void sidereal_time_to_gmt_hrs( DATES *dp, HRS *hours, MINU *min, DEG_MIN *longitude,
TIM *sidereal, char hem )
{
double side;
TIM local;
proc_longitude( longitude, &local );
if ( longitude->dir == 'e' || longitude->dir == 'E' ) {
sidereal->hours -= local.hours; /* make sidereal at gmt */
sidereal->minutes -= local.minutes;
sidereal->seconds -= local.seconds;
}
else {
sidereal->hours += local.hours;
sidereal->minutes += local.minutes;
sidereal->seconds += local.seconds;
}
if ( hem == 's' || hem == 'S' ) {
sidereal->hours -= 12;
}
adj_time( sidereal );
side = (double)sidereal->seconds;
side /= 60.0;
side += (double)sidereal->minutes;
side /= 60.0;
side += (double) sidereal->hours;
side = fmodulus( side, 24.0 );
calc_side_to_hm( dp, side, (short *)hours, (short *)min );
}
void hs_min_to_TIM( DATES *dp, TIM *time, DEG_MIN *lng, DEG_MIN *lat,
int hs_min, int hs_sys, int hs, int loc_hours, int loc_minutes )
{
double ramc;
MINU h, m;
TIM st;
ramc = house_to_ramc( hs+1, hs_min, lat, hs_sys );
right_asc_rads_to_sid_time( ramc, &st );
sidereal_time_to_gmt_hrs( dp, &h, &m, lng, &st, lat->dir );
time->hours = h;
time->hours -= loc_hours;
time->minutes = m;
time->minutes -= loc_minutes;
time->seconds = 0;
adj_time( time );
}
void oppositionPlot(void) {
int i;
double rasun, decsun, distsun, toporasun, topodecsun, x, y, z;
double jd, lstm, trueam, alt, ha, phi, longEcliptic, latEcliptic;
double objra, objdec;
openPlot("opposition");
cpgpap(PLOTSIZE/0.5,0.5);
cpgbbuf();
cpgsubp(2,2);
cpgpanl(1,1);
cpgswin(PHIMIN, PHIMAX, AMMIN, AMMAX);
cpgbox("BCNTS",0.0,0,"BVCNTS",0.0,0);
cpgmtxt("L",2.0,0.5,0.5,"airmass");
cpgmtxt("B",2.0,0.5,0.5,"angle from Sun");
cpgsci(2);
for(i=0; i<numobs; i++) {
jd = obs[i].date + 2400000.5;
lstm = lst(jd,longitude_hrs);
// get ecliptic coordinates
slaEqecl(obs[i].ra, obs[i].dec, obs[i].date, &longEcliptic, &latEcliptic);
if(fabs(latEcliptic) < 10.0/DEG_IN_RADIAN && obs[i].twilight==0) {
// get position of Sun
accusun(jd, lstm, latitude_deg, &rasun, &decsun, &distsun,
&toporasun, &topodecsun, &x, &y, &z);
// sun-object angle in degrees
// takes ra in hours, dec in degrees
objra = adj_time(obs[i].ra*HRS_IN_RADIAN);
objdec = obs[i].dec*DEG_IN_RADIAN;
phi = mysubtend(rasun, decsun, objra, objdec)*DEG_IN_RADIAN;
// angle from opposition is 180-phi
// FIXRANGE(phi,-180.0,180.0);
//airmass takes ra, dec, in radians, returns true airmass
airmass(obs[i].date, obs[i].ra, obs[i].dec, &trueam, &alt, &ha);
cpgpt1(phi, trueam, -1);
}
}
cpgsci(1);
cpgptxt(0.0,3.0,0.0,0.5,"|ecliptic latitude|<10");
cpgptxt(0.0,2.5,0.0,0.5,"night");
cpgsci(3);
cpgmove(-90.0,0.0);
cpgdraw(-90.0,4.0);
cpgmove( 90.0,0.0);
cpgdraw( 90.0,4.0);
cpgsci(1);
cpgpanl(1,2);
cpgswin(PHIMIN, PHIMAX, AMMIN, AMMAX);
cpgbox("BCNTS",0.0,0,"BVCNTS",0.0,0);
cpgmtxt("L",2.0,0.5,0.5,"airmass");
cpgmtxt("B",2.0,0.5,0.5,"angle from Sun");
cpgsci(2);
for(i=0; i<numobs; i++) {
jd = obs[i].date + 2400000.5;
lstm = lst(jd,longitude_hrs);
// get ecliptic coordinates
slaEqecl(obs[i].ra, obs[i].dec, obs[i].date, &longEcliptic, &latEcliptic);
if(fabs(latEcliptic) >= 10.0/DEG_IN_RADIAN && obs[i].twilight==0 ) {
// get position of Sun
accusun(jd, lstm, latitude_deg, &rasun, &decsun, &distsun,
&toporasun, &topodecsun, &x, &y, &z);
// sun-object angle in degrees
phi = mysubtend(rasun, decsun, obs[i].ra*HRS_IN_RADIAN, obs[i].dec*DEG_IN_RADIAN)*DEG_IN_RADIAN;
// angle from opposition is 180-phi
FIXRANGE(phi,-180.0,180.0);
airmass(obs[i].date, obs[i].ra, obs[i].dec, &trueam, &alt, &ha);
cpgpt1(phi, trueam, -1);
}
}
cpgsci(1);
cpgptxt(0.0,3.0,0.0,0.5,"|ecliptic latitude|>10");
cpgptxt(0.0,2.5,0.0,0.5,"night");
cpgsci(3);
cpgmove(-90.0,0.0);
cpgdraw(-90.0,4.0);
cpgmove( 90.0,0.0);
cpgdraw( 90.0,4.0);
cpgsci(1);
cpgpanl(2,1);
cpgswin(PHIMIN, PHIMAX, AMMIN, AMMAX);
cpgbox("BCNTS",0.0,0,"BVCNTS",0.0,0);
cpgmtxt("L",2.0,0.5,0.5,"airmass");
cpgmtxt("B",2.0,0.5,0.5,"angle from Sun");
cpgsci(2);
for(i=0; i<numobs; i++) {
jd = obs[i].date + 2400000.5;
lstm = lst(jd,longitude_hrs);
// get ecliptic coordinates
slaEqecl(obs[i].ra, obs[i].dec, obs[i].date, &longEcliptic, &latEcliptic);
if(fabs(latEcliptic) < 10.0/DEG_IN_RADIAN && obs[i].twilight==1) {
// get position of Sun
accusun(jd, lstm, latitude_deg, &rasun, &decsun, &distsun,
&toporasun, &topodecsun, &x, &y, &z);
// sun-object angle in degrees
// takes ra in hours, dec in degrees
objra = adj_time(obs[i].ra*HRS_IN_RADIAN);
objdec = obs[i].dec*DEG_IN_RADIAN;
phi = mysubtend(rasun, decsun, objra, objdec)*DEG_IN_RADIAN;
// angle from opposition is 180-phi
// FIXRANGE(phi,-180.0,180.0);
//airmass takes ra, dec, in radians, returns true airmass
airmass(obs[i].date, obs[i].ra, obs[i].dec, &trueam, &alt, &ha);
cpgpt1(phi, trueam, -1);
}
}
cpgsci(1);
cpgptxt(0.0,3.0,0.0,0.5,"|ecliptic latitude|<10");
cpgptxt(0.0,2.5,0.0,0.5,"twilight");
cpgsci(3);
cpgmove(-90.0,0.0);
cpgdraw(-90.0,4.0);
cpgmove( 90.0,0.0);
cpgdraw( 90.0,4.0);
cpgsci(1);
cpgpanl(2,2);
cpgswin(PHIMIN, PHIMAX, AMMIN, AMMAX);
cpgbox("BCNTS",0.0,0,"BVCNTS",0.0,0);
cpgmtxt("L",2.0,0.5,0.5,"airmass");
cpgmtxt("B",2.0,0.5,0.5,"angle from Sun");
cpgsci(2);
for(i=0; i<numobs; i++) {
jd = obs[i].date + 2400000.5;
lstm = lst(jd,longitude_hrs);
// get ecliptic coordinates
slaEqecl(obs[i].ra, obs[i].dec, obs[i].date, &longEcliptic, &latEcliptic);
if(fabs(latEcliptic) >= 10.0/DEG_IN_RADIAN && obs[i].twilight==1) {
// get position of Sun
accusun(jd, lstm, latitude_deg, &rasun, &decsun, &distsun,
&toporasun, &topodecsun, &x, &y, &z);
// sun-object angle in degrees
phi = mysubtend(rasun, decsun, obs[i].ra*HRS_IN_RADIAN, obs[i].dec*DEG_IN_RADIAN)*DEG_IN_RADIAN;
// angle from opposition is 180-phi
FIXRANGE(phi,-180.0,180.0);
airmass(obs[i].date, obs[i].ra, obs[i].dec, &trueam, &alt, &ha);
cpgpt1(phi, trueam, -1);
}
}
cpgsci(1);
cpgptxt(0.0,3.0,0.0,0.5,"|ecliptic latitude|>10");
cpgptxt(0.0,2.5,0.0,0.5,"twilight");
cpgsci(3);
cpgmove(-90.0,0.0);
cpgdraw(-90.0,4.0);
cpgmove( 90.0,0.0);
cpgdraw( 90.0,4.0);
cpgsci(1);
cpgebuf();
closePlot();
}
