int uf_into_radar(UF_buffer uf, Radar **the_radar)
{
/* Missing data flag : -32768 when a signed short. */
#define UF_NO_DATA 0X8000
/* Any convensions may be observed, however, Radial Velocity must be VE. */
/* Typically:
* DM = Reflectivity (dB(mW)).
* DZ = Reflectivity (dBZ).
* VR = Radial Velocity.
* CZ = Corrected Reflectivity. (Quality controlled: AP removed, etc.)
* SW = Spectrum Width.
* DR = Differential Reflectivity.
* XZ = X-band Reflectivity.
*
* These fields may appear in any order in the UF file.
*
* RETURN:
* UF_DONE if we're done with the UF ingest.
* UF_MORE if we need more UF data.
*/
/* These are pointers to various locations within the UF buffer 'uf'.
* They are used to index the different components of the UF structure in
* a manor consistant with the UF documentation. For instance, uf_ma[1]
* will be equivalenced to the second word (2 bytes/each) of the UF
* buffer.
*/
short *uf_ma; /* Mandatory header block. */
short *uf_lu; /* Local Use header block. */
short *uf_dh; /* Data header. */
short *uf_fh; /* Field header. */
short *uf_data; /* Data. */
/* The length of each header. */
int len_data, len_lu;
int current_fh_index;
float scale_factor;
int nfields, isweep, ifield, iray, i, m;
static int pulled_time_from_first_ray = 0;
char *field_type; /* For printing the field type upon error. */
short proj_name[4];
Ray *ray;
Sweep *sweep;
Radar *radar;
float x;
short missing_data;
Volume *new_volume;
int nbins;
extern int rsl_qfield[];
extern int *rsl_qsweep; /* See RSL_read_these_sweeps in volume.c */
extern int rsl_qsweep_max;
radar = *the_radar;
/*
* The organization of the Radar structure is by volumes, then sweeps, then
* rays, then gates. This is different from the UF file organization.
* The UF format is sweeps, rays, then gates for all field types (volumes).
*/
/* Set up all the UF pointers. */
uf_ma = uf;
uf_lu = uf + uf_ma[3] - 1;
uf_dh = uf + uf_ma[4] - 1;
nfields = uf_dh[0];
isweep = uf_ma[9] - 1;
if (rsl_qsweep != NULL) {
if (isweep > rsl_qsweep_max) return UF_DONE;
if (rsl_qsweep[isweep] == 0) return UF_MORE;
}
/* Here is a sticky part. We must make sure that if we encounter any
* additional fields that were not previously present, that we are able
* to load them. This will require us to copy the entire radar structure
* and whack off the old one. But, we must be sure that it really is a
* new field. This is not so trivial as a couple of lines of code; I will
* have to think about this a little bit more. See STICKYSOLVED below.
*/
#ifdef STICKYSOLVED
if (radar == NULL) radar = RSL_new_radar(nfields);
/* Sticky solution here. */
#else
if (radar == NULL) {
radar = RSL_new_radar(MAX_RADAR_VOLUMES);
*the_radar = radar;
pulled_time_from_first_ray = 0;
for (i=0; i<MAX_RADAR_VOLUMES; i++)
if (rsl_qfield[i]) /* See RSL_select_fields in volume.c */
radar->v[i] = RSL_new_volume(20);
}
#endif
/* For LITTLE ENDIAN:
* WE "UNSWAP" character strings. Because there are so few of them,
* it is easier to catch them here. The entire UF buffer is swapped prior
* to entry to here, therefore, undo-ing these swaps; sets the
* character strings right.
*/
for (i=0; i<nfields; i++) {
if (little_endian()) swap_2_bytes(&uf_dh[3+2*i]); /* Unswap. */
if (strncmp((char *)&uf_dh[3+2*i], "DZ", 2) == 0) ifield = DZ_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "VR", 2) == 0) ifield = VR_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "SW", 2) == 0) ifield = SW_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "CZ", 2) == 0) ifield = CZ_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "UZ", 2) == 0) ifield = ZT_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "ZT", 2) == 0) ifield = ZT_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "DR", 2) == 0) ifield = DR_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "ZD", 2) == 0) ifield = ZD_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "DM", 2) == 0) ifield = DM_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "RH", 2) == 0) ifield = RH_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "PH", 2) == 0) ifield = PH_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "XZ", 2) == 0) ifield = XZ_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "CD", 2) == 0) ifield = CD_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "MZ", 2) == 0) ifield = MZ_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "MD", 2) == 0) ifield = MD_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "ZE", 2) == 0) ifield = ZE_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "VE", 2) == 0) ifield = VE_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "KD", 2) == 0) ifield = KD_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "TI", 2) == 0) ifield = TI_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "DX", 2) == 0) ifield = DX_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "CH", 2) == 0) ifield = CH_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "AH", 2) == 0) ifield = AH_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "CV", 2) == 0) ifield = CV_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "AV", 2) == 0) ifield = AV_INDEX;
else if (strncmp((char *)&uf_dh[3+2*i], "SQ", 2) == 0) ifield = SQ_INDEX;
else { /* etc. DON'T know how to handle this yet. */
field_type = (char *)&uf_dh[3+2*i];
fprintf(stderr, "Unknown field type %c%c\n", (char)field_type[0], (char)field_type[1]);
continue;
}
switch (ifield) {
case DZ_INDEX: f = DZ_F; invf = DZ_INVF; break;
case VR_INDEX: f = VR_F; invf = VR_INVF; break;
case SW_INDEX: f = SW_F; invf = SW_INVF; break;
case CZ_INDEX: f = CZ_F; invf = CZ_INVF; break;
case ZT_INDEX: f = ZT_F; invf = ZT_INVF; break;
case DR_INDEX: f = DR_F; invf = DR_INVF; break;
case ZD_INDEX: f = ZD_F; invf = ZD_INVF; break;
case DM_INDEX: f = DM_F; invf = DM_INVF; break;
case RH_INDEX: f = RH_F; invf = RH_INVF; break;
case PH_INDEX: f = PH_F; invf = PH_INVF; break;
case XZ_INDEX: f = XZ_F; invf = XZ_INVF; break;
case CD_INDEX: f = CD_F; invf = CD_INVF; break;
case MZ_INDEX: f = MZ_F; invf = MZ_INVF; break;
case MD_INDEX: f = MD_F; invf = MD_INVF; break;
case ZE_INDEX: f = ZE_F; invf = ZE_INVF; break;
case VE_INDEX: f = VE_F; invf = VE_INVF; break;
case KD_INDEX: f = KD_F; invf = KD_INVF; break;
case TI_INDEX: f = TI_F; invf = TI_INVF; break;
case DX_INDEX: f = DX_F; invf = DX_INVF; break;
case CH_INDEX: f = CH_F; invf = CH_INVF; break;
case AH_INDEX: f = AH_F; invf = AH_INVF; break;
case CV_INDEX: f = CV_F; invf = CV_INVF; break;
case AV_INDEX: f = AV_F; invf = AV_INVF; break;
case SQ_INDEX: f = SQ_F; invf = SQ_INVF; break;
default: f = DZ_F; invf = DZ_INVF; break;
}
/* Do we place the data into this volume? */
if (radar->v[ifield] == NULL) continue; /* Nope. */
if (isweep >= radar->v[ifield]->h.nsweeps) { /* Exceeded sweep limit.
* Allocate more sweeps.
* Copy all previous sweeps.
*/
if (radar_verbose_flag)
fprintf(stderr,"Exceeded sweep allocation of %d. Adding 20 more.\n", isweep);
new_volume = RSL_new_volume(radar->v[ifield]->h.nsweeps+20);
new_volume = copy_sweeps_into_volume(new_volume, radar->v[ifield]);
radar->v[ifield] = new_volume;
}
if (radar->v[ifield]->sweep[isweep] == NULL) {
if (radar_verbose_flag)
fprintf(stderr,"Allocating new sweep for field %d, isweep %d\n", ifield, isweep);
radar->v[ifield]->sweep[isweep] = RSL_new_sweep(1000);
radar->v[ifield]->sweep[isweep]->h.nrays = 0; /* Increment this for each
* ray encountered.
*/
radar->v[ifield]->h.f = f;
radar->v[ifield]->h.invf = invf;
radar->v[ifield]->sweep[isweep]->h.f = f;
radar->v[ifield]->sweep[isweep]->h.invf = invf;
radar->v[ifield]->sweep[isweep]->h.sweep_num = uf_ma[9];
radar->v[ifield]->sweep[isweep]->h.elev = uf_ma[35] / 64.0;
}
current_fh_index = uf_dh[4+2*i];
uf_fh = uf + current_fh_index - 1;
sweep = radar->v[ifield]->sweep[isweep];
iray = sweep->h.nrays;
nbins = uf_fh[5];
radar->v[ifield]->sweep[isweep]->ray[iray] = RSL_new_ray(nbins);
ray = radar->v[ifield]->sweep[isweep]->ray[iray];
sweep->h.nrays += 1;
if (ray) {
/*
* ---- Beginning of MANDATORY HEADER BLOCK.
*/
ray->h.ray_num = uf_ma[7];
if (little_endian()) swap2(&uf_ma[10], 8);
memcpy(radar->h.radar_name, &uf_ma[10], 8);
if (little_endian()) swap2(&uf_ma[10], 8/2);
memcpy(radar->h.name, &uf_ma[14], 8);
if (little_endian()) swap2(&uf_ma[14], 8/2);
/* All components of lat/lon are the same sign. If not, then
* what ever wrote the UF was in error. A simple RSL program
* can repair the damage, however, not here.
*/
ray->h.lat = uf_ma[18] + uf_ma[19]/60.0 + uf_ma[20]/64.0/3600;
ray->h.lon = uf_ma[21] + uf_ma[22]/60.0 + uf_ma[23]/64.0/3600;
ray->h.alt = uf_ma[24];
ray->h.year = uf_ma[25];
if (ray->h.year < 1900) {
ray->h.year += 1900;
if (ray->h.year < 1980) ray->h.year += 100; /* Year >= 2000. */
}
ray->h.month = uf_ma[26];
ray->h.day = uf_ma[27];
ray->h.hour = uf_ma[28];
ray->h.minute = uf_ma[29];
ray->h.sec = uf_ma[30];
ray->h.azimuth = uf_ma[32] / 64.0;
/* If Local Use Header is present and contains azimuth, use that
* azimuth for VR and SW. This is for WSR-88D, which runs separate
* scans for DZ and VR/SW at the lower elevations, which means DZ
* VR/SW and have different azimuths in the "same" ray.
*/
len_lu = uf_ma[4] - uf_ma[3];
if (len_lu == 2 && (ifield == VR_INDEX || ifield == SW_INDEX)) {
if (strncmp(uf_lu,"ZA",2) == 0 || strncmp(uf_lu,"AZ",2) == 0)
ray->h.azimuth = uf_lu[1] / 64.0;
}
if (ray->h.azimuth < 0.) ray->h.azimuth += 360.; /* make it 0 to 360. */
ray->h.elev = uf_ma[33] / 64.0;
ray->h.elev_num = sweep->h.sweep_num;
ray->h.fix_angle = sweep->h.elev = uf_ma[35] / 64.0;
ray->h.azim_rate = uf_ma[36] / 64.0;
ray->h.sweep_rate = ray->h.azim_rate * (60.0/360.0);
missing_data = uf_ma[44];
if (pulled_time_from_first_ray == 0) {
radar->h.height = uf_ma[24];
radar->h.latd = uf_ma[18];
radar->h.latm = uf_ma[19];
radar->h.lats = uf_ma[20] / 64.0;
radar->h.lond = uf_ma[21];
radar->h.lonm = uf_ma[22];
radar->h.lons = uf_ma[23] / 64.0;
radar->h.year = ray->h.year;
radar->h.month = ray->h.month;
radar->h.day = ray->h.day;
radar->h.hour = ray->h.hour;
radar->h.minute = ray->h.minute;
radar->h.sec = ray->h.sec;
strcpy(radar->h.radar_type, "uf");
pulled_time_from_first_ray = 1;
}
/*
* ---- End of MANDATORY HEADER BLOCK.
*/
/* ---- Optional header used for MCTEX files. */
/* If this is a MCTEX file, the first 4 words following the
mandatory header contain the string 'MCTEX'. */
memcpy(proj_name, (short *)(uf + uf_ma[2] - 1), 8);
if (little_endian()) swap2(proj_name, 4);
/* ---- Local Use Header (if present) was checked during Mandatory
* Header processing above.
*/
/* ---- Begining of FIELD HEADER. */
uf_fh = uf+current_fh_index - 1;
scale_factor = uf_fh[1];
ray->h.range_bin1 = uf_fh[2] * 1000.0 + uf_fh[3];
ray->h.gate_size = uf_fh[4];
ray->h.nbins = uf_fh[5];
ray->h.pulse_width = uf_fh[6]/(RSL_SPEED_OF_LIGHT/1.0e6);
if (strncmp((char *)proj_name, "MCTEX", 5) == 0) /* MCTEX? */
{
/* The beamwidth values are not correct in Mctex UF files. */
ray->h.beam_width = 1.0;
sweep->h.beam_width = ray->h.beam_width;
sweep->h.horz_half_bw = ray->h.beam_width/2.0;
sweep->h.vert_half_bw = ray->h.beam_width/2.0;
}
else /* Not MCTEX */
{
ray->h.beam_width = uf_fh[7] / 64.0;
sweep->h.beam_width = uf_fh[7] / 64.0;
sweep->h.horz_half_bw = uf_fh[7] / 128.0; /* DFF 4/4/95 */
sweep->h.vert_half_bw = uf_fh[8] / 128.0; /* DFF 4/4/95 */
}
/* fprintf (stderr, "uf_fh[7] = %d, [8] = %d\n", (int)uf_fh[7], (int)uf_fh[8]); */
if((int)uf_fh[7] == -32768) {
ray->h.beam_width = 1;
sweep->h.beam_width = 1;
sweep->h.horz_half_bw = .5;
sweep->h.vert_half_bw = .5;
}
ray->h.frequency = uf_fh[9] / 64.0;
ray->h.wavelength = uf_fh[11] / 64.0 / 100.0; /* cm to m. */
ray->h.pulse_count = uf_fh[12];
if (ifield == DZ_INDEX || ifield == ZT_INDEX) {
radar->v[ifield]->h.calibr_const = uf_fh[16] / 100.0;
/* uf value scaled by 100 */
}
else {
radar->v[ifield]->h.calibr_const = 0.0;
}
if (uf_fh[17] == (short)UF_NO_DATA) x = 0;
else x = uf_fh[17] / 1000000.0; /* PRT in seconds. */
if (x != 0) {
ray->h.prf = 1/x;
ray->h.unam_rng = RSL_SPEED_OF_LIGHT / (2.0 * ray->h.prf * 1000.0);
}
else {
ray->h.prf = 0.0;
ray->h.unam_rng = 0.0;
}
if (VR_INDEX == ifield || VE_INDEX == ifield) {
ray->h.nyq_vel = uf_fh[19] / scale_factor;
}
/* ---- End of FIELD HEADER. */
ray->h.f = f;
ray->h.invf = invf;
/* ---- Begining of FIELD DATA. */
uf_data = uf+uf_fh[0] - 1;
len_data = ray->h.nbins; /* Known because of RSL_new_ray. */
for (m=0; m<len_data; m++) {
if (uf_data[m] == (short)UF_NO_DATA)
ray->range[m] = invf(BADVAL); /* BADVAL */
else {
if(uf_data[m] == missing_data)
ray->range[m] = invf(NOECHO); /* NOECHO */
else
ray->range[m] = invf((float)uf_data[m]/scale_factor);
}
}
}
}
return UF_MORE;
}
Radar *RSL_wsr88d_to_radar(char *infile, char *call_or_first_tape_file)
/*
* Gets all volumes from the nexrad file. Input file is 'infile'.
* Site information is extracted from 'call_or_first_tape_file'; this
* is typically a disk file called 'nex.file.1'.
*
* -or-
*
* Uses the string in 'call_or_first_tape_file' as the 4 character call sign
* for the sight. All UPPERCASE characters. Normally, this call sign
* is extracted from the file 'nex.file.1'.
*
* Returns a pointer to a Radar structure; that contains the different
* Volumes of data.
*/
{
Radar *radar;
Volume *new_volume;
Wsr88d_file *wf;
Wsr88d_sweep wsr88d_sweep;
Wsr88d_file_header wsr88d_file_header;
Wsr88d_tape_header wsr88d_tape_header;
int n;
int nsweep;
int i;
int iv;
int nvolumes;
int volume_mask[] = {WSR88D_DZ, WSR88D_VR, WSR88D_SW};
char *field_str[] = {"Reflectivity", "Velocity", "Spectrum width"};
Wsr88d_site_info *sitep;
char site_id_str[5];
char *the_file;
int expected_msgtype = 0;
char version[8];
extern int rsl_qfield[]; /* See RSL_select_fields in volume.c */
extern int *rsl_qsweep; /* See RSL_read_these_sweeps in volume.c */
extern int rsl_qsweep_max;
Radar *load_wsr88d_m31_into_radar(Wsr88d_file *wf);
sitep = NULL;
/* Determine the site quasi automatically. Here is the procedure:
* 1. Determine if we have a call sign.
* 2. Try reading 'call_or_first_tape_file' from disk. This is done via
* wsr88d_read_tape_header.
* 3. If no valid site info, abort.
*/
if (call_or_first_tape_file == NULL) {
fprintf(stderr, "wsr88d_to_radar: No valid site ID info provided.\n");
return(NULL);
} else if (strlen(call_or_first_tape_file) == 4)
sitep = wsr88d_get_site(call_or_first_tape_file);
else if (strlen(call_or_first_tape_file) == 0) {
fprintf(stderr, "wsr88d_to_radar: No valid site ID info provided.\n");
return(NULL);
}
if (sitep == NULL)
if (wsr88d_read_tape_header(call_or_first_tape_file, &wsr88d_tape_header) > 0) {
memcpy(site_id_str, wsr88d_tape_header.site_id, 4);
sitep = wsr88d_get_site(site_id_str);
}
if (sitep == NULL) {
fprintf(stderr,"wsr88d_to_radar: No valid site ID info found.\n");
return(NULL);
}
if (radar_verbose_flag)
fprintf(stderr,"SITE: %c%c%c%c\n", sitep->name[0], sitep->name[1],
sitep->name[2], sitep->name[3]);
memset(&wsr88d_sweep, 0, sizeof(Wsr88d_sweep)); /* Initialize to 0 a
* heavily used variable.
*/
/* 1. Open the input wsr88d file. */
if (infile == NULL) the_file = "stdin"; /* wsr88d.c understands this to
* mean read from stdin.
*/
else the_file = infile;
if ((wf = wsr88d_open(the_file)) == NULL) {
wsr88d_perror(the_file);
return NULL;
}
/* 2. Read wsr88d headers. */
/* Return # bytes, 0 or neg. on fail. */
n = wsr88d_read_file_header(wf, &wsr88d_file_header);
/*
* Get the expected digital radar message type based on version string
* from the Archive II header. The message type is 31 for Build 10, and 1
* for prior builds. Note that we consider AR2V0001 to be message type 1,
* because it has been in the past, but with Build 10 this officially
* becomes the version number for Evansville (KVWX), which will use message
* type 31. This could be a problem if RSL is used to process KVWX.
*/
if (n > 0) {
strncpy(version, wsr88d_file_header.title.filename, 8);
if (strncmp(version,"AR2V0004",8) == 0 ||
strncmp(version,"AR2V0003",8) ==0 ||
strncmp(version,"AR2V0002",8) == 0) {
expected_msgtype = 31;
}
else if (strncmp(version,"ARCHIVE2",8) == 0 ||
strncmp(version,"AR2V0001",8) == 0) {
expected_msgtype = 1;
}
}
if (n <= 0 || expected_msgtype == 0) {
fprintf(stderr,"RSL_wsr88d_to_radar: ");
if (n <= 0)
fprintf(stderr,"wsr88d_read_file_header failed\n");
else
fprintf(stderr,"Archive II header contains unknown version "
": '%s'\n", version);
wsr88d_close(wf);
free(radar);
return NULL;
}
if (radar_verbose_flag)
print_head(wsr88d_file_header);
if (expected_msgtype == 31) {
/* Get radar for message type 31. */
nvolumes = 6;
radar = load_wsr88d_m31_into_radar(wf);
if (radar == NULL) return NULL;
}
else {
/* Get radar for message type 1. */
nvolumes = 3;
/* Allocate all Volume pointers. */
radar = RSL_new_radar(MAX_RADAR_VOLUMES);
if (radar == NULL) return NULL;
/* Clear the sweep pointers. */
clear_sweep(&wsr88d_sweep, 0, MAX_RAYS_IN_SWEEP);
/* Allocate a maximum of 30 sweeps for the volume. */
/* Order is important. WSR88D_DZ, WSR88D_VR, WSR88D_SW, is
* assigned to the indexes DZ_INDEX, VR_INDEX and SW_INDEX respectively.
*/
for (iv=0; iv<nvolumes; iv++)
if (rsl_qfield[iv]) radar->v[iv] = RSL_new_volume(20);
/* LOOP until EOF */
nsweep = 0;
for (;(n = wsr88d_read_sweep(wf, &wsr88d_sweep)) > 0; nsweep++) {
if (rsl_qsweep != NULL) {
if (nsweep > rsl_qsweep_max) break;
if (rsl_qsweep[nsweep] == 0) continue;
}
if (radar_verbose_flag)
fprintf(stderr,"Processing for SWEEP # %d\n", nsweep);
/* wsr88d_print_sweep_info(&wsr88d_sweep); */
for (iv=0; iv<nvolumes; iv++) {
if (rsl_qfield[iv]) {
/* Exceeded sweep limit.
* Allocate more sweeps.
* Copy all previous sweeps.
*/
if (nsweep >= radar->v[iv]->h.nsweeps) {
if (radar_verbose_flag)
fprintf(stderr,"Exceeded sweep allocation of %d. "
"Adding 20 more.\n", nsweep);
new_volume = RSL_new_volume(radar->v[iv]->h.nsweeps+20);
new_volume = copy_sweeps_into_volume(new_volume, radar->v[iv]);
radar->v[iv] = new_volume;
}
if (wsr88d_load_sweep_into_volume(wsr88d_sweep,
radar->v[iv], nsweep, volume_mask[iv]) != 0) {
RSL_free_radar(radar);
return NULL;
}
}
}
if (nsweep == 0) {
/* Get Volume Coverage Pattern number for radar header. */
i=0;
while (i < MAX_RAYS_IN_SWEEP && wsr88d_sweep.ray[i] == NULL) i++;
if (i < MAX_RAYS_IN_SWEEP) radar->h.vcp = wsr88d_get_volume_coverage(
wsr88d_sweep.ray[i]);
}
free_and_clear_sweep(&wsr88d_sweep, 0, MAX_RAYS_IN_SWEEP);
}
for (iv=0; iv<nvolumes; iv++) {
if (rsl_qfield[iv]) {
radar->v[iv]->h.type_str = strdup(field_str[iv]);
radar->v[iv]->h.nsweeps = nsweep;
}
}
}
wsr88d_close(wf);
/*
* Here we will assign the Radar_header information. Take most of it
* from an existing volume's header.
*/
radar_load_date_time(radar); /* Magic :-) */
radar->h.number = sitep->number;
memcpy(&radar->h.name, sitep->name, sizeof(sitep->name));
memcpy(&radar->h.radar_name, sitep->name, sizeof(sitep->name)); /* Redundant */
memcpy(&radar->h.city, sitep->city, sizeof(sitep->city));
memcpy(&radar->h.state, sitep->state, sizeof(sitep->state));
strcpy(radar->h.radar_type, "wsr88d");
radar->h.latd = sitep->latd;
radar->h.latm = sitep->latm;
radar->h.lats = sitep->lats;
if (radar->h.latd < 0) { /* Degree/min/sec all the same sign */
radar->h.latm *= -1;
radar->h.lats *= -1;
}
radar->h.lond = sitep->lond;
radar->h.lonm = sitep->lonm;
radar->h.lons = sitep->lons;
if (radar->h.lond < 0) { /* Degree/min/sec all the same sign */
radar->h.lonm *= -1;
radar->h.lons *= -1;
}
radar->h.height = sitep->height;
radar->h.spulse = sitep->spulse;
radar->h.lpulse = sitep->lpulse;
radar = RSL_prune_radar(radar);
return radar;
}
Radar *RSL_wsr88d_to_radar(char *infile, char *call_or_first_tape_file)
/*
* Gets all volumes from the nexrad file. Input file is 'infile'.
* Site information is extracted from 'call_or_first_tape_file'; this
* is typically a disk file called 'nex.file.1'.
*
* -or-
*
* Uses the string in 'call_or_first_tape_file' as the 4 character call sign
* for the sight. All UPPERCASE characters. Normally, this call sign
* is extracted from the file 'nex.file.1'.
*
* Returns a pointer to a Radar structure; that contains the different
* Volumes of data.
*/
{
Radar *radar;
Volume *new_volume;
Wsr88d_file *wf;
Wsr88d_sweep wsr88d_sweep;
Wsr88d_file_header wsr88d_file_header;
Wsr88d_tape_header wsr88d_tape_header;
int n;
int nsweep;
int iv;
int nvolumes;
int volume_mask[] = {WSR88D_DZ, WSR88D_VR, WSR88D_SW};
char *field_str[] = {"Reflectivity", "Velocity", "Spectrum width"};
Wsr88d_site_info *sitep;
char site_id_str[5], failid[]="KFTG";
char *the_file;
extern int rsl_qfield[]; /* See RSL_select_fields in volume.c */
extern int *rsl_qsweep; /* See RSL_read_these_sweeps in volume.c */
extern int rsl_qsweep_max;
/* initialize site id to a failsafe value */
wsr88d_set_station_id(failid, -9999.0, -9999.0, -9999.0);
sitep = NULL;
/* Determine the site quasi automatically. Here is the procedure:
* 1. Determine if we have a call sign.
* 2. Try reading 'call_or_first_tape_file' from disk. This is done via
* wsr88d_read_tape_header.
* 3. If no valid site info, abort.
*/
if (call_or_first_tape_file == NULL) {
fprintf(stderr, "wsr88d_to_radar: No valid site ID info provided.\n");
return(NULL);
} else if (strlen(call_or_first_tape_file) == 4)
sitep = wsr88d_get_site(call_or_first_tape_file);
else if (strlen(call_or_first_tape_file) < 3) {
/*fprintf(stderr, "wsr88d_to_radar: No valid site ID info provided, using default.\n");
strcpy(site_id_str,failid);
sitep = wsr88d_get_site(site_id_str); -*enough for now. Message 31 contains ICAO and lat/lon */
/*return(NULL);*/
}
if (sitep == NULL)
if (wsr88d_read_tape_header(call_or_first_tape_file, &wsr88d_tape_header) > 0) {
memcpy(site_id_str, wsr88d_tape_header.site_id, 4);
sitep = wsr88d_get_site(site_id_str);
}
/*if (sitep == NULL) {
fprintf(stderr,"wsr88d_to_radar: No valid site ID info found.\n");
return(NULL);
}
if (radar_verbose_flag)
fprintf(stderr,"SITE: %c%c%c%c\n", sitep->name[0], sitep->name[1],
sitep->name[2], sitep->name[3]);*/
memset(&wsr88d_sweep, 0, sizeof(Wsr88d_sweep)); /* Initialize to 0 a
* heavily used variable.
*/
/* 1. Open the input wsr88d file. */
if (infile == NULL) the_file = "stdin"; /* wsr88d.c understands this to
* mean read from stdin.
*/
else the_file = infile;
if ((wf = wsr88d_open(the_file)) == NULL) {
wsr88d_perror(the_file);
return NULL;
}
nvolumes = 3;
radar = RSL_new_radar(MAX_RADAR_VOLUMES); /* Allocate all Volume pointers. */
if (radar == NULL) return NULL;
/* 2. Read wsr88d headers. */
/* Return # bytes, 0 or neg. on fail. */
n = wsr88d_read_file_header(wf, &wsr88d_file_header);
if (n <= 0 ||
(strncmp(wsr88d_file_header.title.filename, "ARCHIVE2.", 9) != 0 &&
strncmp(wsr88d_file_header.title.filename, "AR2V000", 7) != 0))
{
wsr88d_close(wf);
free(radar);
return NULL;
}
if (radar_verbose_flag)
print_head(wsr88d_file_header);
/* Clear the sweep pointers. */
clear_sweep(&wsr88d_sweep, 0, MAX_RAYS_IN_SWEEP);
/* Allocate a maximum of 30 sweeps for the volume. */
/* Order is important. WSR88D_DZ, WSR88D_VR, WSR88D_SW, is
* assigned to the indexes DZ_INDEX, VR_INDEX and SW_INDEX respectively.
*/
for (iv=0; iv<nvolumes; iv++)
if (rsl_qfield[iv]) radar->v[iv] = RSL_new_volume(20);
/* LOOP until EOF */
nsweep = 0;
for (;(n = wsr88d_read_sweep(wf, &wsr88d_sweep)) > 0; nsweep++) {
if (rsl_qsweep != NULL) {
if (nsweep > rsl_qsweep_max) break;
if (rsl_qsweep[nsweep] == 0) continue;
}
if (radar_verbose_flag)
fprintf(stderr,"Processing for SWEEP # %d\n", nsweep);
/* wsr88d_print_sweep_info(&wsr88d_sweep); */
for (iv=0; iv<nvolumes; iv++) {
if (rsl_qfield[iv]) {
if (nsweep >= radar->v[iv]->h.nsweeps) { /* Exceeded sweep limit.
* Allocate more sweeps.
* Copy all previous sweeps.
*/
if (radar_verbose_flag)
fprintf(stderr,"Exceeded sweep allocation of %d. Adding 20 more.\n", nsweep);
new_volume = RSL_new_volume(radar->v[iv]->h.nsweeps+20);
new_volume = copy_sweeps_into_volume(new_volume, radar->v[iv]);
radar->v[iv] = new_volume;
}
if (wsr88d_load_sweep_into_volume(wsr88d_sweep,
radar->v[iv], nsweep,
volume_mask[iv] ) != 0) {
RSL_free_radar(radar);
return NULL;
}
}
}
free_and_clear_sweep(&wsr88d_sweep, 0, MAX_RAYS_IN_SWEEP);
}
for (iv=0; iv<nvolumes; iv++) {
if (rsl_qfield[iv]) {
radar->v[iv]->h.type_str = strdup(field_str[iv]);
radar->v[iv]->h.nsweeps = nsweep;
}
}
wsr88d_close(wf);
/*
* Here we will assign the Radar_header information. Take most of it
* from an existing volume's header.
*/
/* set the sitep info from level2 info, message31 if present (TODO) */
if ( sitep == NULL ) {
float mess31_lat, mess31_lon, mess31_elev;
float dms;
wsr88d_get_station_id(site_id_str, &mess31_lat, &mess31_lon, &mess31_elev);
sitep = wsr88d_get_site(site_id_str);
mess31_lon = mess31_lon * -1.0;
if ( sitep == NULL ) {
printf("setting site information to ID %s lat %f lon %f elev %f\n",
site_id_str, mess31_lat, mess31_lon, mess31_elev);
sitep = (Wsr88d_site_info *)malloc(sizeof(Wsr88d_site_info));
sitep->number = -9999;
sprintf(sitep->name,"%s\0",site_id_str);
sprintf(sitep->city,"--\0");
sprintf(sitep->state,"--\0");
dms = fabs(mess31_lat);
sitep->latd = floor(dms);
dms = (dms - (float)sitep->latd)*60;
sitep->latm = floor(dms);
dms = (dms - (float)sitep->latm)*60;
sitep->lats = floor(dms);
dms = fabs(mess31_lon);
sitep->lond = floor(dms);
dms = (dms - (float)sitep->lond)*60;
sitep->lonm = floor(dms);
dms = (dms - (float)sitep->lonm)*60;
sitep->lons = floor(dms);
if ( mess31_lat < 0 ) {
sitep->latd *= -1;
sitep->latm *= -1;
sitep->lats *= -1;
}
if ( mess31_lon < 0 ) {
sitep->lond *= -1;
sitep->lonm *= -1;
sitep->lons *= -1;
}
sitep->height = (int)mess31_elev;
sitep->bwidth = -9999;
sitep->spulse = 1530;
sitep->lpulse = 4630;
}
}
radar_load_date_time(radar); /* Magic :-) */
radar->h.number = sitep->number;
memcpy(&radar->h.name, sitep->name, sizeof(sitep->name));
memcpy(&radar->h.radar_name, sitep->name, sizeof(sitep->name)); /* Redundant */
memcpy(&radar->h.city, sitep->city, sizeof(sitep->city));
memcpy(&radar->h.state, sitep->state, sizeof(sitep->state));
strcpy(radar->h.radar_type, "wsr88d");
radar->h.latd = sitep->latd;
radar->h.latm = sitep->latm;
radar->h.lats = sitep->lats;
if (radar->h.latd < 0) { /* Degree/min/sec all the same sign */
radar->h.latm *= -1;
radar->h.lats *= -1;
}
radar->h.lond = sitep->lond;
radar->h.lonm = sitep->lonm;
radar->h.lons = sitep->lons;
if (radar->h.lond < 0) { /* Degree/min/sec all the same sign */
radar->h.lonm *= -1;
radar->h.lons *= -1;
}
radar->h.height = sitep->height;
radar->h.spulse = sitep->spulse;
radar->h.lpulse = sitep->lpulse;
free(sitep);
radar = RSL_prune_radar(radar);
return radar;
}
