| 1 |
greg |
2.2 |
#ifndef lint |
| 2 |
|
|
static const char RCSid[] = "$Id$"; |
| 3 |
|
|
#endif |
| 4 |
|
|
/* Main function for generating spectral sky */ |
| 5 |
|
|
/* Cloudy sky computed as weight average of clear and cie overcast sky */ |
| 6 |
greg |
2.1 |
|
| 7 |
greg |
2.2 |
#include "atmos.h" |
| 8 |
greg |
2.1 |
#include "copyright.h" |
| 9 |
|
|
#include "resolu.h" |
| 10 |
greg |
2.2 |
#include "rtio.h" |
| 11 |
greg |
2.1 |
#include "view.h" |
| 12 |
greg |
2.2 |
#include <ctype.h> |
| 13 |
|
|
#ifdef _WIN32 |
| 14 |
|
|
#include <windows.h> |
| 15 |
|
|
#else |
| 16 |
|
|
#include <errno.h> |
| 17 |
|
|
#include <sys/stat.h> |
| 18 |
|
|
#include <sys/types.h> |
| 19 |
|
|
#endif |
| 20 |
greg |
2.1 |
|
| 21 |
|
|
char *progname; |
| 22 |
|
|
|
| 23 |
|
|
const double ARCTIC_LAT = 67.; |
| 24 |
|
|
const double TROPIC_LAT = 23.; |
| 25 |
|
|
const int SUMMER_START = 4; |
| 26 |
|
|
const int SUMMER_END = 9; |
| 27 |
|
|
const double GNORM = 0.777778; |
| 28 |
|
|
|
| 29 |
|
|
const double D65EFF = 203.; /* standard illuminant D65 */ |
| 30 |
|
|
|
| 31 |
greg |
2.2 |
/* Mean normalized relative daylight spectra where CCT = 6415K for overcast; */ |
| 32 |
greg |
2.1 |
const double D6415[NSSAMP] = {0.63231, 1.06171, 1.00779, 1.36423, 1.34133, |
| 33 |
|
|
1.27258, 1.26276, 1.26352, 1.22201, 1.13246, |
| 34 |
|
|
1.0434, 1.05547, 0.98212, 0.94445, 0.9722, |
| 35 |
|
|
0.82387, 0.87853, 0.82559, 0.75111, 0.78925}; |
| 36 |
|
|
|
| 37 |
greg |
2.2 |
/* European and North American zones */ |
| 38 |
|
|
struct { |
| 39 |
|
|
char zname[8]; /* time zone name (all caps) */ |
| 40 |
|
|
float zmer; /* standard meridian */ |
| 41 |
|
|
} tzone[] = {{"YST", 135}, {"YDT", 120}, {"PST", 120}, {"PDT", 105}, |
| 42 |
|
|
{"MST", 105}, {"MDT", 90}, {"CST", 90}, {"CDT", 75}, |
| 43 |
|
|
{"EST", 75}, {"EDT", 60}, {"AST", 60}, {"ADT", 45}, |
| 44 |
|
|
{"NST", 52.5}, {"NDT", 37.5}, {"GMT", 0}, {"BST", -15}, |
| 45 |
|
|
{"CET", -15}, {"CEST", -30}, {"EET", -30}, {"EEST", -45}, |
| 46 |
|
|
{"AST", -45}, {"ADT", -60}, {"GST", -60}, {"GDT", -75}, |
| 47 |
|
|
{"IST", -82.5}, {"IDT", -97.5}, {"JST", -135}, {"NDT", -150}, |
| 48 |
|
|
{"NZST", -180}, {"NZDT", -195}, {"", 0}}; |
| 49 |
|
|
|
| 50 |
|
|
static int make_directory(const char *path) { |
| 51 |
|
|
#ifdef _WIN32 |
| 52 |
|
|
if (CreateDirectory(path, NULL) || GetLastError() == ERROR_ALREADY_EXISTS) { |
| 53 |
|
|
return 1; |
| 54 |
|
|
} |
| 55 |
|
|
return 0; |
| 56 |
|
|
#else |
| 57 |
|
|
if (mkdir(path, 0777) == 0 || errno == EEXIST) { |
| 58 |
|
|
return 1; |
| 59 |
|
|
} |
| 60 |
|
|
return 0; |
| 61 |
|
|
#endif |
| 62 |
|
|
} |
| 63 |
|
|
|
| 64 |
|
|
static int cvthour(char *hs, int *tsolar, double *hour) { |
| 65 |
|
|
char *cp = hs; |
| 66 |
|
|
int i, j; |
| 67 |
|
|
|
| 68 |
|
|
if ((*tsolar = *cp == '+')) |
| 69 |
|
|
cp++; /* solar time? */ |
| 70 |
|
|
while (isdigit(*cp)) |
| 71 |
|
|
cp++; |
| 72 |
|
|
if (*cp == ':') |
| 73 |
|
|
*hour = atoi(hs) + atoi(++cp) / 60.0; |
| 74 |
|
|
else { |
| 75 |
|
|
*hour = atof(hs); |
| 76 |
|
|
if (*cp == '.') |
| 77 |
|
|
cp++; |
| 78 |
|
|
} |
| 79 |
|
|
while (isdigit(*cp)) |
| 80 |
|
|
cp++; |
| 81 |
|
|
if (!*cp) |
| 82 |
|
|
return (0); |
| 83 |
|
|
if (*tsolar || !isalpha(*cp)) { |
| 84 |
|
|
fprintf(stderr, "%s: bad time format: %s\n", progname, hs); |
| 85 |
|
|
exit(1); |
| 86 |
|
|
} |
| 87 |
|
|
i = 0; |
| 88 |
|
|
do { |
| 89 |
|
|
for (j = 0; cp[j]; j++) |
| 90 |
|
|
if (toupper(cp[j]) != tzone[i].zname[j]) |
| 91 |
|
|
break; |
| 92 |
|
|
if (!cp[j] && !tzone[i].zname[j]) { |
| 93 |
|
|
s_meridian = tzone[i].zmer * (PI / 180); |
| 94 |
|
|
return (1); |
| 95 |
|
|
} |
| 96 |
|
|
} while (tzone[i++].zname[0]); |
| 97 |
|
|
|
| 98 |
|
|
fprintf(stderr, "%s: unknown time zone: %s\n", progname, cp); |
| 99 |
|
|
fprintf(stderr, "Known time zones:\n\t%s", tzone[0].zname); |
| 100 |
|
|
for (i = 1; tzone[i].zname[0]; i++) |
| 101 |
|
|
fprintf(stderr, " %s", tzone[i].zname); |
| 102 |
|
|
putc('\n', stderr); |
| 103 |
|
|
exit(1); |
| 104 |
|
|
} |
| 105 |
|
|
|
| 106 |
|
|
static void basename(const char *path, char *output, size_t outsize) { |
| 107 |
|
|
const char *last_slash = strrchr(path, '/'); |
| 108 |
|
|
const char *last_backslash = strrchr(path, '\\'); |
| 109 |
|
|
const char *filename = path; |
| 110 |
|
|
const char *last_dot; |
| 111 |
|
|
|
| 112 |
|
|
if (last_slash && last_backslash) { |
| 113 |
|
|
filename = |
| 114 |
|
|
(last_slash > last_backslash) ? last_slash + 1 : last_backslash + 1; |
| 115 |
|
|
} else if (last_slash) { |
| 116 |
|
|
filename = last_slash + 1; |
| 117 |
|
|
} else if (last_backslash) { |
| 118 |
|
|
filename = last_backslash + 1; |
| 119 |
|
|
} |
| 120 |
|
|
|
| 121 |
|
|
last_dot = strrchr(filename, '.'); |
| 122 |
|
|
if (last_dot) { |
| 123 |
|
|
size_t length = last_dot - filename; |
| 124 |
|
|
if (length < outsize) { |
| 125 |
|
|
strncpy(output, filename, length); |
| 126 |
|
|
output[length] = '\0'; |
| 127 |
|
|
} else { |
| 128 |
|
|
strncpy(output, filename, outsize - 1); |
| 129 |
|
|
output[outsize - 1] = '\0'; |
| 130 |
|
|
} |
| 131 |
|
|
} |
| 132 |
|
|
} |
| 133 |
|
|
|
| 134 |
|
|
char *join_paths(const char *path1, const char *path2) { |
| 135 |
|
|
size_t len1 = strlen(path1); |
| 136 |
|
|
size_t len2 = strlen(path2); |
| 137 |
|
|
int need_separator = (path1[len1 - 1] != DIRSEP); |
| 138 |
|
|
|
| 139 |
|
|
char *result = malloc(len1 + len2 + (need_separator ? 2 : 1)); |
| 140 |
|
|
if (!result) |
| 141 |
|
|
return NULL; |
| 142 |
|
|
|
| 143 |
|
|
strcpy(result, path1); |
| 144 |
|
|
if (need_separator) { |
| 145 |
|
|
result[len1] = DIRSEP; |
| 146 |
|
|
len1++; |
| 147 |
|
|
} |
| 148 |
|
|
strcpy(result + len1, path2); |
| 149 |
|
|
|
| 150 |
|
|
return result; |
| 151 |
|
|
} |
| 152 |
|
|
|
| 153 |
greg |
2.1 |
static inline double wmean2(const double a, const double b, const double x) { |
| 154 |
|
|
return a * (1 - x) + b * x; |
| 155 |
|
|
} |
| 156 |
|
|
|
| 157 |
|
|
static inline double wmean(const double a, const double x, const double b, |
| 158 |
|
|
const double y) { |
| 159 |
|
|
return (a * x + b * y) / (a + b); |
| 160 |
|
|
} |
| 161 |
|
|
|
| 162 |
|
|
static double get_zenith_brightness(const double sundir[3]) { |
| 163 |
|
|
double zenithbr; |
| 164 |
|
|
if (sundir[2] < 0) { |
| 165 |
|
|
zenithbr = 0; |
| 166 |
|
|
} else { |
| 167 |
|
|
zenithbr = (8.6 * sundir[2] + .123) * 1000.0 / D65EFF; |
| 168 |
|
|
} |
| 169 |
|
|
return zenithbr; |
| 170 |
|
|
} |
| 171 |
|
|
|
| 172 |
greg |
2.2 |
/* from gensky.c */ |
| 173 |
greg |
2.1 |
static double get_overcast_brightness(const double dz, const double zenithbr) { |
| 174 |
|
|
double groundbr = zenithbr * GNORM; |
| 175 |
|
|
return wmean(pow(dz + 1.01, 10), zenithbr * (1 + 2 * dz) / 3, |
| 176 |
|
|
pow(dz + 1.01, -10), groundbr); |
| 177 |
|
|
} |
| 178 |
|
|
|
| 179 |
greg |
2.2 |
static void write_header(const int argc, char **argv, const double cloud_cover, |
| 180 |
|
|
const double grefl, const int res) { |
| 181 |
|
|
printf("# "); |
| 182 |
|
|
for (int i = 0; i < argc; i++) { |
| 183 |
|
|
printf("%s ", argv[i]); |
| 184 |
|
|
} |
| 185 |
|
|
printf("\n"); |
| 186 |
|
|
printf("#Cloud cover: %g\n#Ground reflectance: %g\n#Sky map resolution: %d\n\n", |
| 187 |
|
|
cloud_cover, grefl, res); |
| 188 |
|
|
} |
| 189 |
|
|
|
| 190 |
|
|
static void write_rad(const double *sun_radiance, const FVECT sundir, |
| 191 |
|
|
const char skyfile[PATH_MAX], |
| 192 |
|
|
const char grndfile[PATH_MAX]) { |
| 193 |
greg |
2.1 |
if (sundir[2] > 0) { |
| 194 |
greg |
2.2 |
printf("void spectrum sunrad\n0\n0\n22 380 780 "); |
| 195 |
|
|
/* Normalize to one */ |
| 196 |
|
|
double sum = 0.0; |
| 197 |
greg |
2.1 |
for (int i = 0; i < NSSAMP; ++i) { |
| 198 |
greg |
2.2 |
sum += sun_radiance[i]; |
| 199 |
greg |
2.1 |
} |
| 200 |
greg |
2.2 |
double mean = sum / NSSAMP; |
| 201 |
|
|
for (int i = 0; i < NSSAMP; ++i) { |
| 202 |
|
|
printf("%.3f ", sun_radiance[i] / mean); |
| 203 |
|
|
} |
| 204 |
|
|
double intensity = mean * WVLSPAN; |
| 205 |
|
|
printf("\n\nsunrad light solar\n0\n0\n3 %.1f %.1f %.1f\n\n", intensity, |
| 206 |
|
|
intensity, intensity); |
| 207 |
|
|
printf("solar source sun\n0\n0\n4 %f %f %f 0.533\n\n", sundir[0], sundir[1], |
| 208 |
|
|
sundir[2]); |
| 209 |
|
|
} |
| 210 |
|
|
printf("void specpict skymap\n8 noop %s fisheye.cal fish_u fish_v -rx 90 " |
| 211 |
|
|
"-mx\n0\n0\n\n", |
| 212 |
|
|
skyfile); |
| 213 |
|
|
|
| 214 |
|
|
printf("void specpict grndmap\n8 noop %s fisheye.cal fish_u fish_v -rx -90 " |
| 215 |
|
|
"-my\n0\n0\n\n", |
| 216 |
|
|
grndfile); |
| 217 |
|
|
printf("void mixfunc skyfunc\n4 skymap grndmap if(Dz,1,0) .\n0\n0\n"); |
| 218 |
greg |
2.1 |
} |
| 219 |
|
|
|
| 220 |
|
|
static void write_hsr_header(FILE *fp, RESOLU *res) { |
| 221 |
|
|
float wvsplit[4] = {380, 480, 588, |
| 222 |
greg |
2.2 |
780}; /* RGB wavelength limits+partitions (nm) */ |
| 223 |
greg |
2.1 |
newheader("RADIANCE", fp); |
| 224 |
|
|
fputncomp(NSSAMP, fp); |
| 225 |
|
|
fputwlsplit(wvsplit, fp); |
| 226 |
|
|
fputformat(SPECFMT, fp); |
| 227 |
|
|
fputc('\n', fp); |
| 228 |
|
|
fputsresolu(res, fp); |
| 229 |
|
|
} |
| 230 |
|
|
|
| 231 |
|
|
int gen_spect_sky(DATARRAY *tau_clear, DATARRAY *scat_clear, |
| 232 |
|
|
DATARRAY *scat1m_clear, DATARRAY *irrad_clear, |
| 233 |
|
|
const double cloud_cover, const FVECT sundir, |
| 234 |
|
|
const double grefl, const int res, const char *outname) { |
| 235 |
|
|
char skyfile[PATH_MAX]; |
| 236 |
|
|
char grndfile[PATH_MAX]; |
| 237 |
|
|
if (!snprintf(skyfile, sizeof(skyfile), "%s_sky.hsr", outname)) { |
| 238 |
|
|
fprintf(stderr, "Error setting sky file name\n"); |
| 239 |
|
|
return 0; |
| 240 |
|
|
}; |
| 241 |
|
|
if (!snprintf(grndfile, sizeof(grndfile), "%s_ground.hsr", outname)) { |
| 242 |
|
|
fprintf(stderr, "Error setting ground file name\n"); |
| 243 |
|
|
return 0; |
| 244 |
|
|
} |
| 245 |
|
|
RESOLU rs = {PIXSTANDARD, res, res}; |
| 246 |
|
|
FILE *skyfp = fopen(skyfile, "w"); |
| 247 |
|
|
FILE *grndfp = fopen(grndfile, "w"); |
| 248 |
|
|
write_hsr_header(grndfp, &rs); |
| 249 |
|
|
write_hsr_header(skyfp, &rs); |
| 250 |
|
|
VIEW skyview = {VT_ANG, {0., 0., 0.}, {0., 0., 1.}, {0., 1., 0.}, 1., |
| 251 |
|
|
180., 180., 0., 0., 0., |
| 252 |
|
|
0., {0., 0., 0.}, {0., 0., 0.}, 0., 0.}; |
| 253 |
|
|
VIEW grndview = { |
| 254 |
|
|
VT_ANG, {0., 0., 0.}, {0., 0., -1.}, {0., 1., 0.}, 1., 180., 180., 0., 0., |
| 255 |
|
|
0., 0., {0., 0., 0.}, {0., 0., 0.}, 0., 0.}; |
| 256 |
|
|
setview(&skyview); |
| 257 |
|
|
setview(&grndview); |
| 258 |
|
|
|
| 259 |
|
|
CNDX[3] = NSSAMP; |
| 260 |
|
|
|
| 261 |
|
|
FVECT view_point = {0, 0, ER}; |
| 262 |
|
|
const double radius = VLEN(view_point); |
| 263 |
|
|
const double sun_ct = fdot(view_point, sundir) / radius; |
| 264 |
|
|
for (unsigned int j = 0; j < res; ++j) { |
| 265 |
|
|
for (unsigned int i = 0; i < res; ++i) { |
| 266 |
|
|
RREAL loc[2]; |
| 267 |
|
|
FVECT rorg = {0}; |
| 268 |
|
|
FVECT rdir_sky = {0}; |
| 269 |
|
|
FVECT rdir_grnd = {0}; |
| 270 |
|
|
SCOLOR sky_radiance = {0}; |
| 271 |
|
|
SCOLOR ground_radiance = {0}; |
| 272 |
|
|
SCOLR sky_sclr = {0}; |
| 273 |
|
|
SCOLR ground_sclr = {0}; |
| 274 |
|
|
|
| 275 |
|
|
pix2loc(loc, &rs, i, j); |
| 276 |
|
|
viewray(rorg, rdir_sky, &skyview, loc[0], loc[1]); |
| 277 |
|
|
viewray(rorg, rdir_grnd, &grndview, loc[0], loc[1]); |
| 278 |
|
|
|
| 279 |
|
|
const double mu_sky = fdot(view_point, rdir_sky) / radius; |
| 280 |
|
|
const double nu_sky = fdot(rdir_sky, sundir); |
| 281 |
|
|
|
| 282 |
|
|
const double mu_grnd = fdot(view_point, rdir_grnd) / radius; |
| 283 |
|
|
const double nu_grnd = fdot(rdir_grnd, sundir); |
| 284 |
|
|
|
| 285 |
|
|
get_sky_radiance(scat_clear, scat1m_clear, radius, mu_sky, sun_ct, nu_sky, |
| 286 |
|
|
sky_radiance); |
| 287 |
|
|
get_ground_radiance(tau_clear, scat_clear, scat1m_clear, irrad_clear, |
| 288 |
|
|
view_point, rdir_grnd, radius, mu_grnd, sun_ct, |
| 289 |
|
|
nu_grnd, grefl, sundir, ground_radiance); |
| 290 |
|
|
|
| 291 |
|
|
for (int k = 0; k < NSSAMP; ++k) { |
| 292 |
|
|
sky_radiance[k] *= WVLSPAN; |
| 293 |
|
|
ground_radiance[k] *= WVLSPAN; |
| 294 |
|
|
} |
| 295 |
|
|
|
| 296 |
|
|
if (cloud_cover > 0) { |
| 297 |
|
|
double zenithbr = get_zenith_brightness(sundir); |
| 298 |
|
|
double grndbr = zenithbr * GNORM; |
| 299 |
|
|
double skybr = get_overcast_brightness(rdir_sky[2], zenithbr); |
| 300 |
|
|
for (int k = 0; k < NSSAMP; ++k) { |
| 301 |
|
|
sky_radiance[k] = |
| 302 |
|
|
wmean2(sky_radiance[k], skybr * D6415[k], cloud_cover); |
| 303 |
|
|
ground_radiance[k] = |
| 304 |
|
|
wmean2(ground_radiance[k], grndbr * D6415[k], cloud_cover); |
| 305 |
|
|
} |
| 306 |
|
|
} |
| 307 |
|
|
|
| 308 |
|
|
scolor2scolr(sky_sclr, sky_radiance, 20); |
| 309 |
|
|
putbinary(sky_sclr, LSCOLR, 1, skyfp); |
| 310 |
|
|
|
| 311 |
|
|
scolor2scolr(ground_sclr, ground_radiance, 20); |
| 312 |
|
|
putbinary(ground_sclr, LSCOLR, 1, grndfp); |
| 313 |
|
|
} |
| 314 |
|
|
} |
| 315 |
|
|
fclose(skyfp); |
| 316 |
|
|
fclose(grndfp); |
| 317 |
|
|
|
| 318 |
greg |
2.2 |
/* Get solar radiance */ |
| 319 |
greg |
2.1 |
double sun_radiance[NSSAMP] = {0}; |
| 320 |
|
|
get_solar_radiance(tau_clear, scat_clear, scat1m_clear, sundir, radius, |
| 321 |
|
|
sun_ct, sun_radiance); |
| 322 |
|
|
if (cloud_cover > 0) { |
| 323 |
|
|
double zenithbr = get_zenith_brightness(sundir); |
| 324 |
|
|
double skybr = get_overcast_brightness(sundir[2], zenithbr); |
| 325 |
|
|
for (int i = 0; i < NSSAMP; ++i) { |
| 326 |
|
|
sun_radiance[i] = |
| 327 |
|
|
wmean2(sun_radiance[i], D6415[i] * skybr / WVLSPAN, cloud_cover); |
| 328 |
|
|
} |
| 329 |
|
|
} |
| 330 |
|
|
|
| 331 |
greg |
2.2 |
write_rad(sun_radiance, sundir, skyfile, grndfile); |
| 332 |
greg |
2.1 |
return 1; |
| 333 |
|
|
} |
| 334 |
|
|
|
| 335 |
greg |
2.2 |
static DpPaths get_dppaths(const char *dir, const double aod, const char *mname, |
| 336 |
|
|
const char *tag) { |
| 337 |
greg |
2.1 |
DpPaths paths; |
| 338 |
|
|
|
| 339 |
greg |
2.2 |
snprintf(paths.tau, PATH_MAX, "%s%ctau_%s_%s_%.2f.dat", dir, DIRSEP, tag, |
| 340 |
|
|
mname, aod); |
| 341 |
|
|
snprintf(paths.scat, PATH_MAX, "%s%cscat_%s_%s_%.2f.dat", dir, DIRSEP, tag, |
| 342 |
|
|
mname, aod); |
| 343 |
|
|
snprintf(paths.scat1m, PATH_MAX, "%s%cscat1m_%s_%s_%.2f.dat", dir, DIRSEP, |
| 344 |
|
|
tag, mname, aod); |
| 345 |
|
|
snprintf(paths.irrad, PATH_MAX, "%s%cirrad_%s_%s_%.2f.dat", dir, DIRSEP, tag, |
| 346 |
|
|
mname, aod); |
| 347 |
greg |
2.1 |
|
| 348 |
|
|
return paths; |
| 349 |
|
|
} |
| 350 |
|
|
|
| 351 |
greg |
2.2 |
static void set_rayleigh_density_profile(Atmosphere *atmos, char *tag, |
| 352 |
|
|
const int is_summer, |
| 353 |
greg |
2.1 |
const double s_latitude) { |
| 354 |
greg |
2.2 |
/* Set rayleigh density profile */ |
| 355 |
|
|
if (fabs(s_latitude * 180.0 / PI) > ARCTIC_LAT) { |
| 356 |
greg |
2.1 |
tag[0] = 's'; |
| 357 |
|
|
if (is_summer) { |
| 358 |
|
|
tag[1] = 's'; |
| 359 |
|
|
atmos->rayleigh_density.layers[0].exp_scale = -1.0 / HR_SS; |
| 360 |
|
|
atmos->beta_r0 = BR0_SS; |
| 361 |
|
|
} else { |
| 362 |
|
|
tag[1] = 'w'; |
| 363 |
|
|
atmos->rayleigh_density.layers[0].exp_scale = -1.0 / HR_SW; |
| 364 |
|
|
atmos->beta_r0 = BR0_SW; |
| 365 |
|
|
} |
| 366 |
greg |
2.2 |
} else if (fabs(s_latitude * 180.0 / PI) > TROPIC_LAT) { |
| 367 |
greg |
2.1 |
tag[0] = 'm'; |
| 368 |
|
|
if (is_summer) { |
| 369 |
|
|
tag[1] = 's'; |
| 370 |
|
|
atmos->rayleigh_density.layers[0].exp_scale = -1.0 / HR_MS; |
| 371 |
|
|
atmos->beta_r0 = BR0_MS; |
| 372 |
|
|
} else { |
| 373 |
|
|
tag[1] = 'w'; |
| 374 |
|
|
atmos->rayleigh_density.layers[0].exp_scale = -1.0 / HR_MW; |
| 375 |
|
|
atmos->beta_r0 = BR0_MW; |
| 376 |
|
|
} |
| 377 |
|
|
} else { |
| 378 |
|
|
tag[0] = 't'; |
| 379 |
|
|
tag[1] = 'r'; |
| 380 |
|
|
atmos->rayleigh_density.layers[0].exp_scale = -1.0 / HR_T; |
| 381 |
|
|
atmos->beta_r0 = BR0_T; |
| 382 |
|
|
} |
| 383 |
|
|
tag[2] = '\0'; |
| 384 |
|
|
} |
| 385 |
|
|
|
| 386 |
|
|
static Atmosphere init_atmos(const double aod, const double grefl) { |
| 387 |
greg |
2.2 |
Atmosphere atmos = {.ozone_density = {.layers = |
| 388 |
|
|
{ |
| 389 |
|
|
{.width = 25000.0, |
| 390 |
|
|
.exp_term = 0.0, |
| 391 |
|
|
.exp_scale = 0.0, |
| 392 |
|
|
.linear_term = 1.0 / 15000.0, |
| 393 |
|
|
.constant_term = -2.0 / 3.0}, |
| 394 |
|
|
{.width = AH, |
| 395 |
|
|
.exp_term = 0.0, |
| 396 |
|
|
.exp_scale = 0.0, |
| 397 |
|
|
.linear_term = -1.0 / 15000.0, |
| 398 |
|
|
.constant_term = 8.0 / 3.0}, |
| 399 |
|
|
}}, |
| 400 |
|
|
.rayleigh_density = {.layers = |
| 401 |
|
|
{ |
| 402 |
|
|
{.width = AH, |
| 403 |
|
|
.exp_term = 1.0, |
| 404 |
|
|
.exp_scale = -1.0 / HR_MS, |
| 405 |
|
|
.linear_term = 0.0, |
| 406 |
|
|
.constant_term = 0.0}, |
| 407 |
|
|
}}, |
| 408 |
|
|
.beta_r0 = BR0_MS, |
| 409 |
|
|
.beta_scale = aod / AOD0_CA, |
| 410 |
|
|
.beta_m = NULL, |
| 411 |
|
|
.grefl = grefl}; |
| 412 |
greg |
2.1 |
return atmos; |
| 413 |
|
|
} |
| 414 |
|
|
|
| 415 |
|
|
int main(int argc, char *argv[]) { |
| 416 |
|
|
progname = argv[0]; |
| 417 |
|
|
int month, day; |
| 418 |
|
|
double hour; |
| 419 |
|
|
FVECT sundir; |
| 420 |
|
|
int num_threads = 1; |
| 421 |
|
|
int sorder = 4; |
| 422 |
|
|
int year = 0; |
| 423 |
|
|
int tsolar = 0; |
| 424 |
greg |
2.2 |
int got_meridian = 0; |
| 425 |
greg |
2.1 |
double grefl = 0.2; |
| 426 |
|
|
double ccover = 0.0; |
| 427 |
|
|
int res = 128; |
| 428 |
|
|
double aod = AOD0_CA; |
| 429 |
|
|
char *outname = "out"; |
| 430 |
|
|
char *mie_path = getpath("mie_ca.dat", getrlibpath(), R_OK); |
| 431 |
greg |
2.2 |
char mie_name[20] = "mie_ca"; |
| 432 |
greg |
2.1 |
char lstag[3]; |
| 433 |
greg |
2.2 |
char *ddir = "."; |
| 434 |
|
|
|
| 435 |
|
|
if (!strcmp(argv[1], "-defaults")) { |
| 436 |
|
|
printf("-i %d\t\t\t\t#scattering order\n", sorder); |
| 437 |
|
|
printf("-g %f\t\t\t#ground reflectance\n", grefl); |
| 438 |
|
|
printf("-c %f\t\t\t#cloud cover\n", ccover); |
| 439 |
|
|
printf("-r %d\t\t\t\t#image resolution\n", res); |
| 440 |
|
|
printf("-d %f\t\t\t#broadband aerosol optical depth\n", AOD0_CA); |
| 441 |
|
|
printf("-f %s\t\t\t\t#output name (-f)\n", outname); |
| 442 |
|
|
printf("-p %s\t\t\t\t#atmos data directory\n", ddir); |
| 443 |
|
|
exit(1); |
| 444 |
|
|
} |
| 445 |
greg |
2.1 |
|
| 446 |
|
|
if (argc < 4) { |
| 447 |
greg |
2.2 |
fprintf(stderr, |
| 448 |
|
|
"Usage: %s month day hour -y year -a lat -o lon -m tz -d aod -r " |
| 449 |
|
|
"res -n nproc -c ccover -l mie -g grefl -f outpath\n", |
| 450 |
greg |
2.1 |
argv[0]); |
| 451 |
|
|
return 0; |
| 452 |
|
|
} |
| 453 |
|
|
|
| 454 |
|
|
month = atoi(argv[1]); |
| 455 |
greg |
2.2 |
if (month < 1 || month > 12) { |
| 456 |
|
|
fprintf(stderr, "bad month"); |
| 457 |
|
|
exit(1); |
| 458 |
|
|
} |
| 459 |
greg |
2.1 |
day = atoi(argv[2]); |
| 460 |
greg |
2.2 |
if (day < 1 || day > 31) { |
| 461 |
|
|
fprintf(stderr, "bad month"); |
| 462 |
|
|
exit(1); |
| 463 |
|
|
} |
| 464 |
|
|
got_meridian = cvthour(argv[3], &tsolar, &hour); |
| 465 |
greg |
2.1 |
|
| 466 |
|
|
if (!compute_sundir(year, month, day, hour, tsolar, sundir)) { |
| 467 |
|
|
fprintf(stderr, "Cannot compute solar angle\n"); |
| 468 |
|
|
exit(1); |
| 469 |
|
|
} |
| 470 |
|
|
|
| 471 |
|
|
for (int i = 4; i < argc; i++) { |
| 472 |
|
|
if (argv[i][0] == '-') { |
| 473 |
|
|
switch (argv[i][1]) { |
| 474 |
|
|
case 'a': |
| 475 |
|
|
s_latitude = atof(argv[++i]) * (PI / 180.0); |
| 476 |
|
|
break; |
| 477 |
|
|
case 'c': |
| 478 |
|
|
ccover = atof(argv[++i]); |
| 479 |
|
|
break; |
| 480 |
|
|
case 'd': |
| 481 |
|
|
aod = atof(argv[++i]); |
| 482 |
|
|
break; |
| 483 |
greg |
2.2 |
case 'f': |
| 484 |
|
|
outname = argv[++i]; |
| 485 |
|
|
break; |
| 486 |
|
|
case 'g': |
| 487 |
|
|
grefl = atof(argv[++i]); |
| 488 |
|
|
break; |
| 489 |
greg |
2.1 |
case 'i': |
| 490 |
|
|
sorder = atoi(argv[++i]); |
| 491 |
|
|
break; |
| 492 |
|
|
case 'l': |
| 493 |
|
|
mie_path = argv[++i]; |
| 494 |
greg |
2.2 |
basename(mie_path, mie_name, sizeof(mie_name)); |
| 495 |
greg |
2.1 |
break; |
| 496 |
|
|
case 'm': |
| 497 |
greg |
2.2 |
if (got_meridian) { |
| 498 |
|
|
++i; |
| 499 |
|
|
break; |
| 500 |
|
|
} |
| 501 |
greg |
2.1 |
s_meridian = atof(argv[++i]) * (PI / 180.0); |
| 502 |
|
|
break; |
| 503 |
|
|
case 'n': |
| 504 |
|
|
num_threads = atoi(argv[++i]); |
| 505 |
|
|
break; |
| 506 |
greg |
2.2 |
case 'o': |
| 507 |
|
|
s_longitude = atof(argv[++i]) * (PI / 180.0); |
| 508 |
greg |
2.1 |
break; |
| 509 |
greg |
2.2 |
case 'p': |
| 510 |
|
|
ddir = argv[++i]; |
| 511 |
greg |
2.1 |
break; |
| 512 |
|
|
case 'r': |
| 513 |
|
|
res = atoi(argv[++i]); |
| 514 |
|
|
break; |
| 515 |
greg |
2.2 |
case 'y': |
| 516 |
|
|
year = atoi(argv[++i]); |
| 517 |
|
|
break; |
| 518 |
greg |
2.1 |
default: |
| 519 |
|
|
fprintf(stderr, "Unknown option %s\n", argv[i]); |
| 520 |
|
|
exit(1); |
| 521 |
|
|
} |
| 522 |
|
|
} |
| 523 |
|
|
} |
| 524 |
greg |
2.2 |
if (year && (year < 1950) | (year > 2050)) |
| 525 |
|
|
fprintf(stderr, "%s: warning - year should be in range 1950-2050\n", |
| 526 |
|
|
progname); |
| 527 |
|
|
if (month && !tsolar && fabs(s_meridian - s_longitude) > 45 * PI / 180) |
| 528 |
|
|
fprintf(stderr, |
| 529 |
|
|
"%s: warning - %.1f hours btwn. standard meridian and longitude\n", |
| 530 |
|
|
progname, (s_longitude - s_meridian) * 12 / PI); |
| 531 |
greg |
2.1 |
|
| 532 |
|
|
Atmosphere clear_atmos = init_atmos(aod, grefl); |
| 533 |
|
|
|
| 534 |
|
|
int is_summer = (month >= SUMMER_START && month <= SUMMER_END); |
| 535 |
|
|
if (s_latitude < 0) { |
| 536 |
|
|
is_summer = !is_summer; |
| 537 |
|
|
} |
| 538 |
|
|
set_rayleigh_density_profile(&clear_atmos, lstag, is_summer, s_latitude); |
| 539 |
|
|
|
| 540 |
greg |
2.2 |
/* Load mie density data */ |
| 541 |
greg |
2.1 |
DATARRAY *mie_dp = getdata(mie_path); |
| 542 |
|
|
if (mie_dp == NULL) { |
| 543 |
|
|
fprintf(stderr, "Error reading mie data\n"); |
| 544 |
|
|
return 0; |
| 545 |
|
|
} |
| 546 |
|
|
clear_atmos.beta_m = mie_dp; |
| 547 |
|
|
|
| 548 |
greg |
2.2 |
char gsdir[PATH_MAX]; |
| 549 |
|
|
size_t siz = strlen(ddir); |
| 550 |
|
|
if (ISDIRSEP(ddir[siz-1])) |
| 551 |
|
|
ddir[siz-1] = '\0'; |
| 552 |
|
|
snprintf(gsdir, PATH_MAX, "%s%catmos_data", ddir, DIRSEP); |
| 553 |
|
|
printf("gsdir: %s\n", gsdir); |
| 554 |
|
|
if (!make_directory(gsdir)) { |
| 555 |
|
|
fprintf(stderr, "Failed creating atmos_data directory"); |
| 556 |
|
|
exit(1); |
| 557 |
|
|
} |
| 558 |
|
|
DpPaths clear_paths = get_dppaths(gsdir, aod, mie_name, lstag); |
| 559 |
greg |
2.1 |
|
| 560 |
|
|
if (getpath(clear_paths.tau, ".", R_OK) == NULL || |
| 561 |
|
|
getpath(clear_paths.scat, ".", R_OK) == NULL || |
| 562 |
|
|
getpath(clear_paths.scat1m, ".", R_OK) == NULL || |
| 563 |
|
|
getpath(clear_paths.irrad, ".", R_OK) == NULL) { |
| 564 |
greg |
2.2 |
printf("# Pre-computing...\n"); |
| 565 |
greg |
2.1 |
if (!precompute(sorder, clear_paths, &clear_atmos, num_threads)) { |
| 566 |
greg |
2.2 |
fprintf(stderr, "Pre-compute failed\n"); |
| 567 |
greg |
2.1 |
return 0; |
| 568 |
|
|
} |
| 569 |
|
|
} |
| 570 |
|
|
|
| 571 |
|
|
DATARRAY *tau_clear_dp = getdata(clear_paths.tau); |
| 572 |
|
|
DATARRAY *irrad_clear_dp = getdata(clear_paths.irrad); |
| 573 |
|
|
DATARRAY *scat_clear_dp = getdata(clear_paths.scat); |
| 574 |
|
|
DATARRAY *scat1m_clear_dp = getdata(clear_paths.scat1m); |
| 575 |
|
|
|
| 576 |
greg |
2.2 |
write_header(argc, argv, ccover, grefl, res); |
| 577 |
|
|
|
| 578 |
greg |
2.1 |
if (!gen_spect_sky(tau_clear_dp, scat_clear_dp, scat1m_clear_dp, |
| 579 |
|
|
irrad_clear_dp, ccover, sundir, grefl, res, outname)) { |
| 580 |
|
|
fprintf(stderr, "gen_spect_sky failed\n"); |
| 581 |
|
|
exit(1); |
| 582 |
|
|
} |
| 583 |
|
|
|
| 584 |
|
|
freedata(mie_dp); |
| 585 |
|
|
freedata(tau_clear_dp); |
| 586 |
|
|
freedata(scat_clear_dp); |
| 587 |
|
|
freedata(irrad_clear_dp); |
| 588 |
|
|
freedata(scat1m_clear_dp); |
| 589 |
|
|
|
| 590 |
|
|
return 1; |
| 591 |
|
|
} |
