed how any_to_gif output's filenames produced. Now, they
323 * are written to stdout. -v (verbose) and -V (all volume) options
324 * are added. Changed image_gen.c (RSL_volume_to_gif) to output
325 * filenames to stdout.
327 * 2. You really do need 'bison' (GNU yacc), 'flex' (GNU lex) and
328 * make (GNU make) to build this library. This has been true
329 * since v1.15 when I introduced the rapic format. These programs
330 * are superior to those on your stock Unix system, so take the
331 * time to install them.
333 * 3. README explains how to apply patches.
335 * 4. Eliminated the reduce/reduce conflict in rapic.y
337 * 5. Year 2000 compliant.
339 * 6. I forgot the format in sprintf. See rapic.y.
341 *----------------------------------------------------------------------
342 * v1.15 Began 2/20/98. Released: 3/4/98 (Severity: bug fix/upgrade)
344 * 1. Michael Whimpey from BMRC, Australia changed code, for the
345 * different callibrations, between, Pre_mctex, mctex, Gunn_Pt
346 * periods. Please see code where there is m.whimpey. See
349 * 2. Added RAPIC format ingest. RSL_rapic_to_radar.
350 * I used GNU Bison (YACC) and GNU Flex (LEX) to code the RAPIC ingest.
351 * This format is used by the Berrimah radar. See rapic_to_radar.c,
352 * rapic_routines.c, rapic.y, and rapic.l.
353 * Not tested w/ older YACC and LEX found on older Unix systems.
355 * 3. Fixed a bug regarding the reading of stdin streams. Now
356 * you can read compressed or uncompressed files from stdin.
357 * Previously, you couldn't specify NULL as a filename and
358 * have it work reliably in all cases for any file format.
359 * This bug was found by accident and it is nothing you should
360 * be worried about in earlier RSL releases. The reason you need
361 * not worry about it is because 'RSL_anyformat_to_radar' cannot
362 * accept NULL as a filename. For you to notice this, you must
363 * have called the specific ingest routine for the format
364 * being read: RSL_lassen_to_radar, for example.
366 * 4. Bug in the UF ingest. The scale_factor needs to be float.
367 * When it was 'int', round off errors (truncation) were
368 * happening. This affected the Velocity data, only. The reflectivity
369 * data seemed unaffected, because, the magnitude of the values
370 * was high enough to avoid truncation.
371 *----------------------------------------------------------------------
372 * v1.14 Began 2/2/98. Released: 2/3/98 (Severity: upgrade)
374 * 1. Added calibration for Gunn Point radar. Assumes that
375 * the radar name will be 'Gunn_Pt'.
377 *----------------------------------------------------------------------
378 * v1.13 Began 1/16/98. Released: 1/26/98 (Severity: minor bug fix)
382 * 1. radar_to_hdf_1.c: Changed decision algorithm regarding
383 * whether or not to write a VOS into a 1C-51 HDF file.
384 * 1C-51 HDF VOS time_slot status is encoded within the
385 * metaData field 'TK_GEN_DATE_INPUT_FILES'.
387 *----------------------------------------------------------------------
388 * v1.12 Began 1/12/98. Released: 1/12/98 (Severity: minor bug fix)
390 * 1. Changed HDF metadata item for empty granules.
392 *----------------------------------------------------------------------
393 * v1.11 Began 12/17/97. Released: 12/17/97 (Severity: minor bug fix)
395 * 1. Increased the size of pipecmd in RSL_write_gif and TK_MAX_FILENAME to 256.* 2. Modified image_gen.c to increase the data range of Zdr values.
396 * 3. Bug fix in radar_to_hdf_1.c: No longer dumps core for "tiny" sweeps
397 having fewer than 5 rays.
399 *----------------------------------------------------------------------
400 * v1.10 Began 8/27/97. Released: 10/21/97 (Severity: minor upgrade)
402 * 1. Modified ZDR image generation: rsl.h, image_gen.c, ZDR color tables.
403 * 2. Added South Africa data format ingest. Not possible to
404 * interface in RSL_anyformat_to_radar, at this time. The format
405 * is primitive and I need to convert RVPC to dBZ.
406 * 3. Modified HDF component to maintain integrity of anomalous_condition
407 * flags. (RFVAL, APFLAG, NOECHO, BADVAL)
408 * Files: toolkit_1BC-51_appl.h, hdf_to_radar.c, radar_to_hdf_2.c
409 * 4. Modified radar_to_hdf_1.c for TSDIS/DAAC metadata requirements.
410 * 5. Modified any_to_gif.c to output site and date/time for image filenames.
411 * 6. Added QC algorithm parameter. Modified files:
412 * toolkit_1BC-51_appl.h, radar_to_hdf_1.c, radar_to_hdf_2.c,
415 *----------------------------------------------------------------------
416 * v1.9 Began 8/18/97. Released: 8/18/97 (Severity: bug fix)
418 * 1. Mofified radar_to_hdf_1.c : Metadata mods for TSDIS.
420 *----------------------------------------------------------------------
421 * v1.8 Began 7/30/97. Released: 8/05/97 (Severity: upgrade)
423 * 1. Added RSL_read_these_sweeps. Specify specific sweep numbers for
424 * ingest. This drastically speeds up ingest, if you're only interested
425 * in the first or first couple of sweeps. For example, making
433 * mcgill -done. BUT, apparently, mcgill ingest is broken!!!
434 * When did this happen?
436 * 2. Added RSL_load_zdr_color_table();
437 * Includes color tables for this field. See colors/
439 * 3. More HDF mods; more warning messages.
441 * 4. The TRMM Office has fixed several bugs in the TSDIS toolkit.
442 * For proper HDF creation, that conform to TSDIS HDF specifications,
443 * you will need toolkit 4.5r1.1.
445 * Toolkit 4.5r1.1 is an unofficial release; the TRMM office will
446 * pass this out upon request.
448 *----------------------------------------------------------------------
449 * v1.7 Began 7/23/97. Released: 7/25/97 (Severity: bug fix)
451 * 1. Handles corrupt SIGMET files more gracefully.
453 * 2. All lat/lon (degree,minute,second) triplets have the same sign.
454 * Except, if UF, then what ever the file tells me and if they're
455 * not all the same sign, then you'll have
456 * to correct the UF w/ an RSL application. In other words, UF
457 * stores the lat/lon as deg/min/sec and they have their own signs;
458 * Strict UF have deg/min/sec all w/ the same sign, anyway.
460 * 3. Minor changes to HDF component of RSL.
461 *----------------------------------------------------------------------
462 * v1.6 Began 5/02/97. Released: 7/23/97 (Severity: bug fix)
464 * 1. wsr88d_to_radar.c -- Was too permissive. No longer defaults to KMLB.
465 * If unable to establish a valid site based on callID or first_file,
468 * 2. 18 Jul 97 Kolander
469 * Modified radar_to_uf.c & uf_to_radar.c : Fixed some incorrect and
470 * missing sweep and ray header values. Salvaged some numerical precision.
472 * 3. Fixed a time problem in nsig_to_radar.c. Daylight savings time.
474 * 4. Saves lat/lon on each ray for UF.
476 *--------------------
479 * Modifications to radar parameter calulations in:
480 * wsr88d_to_radar.c, wsr88d.h, wsr88d.c, nsig_to_radar.c,
481 * lassen_to_radar.c, rsl.h
483 * Modified HDF-related files:
484 * hdf_to_radar.c toolkit_1BC-51_appl.h
485 * and split file 'radar_to_hdf.c' into two files:
486 * radar_to_hdf_1.c and radar_to_hdf_2.c
487 * Can handle oddly sized and/or corrupt VOSs.
488 *----------------------------------------------------------------------
489 * v1.5 Began 3/17/97. Released: 4/30/97 (Severity: minor upgrade)
491 * 1. Additional error checking in wsr88d.c to warn when number of gates
492 * expected is exceeded.
493 * 2. Changes by Mike Kolander affect the HDF component of RSL. This
494 * version of RSL works with the TSDIS toolkit 4.0.
495 * 3. Changes to carpi and cube functions, see below.
496 *-------------------------
497 * Date: 26 Mar 97 kolander
499 * Files: radar_to_hdf.c, hdf_to_radar.c
500 * Moved QC parameters out of the metadata string into VOS comments
503 * Files: rsl.h, anyformat_to_radar.c
504 * Moved enum File_type definition from anyformat_to_radar.c into
506 *--------------------------
507 * Date: 17 Mar 97 kolander
510 * Changed carpi structure:
511 * Added f, invf fields.
512 * (Carpi_value **)data is now a doubly indexed array 'data[nrow][ncol]'
513 * Changed slice structure:
514 * Added f, invf fields.
515 * (Slice_value **)data is now a doubly indexed array 'data[nrow][ncol]'
516 * Added function prototypes for:
517 * RSL_free_carpi, RSL_free_cube, RSL_free_slice, RSL_new_cube,
518 * RSL_new_slice, RSL_carpi_to_cart, RSL_carpi_to_gif,
519 * RSL_carpi_to_pict, RSL_carpi_to_ppm, RSL_carpi_to_pgm
523 * RSL_free_slice, RSL_new_slice, RSL_new_cube, RSL_free_cube
524 * Modified functions:
525 * RSL_volume_to_cube, RSL_get_slice_from_cube
530 * Modified functions:
531 * RSL_new_carpi, RSL_find_rng_azm, RSL_cappi_to_carpi
535 * (These are modified clones of the sweep image_gen functions.)
536 * RSL_carpi_to_cart, RSL_carpi_to_gif, RSL_carpi_to_pict,,
537 * RSL_carpi_to_ppm, RSL_carpi_to_pgm
539 *----------------------------------------------------------------------
540 * v1.4 Began 12/24/96. Released: 3/7/97 (Severity: bug fix)
542 * 1. Some WSR88D files have a 'radial status' of 28. This is un-
543 * documented. I assume it means some catastrophic reset has occured.
544 * Therefore, the code that counts the number of rays is modified
545 * to rely on the 'ray_num' reported upon reading the file.
546 * Also, I assume that when the status tells me that I'm reading
547 * the 'start of a new elevation' (status == 0) that all subsequent
548 * records will overwrite previously stored rays.
550 * I've seen this status number(28) occur, rarely, in the
551 * WSR88D data. See wsr88d.c.
553 * 2. Removed kwaj component. - Mike.
555 * 3. Installs toolkit_1BC-51_appl.h in INCDIR. This file is needed
556 * only if you plan to use the HDF component.
558 * 4. Fixes a freeing bug in nsig.c. Added member nparams to the
559 * NSIG_Sweep structure to track this for the free routine.
561 * 5. Ray indexing bug fixed in wsr88d_to_radar.c which produced an
562 * invalid time when the first wsr88d ray was null. Basically, using
563 * 'i' instead of 'iray'.
564 *----------------------------------------------------------------------
565 * v1.3 Began 08/26/96. Released: 12/17/96 (Severity: upgrade)
567 * 1. Lassen field 'Zdr' loaded into RSL 'ZD' field, not the RSL 'DR'
568 * field, as originally envisioned within HDF functions. Henceforth,
569 * 'ZD' represents (linear) reflectivity depolarization ratio:
570 * ZD = 10log(Z_horiz/Z_vert) in units dB
571 * as opposed to the circular depolarization ratio.
573 * What exactly are the RSL 'LR' and 'DR' fields??
576 * For consistency of field nomenclature:
578 * Renamed 'CR' to 'CD'. (corrected ZDR for 1C-51)
579 * 'MR' to 'MD'. (1C-51 mask for ZDR)
582 * CD_INVF returns ZD_INVF
584 * 2. Sort by time forgot to compare the hour field. Minor fix.
586 * 3. Fix z_to_r to return proper value.
588 * 4. Lassen ingest: fix the sign of deg/min/sec so they match.
589 * Trusting that the sign of the deg is correct.
591 * 5. Added RSL_select_fields. This reduces memory requirements
592 * upon ingest. You can select, "all" (default), "none" (just to
593 * get header info) or "dz", "vr", ...
601 * kwaj not applicable as it only has DZ.
603 * mcgill not applicable as it only has DZ.
604 * toga not done. If you want to do this, feel free.
606 * 6. Uses 'gzip -1'. This cuts the time for making UF files in half.
608 * 7. Renamed 'makefile' to 'Makefile'
610 * 8. The HDF component has changed drastically and is not compatable
611 * with previous versions. It may change again, contingent upon
612 * the TSDIS toolkit 3.5.2.1 (as of 12/17/96). Expect minor changes
613 * to the HDF component in the future.
615 * 9. Pruning of sweeps and rays now sets moved object pointers to
618 *10. Updated nsig_to_radar.c to check for ant_scan_mode. If mode is
619 * RHI, then return NULL because RSL can't handle RHIs. --Paul
621 *11. Split memory management routines for hdf processing. --Mike K.
622 *----------------------------------------------------------------------
623 * v1.2 Began 08/26/96. Released: 9/6/96 (Severity: minor bug-fix upgrade)
625 * 1. Eliminated zero sized arrays in lassen.h. SGI 'cc' can't
626 * handle zero sized arrays. This brings back the -pedantic
629 * 2. Implemented popen and pclose (called rsl_popen and rsl_pclose)
630 * to eliminate the annoying message 'Broken pipe.' on SGI and HP
633 * 3. The HDF component is incompatable with earlier versions because
634 * of the use of additional fields. It now uses the MASK fields
635 * and calibration information. It should be considered that the
636 * HDF component is in a state of flux.
638 * 4. Minor bug in nsig.c wherein when rays are missing (0 sized)
639 * that not all rays present will be ingested. This is fixed.
641 * 5. Copyrighted the software.
643 * 6. 'anyformat_to_radar' can recognize HDF files.
645 *----------------------------------------------------------------------
646 * v1.1 Began 08/21/96. Released: 08/22/96 (Severity: SERIOUS bug fix)
647 * If you have already upgraded to RSL v1.0.1, then this is a minor
650 * 1. I should have left well enough alone. But, getting rid
651 * of rsl.h.template in favor of only having rsl.h has revealed
654 * THIS BUG IS IN V1.0 ONLY.
656 * The type for 'Range' could be built into
657 * the RSL differently than how your application is built.
658 * For instance, if RSL is built with USE_TWO_BYTE_PRECISION, then
659 * your application will think 'Range' is a one byte storage class,
660 * because the default RSL configuration is to use one byte storage.
662 * This bug slipped through all the tests that I perform and was
663 * discovered only when using the radar_to_hdf component of RSL.
664 * Thanks to Mike Kolander for finding this one.
666 * Configuration instructions are changed so that you must edit
667 * rsl.h to use one byte precision.
669 * 2. All MCTEX fields are recognized and loaded into Radar.
670 * h.f and h.invf are modeled after LASSEN conversion functions.
671 * 3. Added radar_to_hdf.o to makefile.
672 * 4. In examples/any_to_gif.c, outputs all fields.
673 * 5. Three convience arrays are defined in rsl.h.
676 * c. RSL_invf_list[];
677 * Each array is MAX_RADAR_VOLUMES long and contain: strings
678 * representing the field type, a pointer
679 * to the F function, and a pointer to the INVF function.
681 * Usage is conditional by defining USE_RSL_VARS before including
683 * #define USE_RSL_VARS
686 * Normally, you shouldn't worry about this.
688 * 6. Removed -pedantic compile flag because LASSEN code has a 0
689 * sized array -- no warnings.
690 *----------------------------------------------------------------------
691 * v1.0 Began 04/19/96. Released: 8/18/96 (Severity: minor upgrade)
693 * 1. Ignore SIGPIPE when making images.
694 * 2. Can read UF files of MCTEX data. This UF file contains
695 * RH and PH fields. This is LASSEN data that has been converted
696 * to UF via a sun program. It is the LASSEN II format.
697 * 3. Fixed date/time == 0 when calling uf_to_radar multiple times.
698 * The second and subsequent calls produced 0 for the
699 * radar->h.year/month/day and radar->h.hour/min/second.
700 * 4. Always allocate MAX_RADAR_VOLUMES for new radars during ingest.
701 * This will allow one to test any volume index for presence.
702 * 5. Set the default functions to DZ_F. This sets CZ_F correctly.
703 * It is unclear if the other conversion fuctions are properly
705 * 6. Pure UF file ingest bug fixes.
706 * 7. Added RSL_hdf_to_radar - Mike Kolander.
707 * 8. Added RSL_radar_to_hdf - Mike Kolander.
708 * 9. New field type: XZ for X-band Reflectivity.
709 * 10. Working version of nsig_to_radar. - Paul Kucera.
710 * This version works on both big endian and little endian (Linux),
711 * and, for both version 1 and version 2 formats. Version 2
712 * files are generated on big-endian machines (so far, SGI Iris
713 * computers), whereas, Version 1 files were written on
714 * little-endian DEC computers. Two routines are provided:
716 * RSL_nsig_to_radar(char *infile);
717 * RSL_nsig2_to_radar(char *infile);
719 * Nsig ingest can handle nsig files/tapes that were
720 * written on a DEC (little endian) or an SGI (big endian).
721 * It is handled automatically by examination of the 'magic' bytes.
722 * You will note that the byte-ordering in the file is dependant
723 * on which machine wrote the tape or file. The New-SIGMET
724 * documentation does not specify which byte-ordering is to be used
725 * when the file is written.
727 * Re-wrote nsig.c and beefed up nsig.h. Now, there is an
728 * interface to read an entire nsig sweep. You can loop through
729 * the returned sweep and pick your values, and load RSL.
730 * This re-write was done to make reading version 2 files easier.
731 * Additionally, all NSIG code for version 1 and version 2 files
732 * is centrally located in:
736 * To have both versions supported in the same files, I use #ifdef
737 * and the C preprocessor. 'nsig.h' is saturated with #ifdef NSIG_VER2
738 * constructs. Thus, only one source is maintained for both NSIG versions.
740 * 11. Added RSL_print_version();
741 * 12. Added docs for users guide, hdf.
742 * 13. Added html 'grouping by functionality' page.
743 * 14. Restores stdin and stdout when creating pipes.
744 * The pipe readers need to loop until no data available, because
745 * 'read/fread' will not get all the data in one call.
746 * 15. Added moving platform headers to Ray structure:
747 * float pitch; Pitch angle.
748 * float roll; Roll angle.
749 * float heading; Heading.
750 * float pitch_rate; (angle/sec)
751 * float roll_rate; (angle/sec)
752 * float heading_rate; (angle/sec)
753 * float lat; Latitude (degrees)
754 * float lon; Longitude (degrees)
755 * int alt; Altitude (m)
756 * int rvc; Radial velocity correction (units of velocity)
758 * This information typically comes from NSIG. For other formats
759 * the values are all zero.
760 * 16. Read version 1.3 and 1.4 of LASSEN data. RSL_lassen_to_radar.
761 * This means that RSL can read MCTEX data.
762 * 17. Users manual. Walk a novice through a simple example and explain
763 * what header information is important. Teach how to take advantage
765 * 18. Eliminated the #ifeq in makefile. Thus, rsl.h.template is removed
766 * and rsl.h is resurrected.
767 *----------------------------------------------------------------------
768 * v0.45 Began 03/26/96. Froze: 03/27/96 (Severity: minor)
770 * 1. Fixed broken pipe problem on HP and SGI. Cause unknown.
771 * All I did was to remove the pclose in any_format_to_radar.c
772 * It seems that if there is any data left in the pipe that a
773 * SIGPIPE is sent when trying to close the pipe.
774 * On SGI's this causes a core dump. This bug is difficult to
776 * 2. Nsig ingest is severly broken. It always was. Work in
778 * 3. It is important that TSDIS get this version to run on their SGI
779 * as it prevents a core dump. Normally, this shouldn't affect
781 *----------------------------------------------------------------------
782 * v0.44 Began 03/19/96. Froze: 03/19/96.
784 * 1. In prune.c, pointers that are pruned are now set to NULL.
785 * This elimated core dumps associated with trying to free structues.
786 * 2. On gzip-ed UF output, stdout is flushed before the pipe is opened.
787 * 3. Added reverse.c -- Reverse the order of the sweep pointers in
789 *----------------------------------------------------------------------
790 * v0.43 Began 03/01/96. Froze: 03/05/96.
792 * 1. farea.c -- nbins fix.
793 * 2. On UF output, checks for NOECHO.
795 *----------------------------------------------------------------------
796 * v0.42 Began 11/27/95. Froze: 02/16/96.
798 * 1. Removed '#include <strings.h>'.
799 * 2. Added a couple of missing prototypes in rsl.h.template.
801 * Ray *RSL_prune_ray (Ray *ray);
802 * Sweep *RSL_prune_sweep (Sweep *s);
803 * Volume *RSL_prune_volume(Volume *v);
804 * Radar *RSL_prune_radar (Radar *r);
806 * These routine remove dataless substructures. Prompted by
807 * poor NCAR ingest routines for UF files; it is wise to prune
808 * a Radar prior to calling RSL_radar_to_uf. Therefore, if
809 * software cannot read the UF files created by RSL, then try these
810 * prune functions before outputting the UF file. In either case,
811 * RSL_radar_to_uf produces valid UF files.
812 * 4. Removed trigraph in mcgill.c.
813 * 5. Fixed lassen ingest problem on Linux. I think XDR has a bug
814 * where bit fields are not loaded properly. This is a kludge fix.
815 * 6. Removed column.c. Code not mature and takes way too much
816 * RAM. Included in the removal are the vertical structure routines.
817 * The code has been moved to the application (qcwin).
818 * 7. RSL_get_first_ray_of_sweep now returns when the ray number is 1 or
819 * 0. This drasitically speeds the routine.
820 * 8. Increased the UF buffer size from 4096 to 16384.
821 *----------------------------------------------------------------------
822 * v0.41 Began 11/01/95. Froze: 11/20/95.
824 * 1. Minor doc changes. More up to date with implementation.
825 * 2. Implemented 'radar_type' in the radar_header structure. Values
826 * are strings and are: "wsr88d", "lassen", "uf", "nsig", "mcgill",
827 * "kwajalein", "toga".
828 * 3. Increased range of data (internal storage conversion functions)
829 * when using 2 byte storage. Some nsig data can have values below the
830 * default wsr88d function range.
831 * 4. 'farea.c' -- Volumes are used to compute the fractional area.
832 * This matches the latest specification of the function.
833 * 5. Automatically uncompress files. Transparently sets up
834 * a decompression pipe. If the input is not stdin, then 'anyformat_to...'
835 * can peek inside a compressed file and determine what ingest routine to
836 * use. Reading copmressed files from disk and internally uncompressing
837 * them turns out to be the fastest form of ingesting wsr88d (only format
838 * timed) data on my 486. However, I get mixed results on the HP 755.
839 * 'anyformat_to...' uses 'gunzip' to peek inside compressed files.
840 * 6. Can make gzip-ed UF files. The new routine is 'RSL_radar_to_uf_gzip'.
841 * Also, RSL_radar_to_uf_fp takes a file pointer. Thus, you can
842 * define your own output filter.
843 * 7. Added RSL_write_radar_fp, RSL_write_radar_gzip.
844 *----------------------------------------------------------------------
845 * v0.40 Began 10/24/95. Froze: 10/24/95.
847 * 1. Type cast for Sweep_header and Ray_header was removed so that
848 * stock 'cc' on SGI could digest the code. File: column.c. Why?
850 * Version 0.39 was short lived. :-)
851 *----------------------------------------------------------------------
852 * v0.39 Began 7/1/95. Froze: 10/24/95.
854 * 1. Mcgill library is not separate. Included in rsl in whole.
855 * 2. Interpolation routines added.
856 * 3. Added RSL_load_height_color_table -- and the colors/*height.clr
857 * 4. Added RSL_load_rainfall_color_table -- and the colors/*rainfall.clr
858 * 5. Removed RSL_print_{volume,sweep,ray}
859 * 6. Removed some unused routines.
860 * 7. Vertical_structure is its own type composed of Vertical_sweeps and
861 * Vertical_rays (columns).
862 * 8. Added doc/internal_routines.html.
863 * 9. UF is exchangable between big and little endian. Finally, this
864 * has been fixed. Now UF can be generated on little endian machines
865 * and read on big endian (the UF generated is in big endian format even
866 * on the little endian machine). And, visa versa.
867 *10. New version of RSL_get_vertical_structure in column.c. Doc's updated.
868 *11. Fixed bug in radar_to_uf. When the number of actual sweeps (and perhaps
869 * volumes) is less than the determined max of the entire radar structure,
870 * then the pointers may be erroneous. Paul caught this flounder.
871 *12. Added RSL_uf_to_radar_fp. The FILE *fp version of the UF ingest.
872 * Also, passing NULL to RSL_uf_to_radar means to read from stdin.
873 *13. Added NOECHO flag for f and invf. Currently, defined for UF, NSIG and
875 *14. Included source for libraries: wsr88d, lassen, tg, nsig, mcgill,
876 * and kwajlein. Now linking needs only: -lrsl -lm
877 *15. Simplified the configuration procedure. All configuration
878 * is specified from 'makefile'. See README for new install instructions.
879 *16. Removed ray_status, sec_num, atm_att, min_dif, sys_cal from ray
880 * header. These are not used and specific for wsr88d.
881 *17. Summary of routine that handle NULL filenames as STDIN.
882 * RSL_wsr88d_to_radar
883 * RSL_uf_to_radar -- calls --> RSL_uf_to_radar_fp
884 * RSL_lassen_to_radar
887 * RSL_mcgill_to_radar
888 *18. Removed RSL_get_sweep_index_from_volume.
889 *19. Removed RSL_X_ray_indexes. Actually, just renamed the routine
890 * to 'construct_sweep_hash_table'. The hash table retains the hi and
891 * low ray pointers for closest ray comparison. Angle diff's removed.
892 *20. Removed hash table implementation in the Sweep structure. It
893 * is now implemented internally in RSL.
894 *21. BADVAL valued depends on Range type. Picked to be out of range.
896 *----------------------------------------------------------------------
897 * v0.38 Began 6/1/95. Froze 6/29/95.
899 * 1. Makes 2's compliment, instead of 1's compliment, in sweep_to_cart.
900 * 2. Modifications to eth functions.
901 * 3. Added routine RSL_get_column. See column.c.
902 * 4. Added Column data structure.
903 * 5. Static pointer for image generation. Free up image pointer and
904 * reallocate. Otherwise, we've got a memory leak when making many
906 * 6. Added Paul's and Dennis's modifications of the cappi routines.
907 * I modified the cappi structure so that Sweep is a substructure.
908 * This makes image generation and get_value_from_cappi easy to implement.
909 * 7. Added a test program in examples/cappi_image.c to test cappi
911 * 8. Change doc/ for the cappi routines. Routines added/modified are:
912 * float RSL_get_value_from_cappi(Cappi *cappi, float rng, float azm);
913 * int RSL_fill_cappi(Volume *v, Cappi *cap, int method);
914 * void RSL_free_cappi(Cappi *c);
915 * Cappi *RSL_new_cappi(Sweep *sweep, float height);
916 * Cappi *RSL_cappi_at_h(Volume *v, float height, float max_range);
917 * Carpi *RSL_cappi_to_carpi(Cappi *cappi, float dx, float dy,
918 * 9. Carpi structure modified to be compatable with cappi routines.
919 * 10. Added RSL_get_gr_slantr_h. -> range.c
920 * 11. RSL_uf_to_radar only recognizes UF files.
921 * 12. RSL_uf_to_radar handles TRUE UF, 2 and 4 byte record length delimeters.
922 * 13. Minor bug fix in ray_indexes.c to handle RHI input. The number of
923 * hash table entries is now a function of the beam_width and not the
925 * 14. Bug fix in rebin_velocity_sweep. New velocity color tables.
926 * 'examples/qlook.c' added. Yet another image generation program;
928 * 15. RSL_uf_to_radar allocated additional space for sweeps, when the
929 * initial allocation is not enough.
930 * 16. Added a programmers guide. See programmers_guide.html.
931 * 17. Get_closest routines removed.
932 * 18. Added RSL_kwaj_to_radar. -- Mike Kolander.
933 * 19. Added docs for RSL_kwaj_to_radar.
935 * Note: Since v0.37 we've been using h.f and h.invf for the storage
936 * functions and, thus, the library is not compatable with earlier
937 * versions. All subsequent version are, however, compatable.
938 * This means, code that used v0.36 and earlier will break (not
939 * even link) with v0.37 or later.
942 * ray->h.f(ray->range[i]) instead of F(ray->range[i])
944 * ray->h.invf(x) instead of INVF(x).
946 *----------------------------------------------------------------------
947 * v0.37 Began 5/24/95. Froze 5/29/95.
949 * 1. Removed RSL_float_to_char; too specific.
950 * 2. Implemented seperate conversion functions for each field type.
951 * This added h.f and h.invf to Volume, Sweep and Ray headers.
952 * The ingest routines optionally define there own conversion function.
953 * Most of the time, though, I use the default: wsr88d conversions.
954 * Tested: wsr88d, lassen, mcgill, UF, rsl.
955 * Coded but not tested: toga, nsig.
956 * 3. Added ETH routines:
957 * Sweep *RSL_get_eth_sweep(Volume *v,float et_point);
958 * float RSL_get_echo_top_height(Volume *v,float azim,float grange, float et_point);
959 * 4. If using #define USE_TWO_BYTE_PRECISION, uses 100 as a storage
960 * factor. Now, there is no loss of precision when converting between
961 * internal and float. Before there was just a minor round off when
962 * using any data that used anything other than 1/2 dbz precision.
963 * Using 100 is more than enough.
964 *----------------------------------------------------------------------
965 * v0.36 Began 5/19/95. Froze 5/19/95.
967 * 1. Magic in anyformat_to_radar was slightly different than expected
968 * for lassen data. Tested on lassen data.
969 * 2. DEFAULT is to use 2 byte storage precision. See rsl.h.
970 * 3. Several changes to get_closest routines -- Flanigan.
972 *----------------------------------------------------------------------
973 * v0.35 Began 5/18/95. Froze 5/18/95.
975 * 1. Checks iazim validity in ray_indexes.c. Bad angles use to cause
977 * 2. wsr88d_to_radar can handle bogus filenames and callid's.
979 *----------------------------------------------------------------------
980 * v0.34 Began 5/17/95. Froze 5/18/95.
982 * 1. Modified the bscan interface.
984 * 2. Fixed a minor nrays bookkeeping bug in radar_to_uf.
986 * 3. Updated Sweep searching routines.
988 * 4. Added get_closest and get_next_closest ray searching routines.
989 * Updated RSL_get_ray_from_sweep so that it uses the
990 * new_get_closest function.
992 *----------------------------------------------------------------------
993 * v0.33 Began 5/12/95. Froze 5/16/95.
995 * 1. Configure for building using 2 byte precision instead of 1 byte.
996 * This should quell any accuracy problems associated with the
997 * functions F and INVF.
999 * 2. Added 'RSL_mcgill_to_radar'. Link with -lmcgill.
1001 * 3. Bug fix in cube.c, cappi.c, and carpi.c.
1002 *----------------------------------------------------------------------
1004 * v0.32 Began 5/5/95. Froze 5/12/95.
1006 * 1. Compiles with -Wall -ansi -pedantic.
1007 * 2. Minor bug fixes in get_win.c
1008 * 3. Compiles on SGI, 486, SUN, HP using gcc or stock cc.
1009 *----------------------------------------------------------------------
1010 * v0.31 Began 4/28/95. Froze 5/5/95.
1012 * 1. Added ray_high and ray_low Azimuth_hash pointers
1013 * to Azimuth_hash data structure and code in the
1014 * the routine RSL_sweep_ray_indexes to set these
1015 * pointers. ray_low points to the Azimuth_hash
1016 * with the next lowest ray_angle, with ray_high
1017 * points to the next highest.
1019 * 2. Created internal routine dir_angle_diff. Returns
1020 * negitive difference if the second angle in
1021 * the parameter list is counter-clockwise to the
1022 * first angle. Returns positive is second
1023 * angle is clockwise tk first angle.
1025 * 3. Added internal routine the_closest_hash. This
1026 * routine returns the an Azimuth_hash
1027 * data structure that contains the closest
1028 * ray to the requested angle.
1030 * 4. Added two routines: RSL_get_closest_ray_from_sweep and
1031 * RSL_get_next_closest_ray_from_sweep.
1033 * 5. Added routines: RSL_get_window_from_radar,
1034 * RSL_get_window_from_volume, RSL_get_window_from_sweep, and
1035 * RSL_get_window_from_ray.
1037 * 6. Modified farea.c.
1038 * 7. Isolated contruction of azimuth table linked list.
1039 * 8. Fixed get_sweep NULL sweep reference (See patch v0_29_3 also).
1040 * 9. Compiles on HP CC, SGI CC, GNU CC. I had to #ifdef the
1041 * varargs declaration in anyformat_to_radar.c. Why?
1042 * 10. Added examples/killer_sweep.c. This randomizes the azimuth
1043 * values of each ray. The output checks the sortedness of the
1044 * hi and low links in the hash table.
1045 * 11. Added doc/...closest... doc/...next_closest...
1047 *-------------------------------------------------------------------------
1048 * v0.30 Began 4/20/95. Froze 4/27/95
1050 * 0. IMPORTANT: Renamed libradar.a to librsl.a. Also, radar.h to rsl.h.
1051 * 1. Removed NOTFOUND_H reference in the get_ray function.
1052 * 2. Simplified get_sweep.
1053 * 3. Uses within 1/2 beam_width test in get_ray_from_sweep.
1054 * 4. Checks -1 and +1 bin in azimuth hash table to really find the
1055 * closest ray that is within 1/2 beam_width of the target azim.
1056 * Surprisingly, it shortened the get_value_from_sweep routine.
1058 * 5. Added anyformat_to_radar.c. Uses magic information to determine
1059 * the file format. Handles: UF, RSL, WSR88D, LASSEN. Toga may
1060 * be difficult. Unknown, yet, for NSIG. Alan will get me that
1062 * 6. Added beam_width to the ray structure.
1063 *-------------------------------------------------------------------------
1064 * v0.29.1 Began 4/18/95. Froze 4/18/95.
1066 * 1. Bug fix in endian.c. Needed to initialize the word.val to 0.
1067 * 2. Bug fix in radar_to_uf.c. little_endian() call.
1068 * 3. Added Azumuth_hash to structure list in doc/.
1069 * 4. Other minor changes.
1070 *-------------------------------------------------------------------------
1071 * v0.29 Began 3/1/94. Froze ??/??/??
1073 * 0. Thanks to Dennis Flanigan for helping with this release.
1075 * 1. Modified sort_rays.c. By Dennis Flanigan, Jr.
1076 * a. Added h.sorted_flag to Volume and Sweep header structures.
1078 * b. Added routines:
1079 * int ray_sort_compare_by_time(Ray **r1,Ray **r2);
1080 * int sweep_sort_compare(Sweep **s1, Sweep **s2)
1081 * Sweep *RSL_sort_rays_by_time(Sweep *s);
1082 * Volume *RSL_sort_sweeps_in_volume(Volume *v)
1083 * Volume *RSL_sort_volume(Volume *v)
1084 * Radar *RSL_sort_radar(Radar *r)
1086 * c. Routines that sort data structures now set the
1087 * number of structures in the parent data structure.
1089 * d. Fixed: nsweeps was not being set correctly by
1090 * RSL_sort_sweeps_in_volume.
1092 * 2. Removed sort calls in the ingest routines: (whatever)_to_radar.
1094 * 3. Removed the auxillary trig tables in image_gen.c. It's just a
1097 * 4. Changed the extension of the tar archives to .tgz. This
1098 * allows netscape to ftp the file rather than displaying it :-)
1100 * 5. Added variables in the sweep data structures to represent
1101 * the half of the beam width angles. These variables are
1102 * vert_half_bw and horz_half_bw. Also added code to all
1103 * RSL ingest routines (something_to_radar) to set these values.
1104 * The half angle values are used in the volume.c searching routines.
1106 * 6. Added h.indexes to Sweep structure. This is a simple hash
1107 * table for making azimuth lookup cake. So far, I've only
1108 * got the malloc part placed in the routines that create the
1109 * radar structure. Added the file 'ray_indexes.c'. This changes
1110 * RSL_get_value_from_ray.
1117 * RSL_sort..??? really???
1119 * RSL_{write,read}_radar
1123 * RSL_sweep_struct.html
1127 * 8. Added CHECK_LIST.
1129 * 9. Changed the name from radar-v0.?? to rsl-v0.??.
1132 *-------------------------------------------------------------------------
1133 * v0.28 Began 7/23/94. Froze 2/16/95
1136 * 1. Support for little endian machines (*86 PC's using Linux).
1137 * Includes 'endian.c' in 'uf_to_radar.c' and 'radar_to_uf'. It is not
1138 * needed in 'lassen.c' because that program uses xdr to transfer the
1139 * data. Nor is it required in 'wsr88d_to_radar.c', 'nsig_to_radar.c'
1140 * nor 'toga_to_radar.c' because the support for little endian is in
1141 * the respective libraries: libwsr88d.a, libnsig.a, libtg.a.
1149 * In order to make this library compatable with versions on either
1150 * big endian or little endian machines, it will be adopted that all
1151 * output will be in big endian format. Little endian machines will
1152 * have to do the extra work of swapping bytes upon input as well as
1153 * swapping bytes on output. I could adopt to use the xdr library,
1154 * however, it seems too complicated for the simple task of always
1155 * guarenteeing that the output is in big endian format. After all,
1156 * we only support one output format: UF. (Well, we will make our own
1157 * radar format output in big endian format too, but we keep that
1158 * knowledge hush hush).
1160 * 2. Documentation in the seperate directory complete for all routines
1161 * in the RSL. Documentation froze at v0.27 and is in HTML format.
1162 * The documentation version number will be updated to match the version
1163 * number of the most current release of RSL. Note: The live link is
1164 * in /PUBLIC/httpd/htdocs/trmm_office/software/radar/quick_reference.
1165 * It is a symbolic link to ~/proj/trmm/radar/doc/v0.xx.
1167 * 3. Added RSL_ prefix to all documentation. This renamed the HTML files
1168 * to begin with RSL_, also.
1170 * 4. Prefixed all routines with RSL_. Status is that it builds.
1171 * 5. Combined radar.h, cube.h and volume.h into radar.h.
1173 *-------------------------------------------------------------------------
1174 * v0.27 Began 7/23/94. Froze 9/13/94.
1177 * 1. Beam width calculation in get_value_from_sweep is not 1/2 on either
1178 * side. No provision for best fit. See WTD #2.
1179 * 2. Added sort_rays.c. Sort rays in a sweeps and volumes.
1180 * 3. Added Vset_earth_radius. Set global variable 'Re' (Default: 4/3R).
1181 * 4. Added trig modification of get_slantr_and_h.
1182 * 5. Added sort rays call to: toga_to_radar, wsr88d_to_radar,
1183 * uf_to_radar, lassen_to_radar.
1184 * 6. Added cube.c. By Mike Kolander.
1186 * 8. Added toga_to_radar.c. By Mike Kolander.
1187 * 9. Signed all source files.
1188 * 10. Quieted some image print statements. See image_gen.c.
1189 * 11. Changed wsr88d_to_radar so it takes 'first_file' or the 4 character
1190 * call sign (eg. KMLB).
1191 * 12. Fixed makefile so it removes libradar.a before building. This prevents
1192 * duplicate object files, only the long filenamed ones, from
1193 * appearing in the archive file.
1194 * 13. Added gts.c. By Dave Wolff.
1195 * 14. Fixed minor round off error in 'uf_to_radar' which caused a 0 dBZ spike.
1196 * 15. Added histogram.c. By Dave Wolff.
1197 * 16. Added nsig_to_radar.c. By Alan McConnell.
1202 * 2. Vget_value_from_sweep. When the beam width is increased we
1203 * want to return the value that is the best fit for a ray and not
1204 * just the first fit. Currently when the beam width is really
1205 * large then we will pick the wrong beam for the desired point.
1207 * 3. Add the following to the ray header:
1209 * - offset for azim, range, elev (for moving radar)
1210 * - lat/lon (for moving radar)
1212 * 4. Bilinear interpolation.
1213 * 6. Modify get_ray_above to return a good ray so that QC doesn't zap points
1215 * 7. Optimize/Improve the get_value routine.
1216 * 8. Remove V prefix to routine names?
1217 * 10. Fix why there are bands of missing data when making images.
1218 * 11. Specify resolution when making images.
1219 * 14. Update: doc's (in HTML), README, etc.
1220 * 16. NEED *TESTING* suite of programs.
1222 * Proposed changes for v0.28
1223 * 1. Add support for little endian machines (386, 486, etc.)
1224 * 2. F(x, DZ) or ray->f.dz(x). I.e., object function conversion functions.
1227 *-------------------------------------------------------------------------
1228 * v0.26 Began 7/23/94.
1230 * 1. Adding cappi_to_carpi.
1231 * 2. Enhanced the Cappi structure; not the same as a sweep anymore.
1233 *-------------------------------------------------------------------------
1234 * v0.26 Began 7/13/94. Froze 7/20/93.
1236 * 1. Units for wavelength, in radar_to_uf, changed from meters to cm;
1237 * as they should be.
1238 * 2. Library runs quietly. No noisy print statements. Call
1239 * radar_verbose_on() and radar_verbose_off() to control printing.
1240 *-------------------------------------------------------------------------
1241 * v0.25 Began 7/1/94. Froze 7/1/94
1243 * 1. Modifications to makefile to add portibility to building on
1244 * other systems w/o gcc. Change to CFLAGS.
1246 * 3. Moved documents radar.ez and volume.ez to ../doc (../doc_RCS).
1247 * This means that the version of the documentation will not be kept
1248 * up to the version of the RSL library. Only changes to the doc. will
1249 * force a new version of the documentation. I'll want to see if this
1251 *-------------------------------------------------------------------------
1252 * v0.24 Began 6/29/94. Froze 6/29/94
1254 * 1. radar_to_uf, uf_to_radar. Fixed inconsistant use of BADVAL vs.
1255 * UF_NO_DATA. The latter is check and used.
1256 * 2. Added function:
1257 * float get_nyquist_from_radar(Radar *radar);
1258 * Useful, for loading non-velocity fields with PRF, PRT and NYQUIST.
1259 * 3. Made the makefile more general and added comments.
1262 * 1. Modify wsr88d_to_radar to fill PRF, PRT and NYQUIST values in
1263 * non-velocity rays.
1264 *-------------------------------------------------------------------------
1265 * v0.23 Began 6/27/94. Froze 6/27/94
1267 * 1. First distribution release.
1268 * 2. Added README w/ installation instructions.
1269 * 3. Made example_main and colors directories.
1270 * 4. Shortened lassen.h to be close to minimial.
1271 * 5. Modified makefile to only make libradar.a. Example_main/ has it's
1273 *-------------------------------------------------------------------------
1274 * v0.22 Began 6/24/94. Froze 6/24/94
1276 * 1. radar_to_uf/uf_to_radar PRF/PRT calculation corrected.
1278 *-------------------------------------------------------------------------
1279 * v0.21 Began 6/24/94. Froze 6/24/94
1281 * 1. radar_to_uf: prf now in microseconds.
1282 * 2. uf_to_radar: prf now converted from microseconds to seconds.
1284 *-------------------------------------------------------------------------
1287 * Need to determine the changes.
1288 *-------------------------------------------------------------------------
1289 * v0.19 Began 6/17/94. Froze: 6/17/94.
1291 * 1. Fixed NULL access in write_radar subroutine.
1293 *-------------------------------------------------------------------------
1294 * v0.19 Began 6/15/94. Froze: 6/15/94.
1296 * 1. Check for NULL in Vget_ray_from_sweep fixes a segmentation fault on
1298 *-------------------------------------------------------------------------
1299 * v0.18 Began 6/11/94. Froze: 6/12/94 2pm.
1301 * 1. Minor changes in volume.c. Vget_value_from_sweep now uses the
1302 * beam_width for matching rays. See Vget_sweep too.
1303 * 2. cappi.c sets the beam_width.
1304 * 3. Added radar types. There is no sure fire way to set
1305 * radar->h.radar_type to one of these values automatically, ie. from
1306 * information in the input file. It may have to be done by the
1307 * application; a runtime parameter, option.
1309 * TOGACOARE_TOGA_SIGMET
1310 * TOGACOARE_MIT_SIGMET
1311 * TRMM_DARWIN_LASSEN
1312 * DARWIN_TOGA_SIGMET
1313 * TRMM_MELBOURNE_WSR88D
1314 * TRMM_KWAJALEIN_SIGMET
1315 * TRMM_HOUSTON_WSR88D
1316 * 4. Added function:
1317 * Sweep *Vget_first_sweep_of_volume(Volume *v);
1318 * 5. Placed the wsr88d code in wsr88d_to_radar.c (removed from radar.c).
1321 * 1. Rework Vget_value_from_sweep to do a better search for the value.
1323 *-------------------------------------------------------------------------
1324 * v0.17 Began 6/10/94. Froze 6/10/94 3:30pm.
1326 * 1. Corrected the pulse width calculation in uf_to_radar and in
1328 *-------------------------------------------------------------------------
1329 * v0.16 Began 6/10/94. Froze 6/10/94 12:30pm.
1331 * 1. Minor changes to radar.c because v1.3 of the wsr88d library is
1332 * now using WSR88D_DZ, WSR88D_VR, WSR88D_SW as the field type mask.
1333 * REFLECTIVITY, VELOCITY and SPECTRUM_WIDTH are not used.
1335 *-------------------------------------------------------------------------
1336 * v0.15 Began 6/7/94. Froze 6/7/94 1pm.
1338 * 1. Discovered that the range to bin1 calculation in radar_to_uf.c and
1339 * uf_to_radar.c was incorrect. See fh[2] and fh[3].
1341 *-------------------------------------------------------------------------
1342 * v0.14 Began 6/2/94. Froze 6/2/94 1pm.
1344 * 1. Modified the date for the Radar structure for UF reading to reflect
1345 * the time of the first ray. It was the generation time of the radar
1346 * structure, however, Dave Wolff insists that it reflect the time of
1347 * the first ray. Modification to 'uf_to_radar.c'
1349 *-------------------------------------------------------------------------
1350 * v0.13 Began 6/2/94. Froze 6/2/94 11am.
1352 * 1. Modified radar_to_uf.c to undo the faking of the headers. This is
1355 *-------------------------------------------------------------------------
1356 * v0.12 Began 5/31/94. Froze 5/31/94 7pm.
1358 * 1. Check for malloc errors in Vnew* routines.
1359 * 2. Fixed a nasty bug in radar_to_uf. I was letting 'j' get to high
1360 * for a particular ray in a sweep. 'j' is looping on the maximum
1361 * rays possible. I noticed this bug only after Vcopy_volume to
1362 * replace a radar->v[i].
1363 *-------------------------------------------------------------------------
1364 * v0.11 Began 5/27/94. Froze 5/27/94 12:50pm.
1366 * 1. Modified radar_to_uf.c to fake header information when fields do
1367 * exist, eventually, but not in the current sweep. This is to allow
1368 * brain dead UF ingestors (Zeb, RDSS, etc.) to read the UF file; they
1369 * assume that whatever fields exist in the first UF sweep is constant
1370 * throughout the file.
1372 * 2. Added functions to volume.c
1373 * Ray *Vget_first_ray_of_sweep(Sweep *s);
1374 * Ray *Vget_first_ray_of_volume(Volume *v);
1376 *-------------------------------------------------------------------------
1377 * v0.10 Began 5/26/94. Froze 5/27/94 9am.
1379 * 1. Modified the names of the INDEX and MASK variables.
1381 * ZT Total Reflectivity (dBZ) ZT_INDEX
1382 * May be uncommon, but important
1384 * DZ Reflectivity (dBZ), may contain some DZ_INDEX
1385 * signal-processor level QC and/or
1386 * filters. This field would contain
1387 * Darwin's CZ, or WSR88D's standard
1388 * reflectivity. In other words, unless
1389 * the field is described otherwise, it
1390 * should always go here. In essence, this
1391 * is the "cleanest" reflectivity field
1394 * DR Differential reflectivity DR_INDEX
1395 * DR and LR are for dual-polarization
1396 * radars only. Unitless or in dB.
1398 * LR Another form of differential ref LR_INDEX
1399 * called LDR, not sure of units
1401 * CZ QC Reflectivity (dBZ), contains
1402 * post-processed QC'd data CZ_INDEX
1404 * VR Radial Velocity (m/s) VR_INDEX
1406 * SW Spectral Width (m2/s2) SW_INDEX
1408 * 2. Fixed some MAX_RADAR_VOLUMES references in the wsr88d_to_radar code.
1410 *-------------------------------------------------------------------------
1411 * v0.9 Began 5/25/94. Froze: 5/26/94, 10am.
1413 * 1. Added lassen_to_radar.c
1416 *-------------------------------------------------------------------------
1417 * v0.8 Began 5/23/94. Froze: 5/24/94, 10am.
1419 * 1. F and INVF handle APFLAG.
1420 * 2. Image generation creates unsigned char images.
1421 * 3. 255-val for negative dBz (val < 0).
1423 *-------------------------------------------------------------------------
1424 * v0.7 Began 4/30/94. Froze: 5/20/94.
1428 * 1. Uses char storage for data values, to reduce RAM allocation.
1430 * 2. F(x) ((x-2)/2. - 64.)
1431 * 0 is for BADVAL. Bad value.
1432 * 1 is for RFVAL. Range folded.
1434 * 3. Added functions:
1435 * Vfloat_to_char(float *x, unsigned char *c, int n);
1436 * float F(unsigned char c);
1437 * unsigned char INVF(float x); -- Inverse of F.
1438 * Radar *uf_to_radar(char *infile);
1439 * void radar_to_uf(Radar *radar, char *outfile);
1441 * 4. Minor bug fix in wsr88d_to_radar routine. It was setting the
1442 * number of volumes to six even though we were only asking for 3.
1444 * 5. Changed the value of BADVAL to 0500 (Octal 500). This is
1445 * a value higher than 255 (the maximum byte value) but small enough
1446 * to that when a scale factor (typically 100) is applied, the result
1447 * does not exceed the I*2 (short) magnitude. I needed this for the
1448 * UF programs. I could have tested for BADVAL, RFVAL, etc., and not
1449 * applied a scale factor when loading the UF buffer, however, changing
1450 * BADVAL and scaling everything was more general.
1452 * 6. Made some slight modifications to the Radar header and Volume header.
1454 *-------------------------------------------------------------------------
1455 * v0.6 Began 4/16/94. Froze: 4/30/94.
1459 * 1. Azimuth angles range from -180,180 to 0,360.
1460 * 2. New color index binning function for velocity. -nyquist,nyquist
1461 * using 15 bin values. See Vrebin_velocity_sweep.
1462 * 3. Added the following routines:
1464 * Memory management.
1465 * Ray *Vcopy_ray(Ray *r);
1466 * Sweep *Vcopy_sweep(Sweep *s);
1467 * Volume *Vcopy_volume(Volume *v);
1468 * Radar *clear_radar(Radar *r);
1469 * void Vget_groundr_and_h(float slant_r, float elev, float *gr, float *h);
1470 * void Vget_slantr_and_elev(float gr, float h, float *slant_r, float *elev);
1471 * void Vget_slantr_and_h(float gr, float elev, float *slant_r, float *h);
1473 * Image generation preparation.
1474 * void Vrebin_velocity_ray (Ray *r); /* Modifies r */
1475 * void Vrebin_velocity_sweep (Sweep *s); /* Modifies s */
1476 * void Vrebin_velocity_volume(Volume *v); /* Modifies v */
1478 * Color table functions.
1479 * void load_red_table(char *infile);
1480 * void load_green_table(char *infile);
1481 * void load_blue_table(char *infile);
1483 * 4. Added 4/3Re calculation to Vget_slantr_and_elev and Vget_groundr...
1484 * 5. Checked for null in the Vclear routines.
1486 *-------------------------------------------------------------------------
1491 * 1. Color table functions taken out of the image routines.
1492 * You must call load_refl_table(), load_vel_table(), load_sw_table()
1493 * to load the appropriate color table before making color images.
1494 * There are seperate color tables for R, V, S. See volume.h.
1496 * 2. Range is now used in Vsweep_to_cart.
1497 * 3. Gate size (pixel resolution in km) is now used.
1498 * 4. Added range to cappi_at_h function. It is the effective range.
1499 * 5. Added the following routines:
1501 * Read radar from disk.
1502 * Ray *read_ray (FILE *fp);
1503 * Sweep *read_sweep (FILE *fp);
1504 * Volume *read_volume(FILE *fp);
1505 * Radar *read_radar (char *infile);
1507 * Write radar to disk
1508 * int write_ray (Ray *r, FILE *fp);
1509 * int write_sweep (Sweep *s, FILE *fp);
1510 * int write_volume(Volume *v, FILE *fp);
1511 * int write_radar (Radar *r, char *outfile);
1514 * float Varea_of_ray(Ray *r, float lo, float hi, float range);
1515 * float Vfractional_area_of_sweep(Sweep *s, float lo, float hi, float range);
1518 * Vfraction_of_ray(Ray *r, float lo, float hi, float range);
1519 * Vfraction_of_sweep(Sweep *s, float lo, float hi, float range);
1520 * Vfraction_of_volume(Volume *v, float lo, float hi, float range);
1523 * 6. radar.c calls wsr88d_get_site to get additional wsr88d information
1524 * not included in the file. Routines compliments of Dan Austin.
1525 * 7. Added RFVAL. Range Folded value. Any base data value of 0 is
1526 * data below SNR thresholds set for that specific base data. Any
1527 * data value of 1 is data considered range ambiguous (folded).
1528 * A color table entry needs to be picked to represent this value.
1531 * o I have to do something about MAX_RADAR_VOLUMES. We really should
1532 * rely on radar->h.nvolumes;
1534 * o Add 4/3Rearth calculation to get value routines.
1535 * o Incorporate nsig_to_radar. Dennis Flanigan is writing that interface.
1536 * o Add fraction of area function.
1537 * o Add the following functions: ??? really ???
1538 * Sweep *Vget_closest_sweep(Volume *v, float elev);
1539 * Ray *Vget_closest_ray(Sweep *s, float azim);
1540 * float Vget_closest_value_in_beam(Ray *ray, float range);
1541 * float Vget_closest_value(Ray *ray, float range);
1542 * (I'm not sure how this will be different than Vget_value)
1544 * o Sort the rays so locating azimuth is trivial; instead of a search
1545 * algorithm as it is now. Hey, would a binary search be good enough or
1546 * do we need some hashing function? Is the lookup fast enough already?
1547 * o Add CAPPI at h. (Option for bilinear interpolation about h).
1548 *-------------------------------------------------------------------------
1549 * v0.4 Began 3/23/94 Froze: 4/7/94
1553 * 1. Made Sweep (sweep) and Ray (ray) members an array of pointers.
1554 * This changes the syntax of the access to be
1555 * v->sweep[is]->ray[ir]->range[ibin] instead of
1556 * v.sweep[is].ray[ir].range[ibin]. The benifit of this is to
1557 * be able to dynamically specify the number of sweeps or rays,
1558 * even volumes for the Radar structure, and not allocate a maximum.
1559 * This makes Vnew_sweep and Vnew_ray useful.
1561 * 2. Added the following functions:
1562 * Volume *Vget_volume(Radar *r, int itype);
1563 * itype = REFLECTIVITY, VELOCITY, or SPECTRUM_WIDTH, etc.
1565 * Sweep *Vget_sweep(Volume *v, float theta);
1566 * Ray *Vget_ray (Volume *v, float theta, float azimuth);
1567 * float Vget_value(Volume *v, float theta, float azimuth, float range);
1568 * Ray *Vget_ray_from_sweep(Sweep *s, float azimuth, float range);
1569 * float Vget_value_from_sweep(Sweep *s, float azimuth, float range);
1570 * float Vget_value_from_ray(Ray *r, float range);
1571 * float Vget_value_at_h(Volume *v, float azim, float grnd_r, float h);
1573 * Ray *QC_ray (Ray *ray, int radar_type);
1574 * Sweep *QC_sweep (Sweep *sweep, int radar_type);
1575 * Volume *QC_volume(Volume *volume, int radar_type);
1577 * Radar *QC_radar (Radar *radar);
1579 * void write_gif(char *outfile, char *image, int xdim, int ydim, char c_table[256][3]);
1580 * void write_pict(char *outfile, char *image, int xdim, int ydim, char c_table[256][3]);
1581 * char *Vsweep_to_cart(Sweep *s, int xdim, int ydim, float range);
1582 * void Vsweep_to_gif(Sweep *s, char *outfile, int xdim, int ydim, float range);
1583 * void Vsweep_to_pict(Sweep *s, char *outfile, int xdim, int ydim, float range);
1584 * void Vvolume_to_gif(Volume *v, char *basename, int xdim, int ydim, float range);
1585 * char *Vsweep_to_cart(
1586 * 3. When a sweep does not have any rays with any bins, then NULL is
1587 * assigned to that Sweep pointer. This occurs for reflectivity for
1588 * the 2-nd sweep index (as defined by the data) where the is no
1589 * reflectivity data, only doppler and spectrum width. Velocity and
1590 * spectrum width data do not exist for sweep number 1 (index 0).
1592 * 4. Speed ups in Vto_cart_sweep. Math is precomputed and saved in
1593 * arrays for faster lookup. Still the ppmtogif is a snail and it
1594 * overwhelms the runtime. I only saw a 35 second improvment with
1595 * these new arrays when outputting 20 gif images. I think the -O
1596 * compile flag is doing a good job.
1598 * 5. Added CAPPI at h. Routine in cappi.c. Cappi type is syntatically
1599 * identical to the Sweep type.
1601 * Cappi *cappi_at_h(Volume *v, float h);
1603 * 6. Make builds libradar.a which contains radar.c, volume.c, cappi.c and
1604 * image_gen.c. Builds on SGI, SUN and HP.
1606 * 7. Add QC routines. See 2. above for the list. Currently they are
1607 * place holding functions with only QC_ray needing to be coded.
1608 * Paul Kucera will take care of that.
1610 * 8. Improvments to radar.ez and volume.ez.
1613 * o Add the following functions:
1614 * Sweep *Vget_closest_sweep(Volume *v, float elev);
1615 * Ray *Vget_closest_ray(Sweep *s, float azim);
1616 * float Vget_closest_value_in_beam(Ray *ray, float range);
1617 * float Vget_closest_value(Ray *ray, float range);
1618 * (I'm not sure how this will be different than Vget_value)
1620 * o Add range resolution to the image generation subroutines.
1621 * o Add range resolution to all the 'get_value' routines.
1622 * o Sort the rays so locating azimuth is trivial; instead of a search
1623 * algorithm as it is now. Hey, would a binary search be good enough or
1624 * do we need some hashing function? It the lookup fast enough already?
1625 * o Add CAPPI at h. (Option for bilinear interpolation about h).
1627 *-------------------------------------------------------------------------
1628 * v0.3 Began 3/22/94 Froze 3/23/94.
1631 * 1. Implimented the Radar structure. The heart of it is an array of
1633 * 2. Using 'data_mask' which is a bitwise ( | operator in C ) of
1634 * REFL_MASK, VEL_MASK, or SW_MASK, you can get any field type volume:
1635 * reflectivity, doppler velocity, or spectrum width respectively.
1636 * 3. Load volume, sweep and ray header information.
1637 * 4. Added Radar header information; need a good definition of say date and
1641 * - Improve carteasean image generation.
1642 * Input: radar range, pix_width, pix_height. No distortion.
1643 * - Need to specify the output GIF filename as options.
1644 * - Incorporate Vto_fraction (?? name ??) Dave's new function.
1645 *-------------------------------------------------------------------------
1646 * v0.2 Began 3/21/94 Froze 3/22/94.
1648 * I am freezing this here because both BSCAN and CARTESEAN image generation
1649 * works. You have to hand edit the source to restrict the number of
1650 * Sweeps that are converted to images, currently only sweep 0. The inclusion
1651 * of sweep/ray header information and the collection of doppler and spectrum
1652 * width data requires substantial effort and will be in the next version.
1653 * This version freeze is a check point.
1656 * 1. Name rsphere change to volume.
1657 * 2. File rsphere.c changed to volume.c. (Moved the RCS file rsphere.c,v
1658 * to the graveyard directory in RCS/
1659 * 3. Added color gif support. Reads red.clr, green.clr, blue.clr files.
1660 * This renamed the Vto_cart_pgm function to Vto_cart_gif. It is likely
1661 * that ppm support is not needed. We'll see.
1662 * 4. Fixes minor glitches in output images where the tan is undefined.
1663 * 5. Added BSCAN production as GIF files.
1664 * 6. Output sweep.xx file names; sweep.00.gif, etc. and bscan.00.gif too.
1667 * - Add routines to get volumes for doppler and spectrum width. (Radar lib?)
1668 * - Improve carteasean image generation.
1669 * Input: radar range, pix_width, pix_height. No distortion.
1670 * - Add sweep header information.
1671 * - Need to specify the output GIF filename as options.
1672 * - Incorporate Vto_fraction (?? name ??) Dave's new function.
1674 *-------------------------------------------------------------------------
1675 *v0.1 3/21/94 by John Merritt.
1676 * 1. First development version of the radar and rsphere library.
1677 * Includes test driver. radar.ez and rsphere.ez document the
1678 * functionality of the programs. This version exists to check point
1680 *-------------------------------------------------------------------------