36 |
|
extern double s_meridian; |
37 |
|
/* required values */ |
38 |
|
int month, day; /* date */ |
39 |
< |
double hour; /* standard time */ |
39 |
> |
double hour; /* time */ |
40 |
> |
int tsolar; /* 0=standard, 1=solar */ |
41 |
|
double altitude, azimuth; /* or solar angles */ |
42 |
|
/* default values */ |
43 |
|
int cloudy = 0; /* 1=standard, 2=uniform */ |
59 |
|
int argc; |
60 |
|
char *argv[]; |
61 |
|
{ |
61 |
– |
extern double fabs(); |
62 |
|
int i; |
63 |
|
|
64 |
|
progname = argv[0]; |
74 |
|
month = 0; |
75 |
|
} else { |
76 |
|
month = atoi(argv[1]); |
77 |
+ |
if (month < 1 || month > 12) |
78 |
+ |
userror("bad month"); |
79 |
|
day = atoi(argv[2]); |
80 |
+ |
if (day < 1 || day > 31) |
81 |
+ |
userror("bad day"); |
82 |
|
hour = atof(argv[3]); |
83 |
+ |
if (hour < 0 || hour >= 24) |
84 |
+ |
userror("bad hour"); |
85 |
+ |
tsolar = argv[3][0] == '+'; |
86 |
|
} |
87 |
|
for (i = 4; i < argc; i++) |
88 |
|
if (argv[i][0] == '-' || argv[i][0] == '+') |
141 |
|
|
142 |
|
jd = jdate(month, day); /* Julian date */ |
143 |
|
sd = sdec(jd); /* solar declination */ |
144 |
< |
st = hour + stadj(jd); /* solar time */ |
144 |
> |
if (tsolar) /* solar time */ |
145 |
> |
st = hour; |
146 |
> |
else |
147 |
> |
st = hour + stadj(jd); |
148 |
|
altitude = salt(sd, st); |
149 |
|
azimuth = sazi(sd, st); |
150 |
|
} |
156 |
|
if (zenithbr <= 0.0) |
157 |
|
if (cloudy) { |
158 |
|
zenithbr = 8.6*sundir[2] + .123; |
159 |
< |
zenithbr *= 1000.0/SKYEFFICACY; |
159 |
> |
zenithbr *= 1000.0/WHTEFFICACY; |
160 |
|
} else { |
161 |
|
zenithbr = (1.376*turbidity-1.81)*tan(altitude)+0.38; |
162 |
|
zenithbr *= 1000.0/SKYEFFICACY; |
173 |
|
} else { |
174 |
|
F2 = 0.274*(0.91 + 10.0*exp(-3.0*(PI/2.0-altitude)) + |
175 |
|
0.45*sundir[2]*sundir[2]); |
176 |
< |
groundbr = zenithbr*normsc(PI/2.0-altitude)/F2/PI; |
176 |
> |
groundbr = zenithbr*normsc(altitude)/F2/PI; |
177 |
|
printf("# Ground ambient level: %f\n", groundbr); |
178 |
|
if (sundir[2] > 0.0) { |
179 |
|
if (sundir[2] > .16) |