865 lines
17 KiB
C
865 lines
17 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include "qfits.h"
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#include "cpgplot.h"
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#include "cel.h"
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#include <gsl/gsl_multifit.h>
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#define LIM 256
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#define NMAX 8192
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#define D2R M_PI/180.0
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#define R2D 180.0/M_PI
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struct star {
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double ra,de;
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float pmra,pmde;
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float mag;
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};
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struct image {
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int naxis1,naxis2,naxis3;
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float *z;
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float zmin,zmax;
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double ra0,de0;
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float avg,std;
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float x0,y0;
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float a[3],b[3],xrms,yrms;
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float exptime;
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double mjd;
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char nfd[32],filename[32];
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int cospar;
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} ;
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struct catalog {
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int n;
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float x[NMAX],y[NMAX],mag[NMAX];
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double ra[NMAX],de[NMAX],rx[NMAX],ry[NMAX];
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int select[NMAX];
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};
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struct observation {
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int satno,cospar;
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char desig[16],conditions,behavior;
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double mjd,ra,de;
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float terr,perr,tmid;
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char nfd[32],pos[32];
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int epoch,type;
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char iod_line[80];
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float x[3],y[3];
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int state;
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};
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struct image read_fits(char *filename,int pnum);
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int fgetline(FILE *file,char *s,int lim);
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int select_nearest(struct catalog c,float x,float y);
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// Return x modulo y [0,y)
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double modulo(double x,double y)
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{
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x=fmod(x,y);
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if (x<0.0) x+=y;
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return x;
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}
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// Greenwich Mean Sidereal Time
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double gmst(double mjd)
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{
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double t,gmst;
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t=(mjd-51544.5)/36525.0;
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gmst=modulo(280.46061837+360.98564736629*(mjd-51544.5)+t*t*(0.000387933-t/38710000),360.0);
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return gmst;
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}
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void plot_objects(char *filename)
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{
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int i;
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FILE *file;
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float x0,y0,x1,y1,texp;
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int id;
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char line[LIM],catalog[128],dummy[128],text[8];
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file=fopen(filename,"r");
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if (file==NULL)
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return;
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while (fgetline(file,line,LIM)>0) {
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sscanf(line,"%s %f %f %f %f %f %d %s",dummy,&x0,&y0,&x1,&y1,&texp,&id,catalog);
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cpgsci(0);
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if (strstr(catalog,"classfd")!=NULL)
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cpgsci(4);
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if (strstr(catalog,"inttles")!=NULL)
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cpgsci(3);
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cpgmove(x0,y0);
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cpgdraw(x1,y1);
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cpgpt1(x0,y0,4);
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sprintf(text," %05d",id);
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cpgtext(x0,y0,text);
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}
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fclose(file);
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cpgsci(1);
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return;
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}
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// Get a RA and Decl from x and y
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void reverse(double ra0,double de0,double x,double y,double *ra,double *de)
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{
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int i;
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char pcode[4]="TAN";
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double phi,theta;
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struct celprm cel;
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struct prjprm prj;
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x/=3600.;
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y/=3600.;
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// Initialize Projection Parameters
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prj.flag=0;
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prj.r0=0.;
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for (i=0;i<10;prj.p[i++]=0.);
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// Initialize Reference Angles
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cel.ref[0]=ra0;
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cel.ref[1]=de0;
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cel.ref[2]=999.;
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cel.ref[3]=999.;
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cel.flag=0.;
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if (celset(pcode,&cel,&prj)) {
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printf("Error in Projection (celset)\n");
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return;
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} else {
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if (celrev(pcode,x,y,&prj,&phi,&theta,&cel,ra,de)) {
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printf("Error in Projection (celrev)\n");
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return;
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}
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}
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return;
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}
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// Compute Date from Julian Day
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void mjd2date(double mjd,char *date)
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{
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double f,jd,dday;
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int z,alpha,a,b,c,d,e;
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double year,month,day,hour,min;
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double sec,x,fsec;
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jd=mjd+2400000.5;
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jd+=0.5;
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z=floor(jd);
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f=fmod(jd,1.);
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if (z<2299161)
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a=z;
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else {
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alpha=floor((z-1867216.25)/36524.25);
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a=z+1+alpha-floor(alpha/4.);
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}
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b=a+1524;
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c=floor((b-122.1)/365.25);
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d=floor(365.25*c);
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e=floor((b-d)/30.6001);
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dday=b-d-floor(30.6001*e)+f;
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if (e<14)
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month=e-1;
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else
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month=e-13;
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if (month>2)
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year=c-4716;
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else
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year=c-4715;
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day=(int) floor(dday);
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x=24.0*(dday-day);
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x=3600.*fabs(x);
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sec=fmod(x,60.);
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x=(x-sec)/60.;
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min=fmod(x,60.);
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x=(x-min)/60.;
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hour=x;
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fsec=1000.0*(sec-floor(sec));
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sprintf(date,"%04d%02d%02d%02d%02d%02.0f%03.0f",(int) year,(int) month,(int) day,(int) hour,(int) min,floor(sec),fsec);
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return;
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}
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// Convert Decimal into Sexagesimal
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void dec2sex(double x,char *s,int type)
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{
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int i;
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double sec,deg,min,fmin;
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char sign;
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sign=(x<0 ? '-' : '+');
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x=60.*fabs(x);
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min=fmod(x,60.);
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x=(x-min)/60.;
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// deg=fmod(x,60.);
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deg=x;
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if (type==0)
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fmin=1000.0*(min-floor(min));
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else
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fmin=100.0*(min-floor(min));
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if (type==0)
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sprintf(s,"%02.0f%02.0f%03.0f",deg,floor(min),fmin);
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else
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sprintf(s,"%c%02.0f%02.0f%02.0f",sign,deg,floor(min),fmin);
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return;
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}
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// Compute Julian Day from Date
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double date2mjd(int year,int month,double day)
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{
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int a,b;
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double jd;
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if (month<3) {
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year--;
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month+=12;
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}
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a=floor(year/100.);
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b=2.-a+floor(a/4.);
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if (year<1582) b=0;
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if (year==1582 && month<10) b=0;
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if (year==1852 && month==10 && day<=4) b=0;
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jd=floor(365.25*(year+4716))+floor(30.6001*(month+1))+day+b-1524.5;
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return jd-2400000.5;
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}
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// MJD to DOY
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double mjd2doy(double mjd,int *yr)
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{
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int year,month,k=2;
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int day;
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double doy;
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char nfd[32];
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mjd2date(mjd,nfd);
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sscanf(nfd,"%04d",&year);
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sscanf(nfd+4,"%02d",&month);
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sscanf(nfd+6,"%02d",&day);
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if (year%4==0 && year%400!=0)
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k=1;
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doy=floor(275.0*month/9.0)-k*floor((month+9.0)/12.0)+day-30;
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*yr=year;
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return doy;
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}
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// nfd2mjd
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double nfd2mjd(char *date)
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{
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int year,month,day,hour,min;
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double mjd,dday;
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float sec;
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sscanf(date,"'%04d-%02d-%02dT%02d:%02d:%f'",&year,&month,&day,&hour,&min,&sec);
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dday=day+hour/24.0+min/1440.0+sec/86400.0;
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mjd=date2mjd(year,month,dday);
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return mjd;
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}
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void format_iod_line(struct observation *obs)
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{
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int mt,xt,mp,xp;
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char string[10];
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// Time format
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sprintf(string,"%7.1e",obs->terr);
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mt=string[0]-'0';
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xt=atoi(string+4)+8;
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// Position format
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if (obs->type==2) {
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sprintf(string,"%7.1e",obs->perr);
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mp=string[0]-'0';
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xp=atoi(string+4)+8;
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} else {
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printf("Position format not implemented!\n");
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}
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sprintf(obs->iod_line,"%05d %c%c %-6s %04d %c %-17s %d%d %d%d %-14s %d%d %c",
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obs->satno,
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obs->desig[0],obs->desig[1],
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obs->desig+2,
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obs->cospar,
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obs->conditions,
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obs->nfd,
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mt,xt,
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obs->type,obs->epoch,
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obs->pos,
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mp,xp,
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obs->behavior);
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return;
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}
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void find_designation(int satno0,char *desig0)
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{
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FILE *file;
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int satno;
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char desig[16];
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char *env,filename[128];
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// Environment variables
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env=getenv("ST_DATADIR");
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sprintf(filename,"%s/data/desig.txt",env);
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file=fopen(filename,"r");
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if (file==NULL) {
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fprintf(stderr,"Designation file not found!\n");
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exit(0);
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}
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while (!feof(file)) {
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fscanf(file,"%d %s",&satno,desig);
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if (satno==satno0) {
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strcpy(desig0,desig);
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break;
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}
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}
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fclose(file);
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return;
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}
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void write_observation(struct observation obs)
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{
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FILE *file;
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file=fopen("observations.txt","a");
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fprintf(file,"%s\n",obs.iod_line);
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fclose(file);
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printf("Observation written\n");
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return;
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}
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// Reduce point
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void reduce_point(struct observation *obs,struct image img,float tmid,float x,float y)
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{
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int iframe,k;
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double ra,de,rx,ry;
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float dx,dy,dt;
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double mjd,mjd1,mjd2;
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char nfd[32],sra[15],sde[15];
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// Transform position
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dx=x-img.x0;
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dy=y-img.y0;
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rx=img.a[0]+img.a[1]*dx+img.a[2]*dy;
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ry=img.b[0]+img.b[1]*dx+img.b[2]*dy;
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reverse(img.ra0,img.de0,rx,ry,&ra,&de);
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// Correct for stationary camera
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mjd1=img.mjd+0.5*(double) img.exptime/86400.0;
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mjd2=img.mjd+(double) tmid/86400.0;
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ra+=gmst(mjd2)-gmst(mjd1);
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dec2sex(ra/15.0,sra,0);
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dec2sex(de,sde,1);
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// Get time
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mjd=img.mjd+(double) tmid/86400.0;
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mjd2date(mjd,nfd);
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// Copy
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strcpy(obs->nfd,nfd);
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sprintf(obs->pos,"%s%s",sra,sde);
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return;
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}
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struct image maximum_image(struct image *raw,int n)
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{
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int i,j,k,l;
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float max,s1,s2;
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struct image img;
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printf("%d\n",n);
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img.naxis1=raw[0].naxis1;
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img.naxis2=raw[0].naxis2;
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img.z=(float *) malloc(sizeof(float) * img.naxis1*img.naxis2);
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for (i=0;i<img.naxis1*img.naxis2;i++) {
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for (j=0,max=0.0;j<n;j++)
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if (raw[j].z[i]>max)
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max=raw[j].z[i];
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img.z[i]=max;
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}
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// Get levels
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for (i=0,s1=0.0,s2=0.0;i<img.naxis1*img.naxis2;i++)
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s1+=img.z[i];
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img.avg=s1/(float) (img.naxis1*img.naxis2);
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for (i=0,s1=0.0,s2=0.0;i<img.naxis1*img.naxis2;i++)
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s2+=pow(img.z[i]-img.avg,2);
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img.std=sqrt(s2/(float) (img.naxis1*img.naxis2-1));
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img.zmin=img.avg-4.0*img.std;
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img.zmax=img.avg+12.0*img.std;
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// Fake
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strcpy(img.filename,"fake");
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img.mjd=56000.0;
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strcpy(img.nfd," 2013-01-01T00:00:00.000");
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img.cospar=0;
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img.exptime=0.0;
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img.ra0=0.0;
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img.de0=0.0;
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img.x0=0.0;
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img.y0=0.0;
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for (i=0;i<3;i++) {
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img.a[i]=0.0;
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img.b[i]=0.0;
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}
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img.xrms=0.0;
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img.yrms=0.0;
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return img;
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}
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int main(int argc,char *argv[])
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{
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int i,iimg=0,nimg;
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float xmin,xmax,ymin,ymax,zmin,zmax;
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float tr[]={-0.5,1.0,0.0,-0.5,0.0,1.0};
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float heat_l[] = {0.0, 0.2, 0.4, 0.6, 1.0};
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float heat_r[] = {0.0, 0.5, 1.0, 1.0, 1.0};
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float heat_g[] = {0.0, 0.0, 0.5, 1.0, 1.0};
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float heat_b[] = {0.0, 0.0, 0.0, 0.3, 1.0};
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int redraw=1,plotobj=1,click=0,nselect=0;
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float x,y,width;
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char c,pixcat[LIM],text[128];
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struct catalog cat,ast;
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float sx,sy,q;
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char *env,idfile[128];
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float r,rmin=1.0,rmax=10.0,mmin=1.0,mmax=8.0,mag=8.0;
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struct observation obs;
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double mjd,doy;
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int year;
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float frac=0.5;
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float fx=0.5,fy=0.333;
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int ix=0,iy=0;
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struct image *img;
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// Environment variables
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env=getenv("ST_DATADIR");
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// Number of images
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nimg=argc;
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// Allocate
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img=(struct image *) malloc(sizeof(struct image)*nimg);
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// Read image
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for (i=0;i<nimg-1;i++)
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img[i]=read_fits(argv[i+1],0);
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img[nimg-1]=maximum_image(img,nimg-1);
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// Set image aspect
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fx=0.5;
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fy=0.25*img[0].naxis1/img[0].naxis2;
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// Default observation
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obs.satno=99999;
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strcpy(obs.desig,"99999U");
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obs.cospar=atoi(env);
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obs.conditions='G';
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strcpy(obs.nfd,"YYYYMMDDHHMMSSsss");
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obs.terr=0.2;
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strcpy(obs.pos,"HHMMmmm+DDMMmm");
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strcpy(obs.iod_line,"");
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obs.perr=0.1;
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obs.epoch=5;
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obs.type=2;
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obs.behavior='S';
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obs.state=0;
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obs.cospar=img[0].cospar;
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// Get fake designation
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mjd=nfd2mjd(img[0].nfd);
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doy=mjd2doy(mjd,&year);
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sprintf(obs.desig,"%02d%03.0lfA",year-2000,doy+500);
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// Open server
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cpgopen("/xs");
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// cpgpap(0.,1.25);
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cpgask(0);
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cpgsch(0.8);
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// Default limits
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width=(img[0].naxis1>img[0].naxis2) ? img[0].naxis1 : img[0].naxis2;
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xmin=0.0;
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xmax=img[0].naxis1;
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ymin=0.0;
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ymax=img[0].naxis2;
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// Forever loop
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for (;;) {
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if (redraw==1) {
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cpgeras();
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cpgsci(1);
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cpgsvp(0.1,0.9,0.1,0.85);
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|
cpgwnad(xmin,xmax,ymin,ymax);
|
|
cpglab("x (pix)","y (pix)"," ");
|
|
cpgsfs(2);
|
|
cpgctab (heat_l,heat_r,heat_g,heat_b,5,1.0,0.5);
|
|
|
|
sprintf(text,"File: %s; UT Date: %.23s COSPAR ID: %04d",img[iimg].filename,img[iimg].nfd+1,img[iimg].cospar);
|
|
cpgmtxt("T",6.0,0.0,0.0,text);
|
|
sprintf(text,"R.A.: %10.5f (%4.1f'') Decl.: %10.5f (%4.1f'')",img[iimg].ra0,img[iimg].xrms,img[iimg].de0,img[iimg].yrms);
|
|
cpgmtxt("T",4.8,0.0,0.0,text);
|
|
sprintf(text,"FoV: %.2f\\(2218)x%.2f\\(2218) Scale: %.2f''x%.2f'' pix\\u-1\\d",img[iimg].naxis1*sqrt(img[iimg].a[1]*img[iimg].a[1]+img[iimg].b[1]*img[iimg].b[1])/3600.0,img[iimg].naxis2*sqrt(img[iimg].a[2]*img[iimg].a[2]+img[iimg].b[2]*img[iimg].b[2])/3600.0,sqrt(img[iimg].a[1]*img[iimg].a[1]+img[iimg].b[1]*img[iimg].b[1]),sqrt(img[iimg].a[2]*img[iimg].a[2]+img[iimg].b[2]*img[iimg].b[2]));
|
|
cpgmtxt("T",3.6,0.0,0.0,text);
|
|
|
|
zmin=img[iimg].zmin;
|
|
zmax=img[iimg].zmax;
|
|
|
|
cpgimag(img[iimg].z,img[iimg].naxis1,img[iimg].naxis2,1,img[iimg].naxis1,1,img[iimg].naxis2,zmin,zmax,tr);
|
|
cpgbox("BCTSNI",0.,0,"BCTSNI",0.,0);
|
|
|
|
// Plot fit
|
|
if (obs.state==1) {
|
|
cpgsci(4);
|
|
cpgpt1(obs.x[0],obs.y[0],4);
|
|
cpgmove(obs.x[1],obs.y[1]);
|
|
cpgdraw(obs.x[2],obs.y[2]);
|
|
cpgsci(1);
|
|
} else if (obs.state==2) {
|
|
cpgsci(4);
|
|
cpgpt1(obs.x[0],obs.y[0],4);
|
|
cpgsci(1);
|
|
}
|
|
|
|
if (plotobj==1) {
|
|
if (iimg<nimg-2) {
|
|
sprintf(idfile,"%s.id",img[iimg].filename);
|
|
plot_objects(idfile);
|
|
} else if (iimg==nimg-1) {
|
|
for (i=0;i<nimg-1;i++) {
|
|
sprintf(idfile,"%s.id",img[i].filename);
|
|
plot_objects(idfile);
|
|
}
|
|
}
|
|
}
|
|
|
|
format_iod_line(&obs);
|
|
cpgmtxt("T",1.0,0.5,0.5,obs.iod_line);
|
|
|
|
redraw=0;
|
|
}
|
|
|
|
// Get cursor
|
|
cpgcurs(&x,&y,&c);
|
|
|
|
// Quit
|
|
if (c=='q')
|
|
break;
|
|
|
|
// Change fraction
|
|
if (c=='e') {
|
|
if (frac>0.49 && frac<0.51)
|
|
frac=1.0;
|
|
else if (frac>0.51)
|
|
frac=0.0;
|
|
else if (frac<0.49)
|
|
frac=0.5;
|
|
printf("Fraction: %.1f\n",frac);
|
|
}
|
|
|
|
if (c=='p' || c=='X') {
|
|
if (plotobj==1)
|
|
plotobj=0;
|
|
else
|
|
plotobj=1;
|
|
redraw=1;
|
|
}
|
|
|
|
// Get designation
|
|
if (c=='d') {
|
|
printf("Provide satellite number: ");
|
|
scanf("%d",&obs.satno);
|
|
find_designation(obs.satno,obs.desig);
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Center
|
|
if (c=='c') {
|
|
xmin=x-fx*width;
|
|
xmax=x+fx*width;
|
|
ymin=y-fy*width;
|
|
ymax=y+fy*width;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
if (isdigit(c)) {
|
|
width=1000.0/(c-'0');
|
|
xmin=x-fx*width;
|
|
xmax=x+fx*width;
|
|
ymin=y-fy*width;
|
|
ymax=y+fy*width;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Cycle through images
|
|
if (c==']') {
|
|
iimg++;
|
|
if (iimg>=nimg-1)
|
|
iimg=0;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Cycle through images
|
|
if (c=='[') {
|
|
iimg--;
|
|
if (iimg<0)
|
|
iimg=nimg-2;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Maximum image
|
|
if (c=='o') {
|
|
iimg=nimg-1;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Cycle through image
|
|
if (c=='\t') {
|
|
printf("%d %d\n",ix,iy);
|
|
|
|
// Set area
|
|
width=500;
|
|
x=width*(ix+0.5);
|
|
y=width*(iy+0.5);
|
|
xmin=x-1.5*fx*width;
|
|
xmax=x+1.5*fx*width;
|
|
ymin=y-1.5*fy*width;
|
|
ymax=y+1.5*fy*width;
|
|
|
|
// Increment
|
|
ix++;
|
|
if (width*ix>img[iimg].naxis1) {
|
|
ix=0;
|
|
iy++;
|
|
}
|
|
if (width*iy>img[iimg].naxis2) {
|
|
ix=0;
|
|
iy=0;
|
|
}
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
|
|
|
|
// Zoom
|
|
if (c=='z' || c=='+') {
|
|
width/=1.5;
|
|
xmin=x-fx*width;
|
|
xmax=x+fx*width;
|
|
ymin=y-fy*width;
|
|
ymax=y+fy*width;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Unzoom
|
|
if (c=='x' || c=='+' || c=='=') {
|
|
width*=1.5;
|
|
xmin=x-fx*width;
|
|
xmax=x+fx*width;
|
|
ymin=y-fy*width;
|
|
ymax=y+fy*width;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Reset
|
|
if (c=='r') {
|
|
width=(img[iimg].naxis1>img[iimg].naxis2) ? img[iimg].naxis1 : img[iimg].naxis2;
|
|
xmin=0.0;
|
|
xmax=img[iimg].naxis1;
|
|
ymin=0.0;
|
|
ymax=img[iimg].naxis2;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Reset
|
|
if (c=='R') {
|
|
width=(img[iimg].naxis1>img[iimg].naxis2) ? img[iimg].naxis1 : img[iimg].naxis2;
|
|
xmin=0.0;
|
|
xmax=img[iimg].naxis1;
|
|
ymin=0.0;
|
|
ymax=img[iimg].naxis2;
|
|
iimg=0;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
|
|
// Write obs
|
|
if (c=='w') {
|
|
write_observation(obs);
|
|
continue;
|
|
}
|
|
|
|
// Measure
|
|
if (c=='m' || c=='D') {
|
|
reduce_point(&obs,img[iimg],frac*img[iimg].exptime,x,y);
|
|
obs.x[0]=x;
|
|
obs.y[0]=y;
|
|
obs.state=2;
|
|
redraw=1;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
cpgend();
|
|
|
|
free(img);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Read fits image
|
|
struct image read_fits(char *filename,int pnum)
|
|
{
|
|
int i,j,k,l,m;
|
|
qfitsloader ql;
|
|
char key[FITS_LINESZ+1] ;
|
|
struct image img;
|
|
float s1,s2,avg,std;
|
|
|
|
// Set plane
|
|
ql.xtnum = 0;
|
|
ql.pnum = pnum;
|
|
|
|
// Set loadtype
|
|
ql.ptype = PTYPE_FLOAT;
|
|
|
|
// Set filename
|
|
ql.filename=filename;
|
|
|
|
// Set filename
|
|
strcpy(img.filename,filename);
|
|
|
|
// Image size
|
|
img.naxis1=atoi(qfits_query_hdr(filename,"NAXIS1"));
|
|
img.naxis2=atoi(qfits_query_hdr(filename,"NAXIS2"));
|
|
|
|
// MJD
|
|
img.mjd=atof(qfits_query_hdr(filename,"MJD-OBS"));
|
|
strcpy(img.nfd,qfits_query_hdr(filename,"DATE-OBS"));
|
|
img.exptime=atof(qfits_query_hdr(filename,"EXPTIME"));
|
|
|
|
// COSPAR ID
|
|
img.cospar=atoi(qfits_query_hdr(filename,"COSPAR"));
|
|
|
|
// Transformation
|
|
img.mjd=atof(qfits_query_hdr(filename,"MJD-OBS"));
|
|
img.ra0=atof(qfits_query_hdr(filename,"CRVAL1"));
|
|
img.de0=atof(qfits_query_hdr(filename,"CRVAL2"));
|
|
img.x0=atof(qfits_query_hdr(filename,"CRPIX1"));
|
|
img.y0=atof(qfits_query_hdr(filename,"CRPIX2"));
|
|
img.a[0]=0.0;
|
|
img.a[1]=3600.0*atof(qfits_query_hdr(filename,"CD1_1"));
|
|
img.a[2]=3600.0*atof(qfits_query_hdr(filename,"CD1_2"));
|
|
img.b[0]=0.0;
|
|
img.b[1]=3600.0*atof(qfits_query_hdr(filename,"CD2_1"));
|
|
img.b[2]=3600.0*atof(qfits_query_hdr(filename,"CD2_2"));
|
|
img.xrms=3600.0*atof(qfits_query_hdr(filename,"CRRES1"));
|
|
img.yrms=3600.0*atof(qfits_query_hdr(filename,"CRRES2"));
|
|
|
|
// Initialize load
|
|
if (qfitsloader_init(&ql) != 0)
|
|
printf("Error initializing data loading\n");
|
|
|
|
// Test load
|
|
if (qfits_loadpix(&ql) != 0)
|
|
printf("Error loading actual data\n");
|
|
|
|
// Allocate image memory
|
|
img.z=(float *) malloc(sizeof(float) * img.naxis1*img.naxis2);
|
|
|
|
// Fill z array
|
|
for (i=0,l=0,m=0;i<img.naxis1;i++) {
|
|
for (j=0;j<img.naxis2;j++) {
|
|
img.z[l]=ql.fbuf[l];
|
|
l++;
|
|
}
|
|
}
|
|
|
|
// Get levels
|
|
for (i=0,s1=0.0,s2=0.0;i<img.naxis1*img.naxis2;i++)
|
|
s1+=img.z[i];
|
|
img.avg=s1/(float) (img.naxis1*img.naxis2);
|
|
for (i=0,s1=0.0,s2=0.0;i<img.naxis1*img.naxis2;i++)
|
|
s2+=pow(img.z[i]-img.avg,2);
|
|
img.std=sqrt(s2/(float) (img.naxis1*img.naxis2-1));
|
|
img.zmin=img.avg-4.0*img.std;
|
|
img.zmax=img.avg+12.0*img.std;
|
|
|
|
return img;
|
|
}
|
|
|
|
|
|
// Read a line of maximum length int lim from file FILE into string s
|
|
int fgetline(FILE *file,char *s,int lim)
|
|
{
|
|
int c,i=0;
|
|
|
|
while (--lim > 0 && (c=fgetc(file)) != EOF && c != '\n')
|
|
s[i++] = c;
|
|
if (c == '\n')
|
|
s[i++] = c;
|
|
s[i] = '\0';
|
|
return i;
|
|
}
|
|
|
|
|
|
// Select nearest object
|
|
int select_nearest(struct catalog c,float x,float y)
|
|
{
|
|
int i,imin;
|
|
float r,rmin;
|
|
|
|
for (i=0;i<c.n;i++) {
|
|
r=sqrt(pow(x-c.x[i],2)+pow(y-c.y[i],2));
|
|
if (i==0 || r<rmin) {
|
|
imin=i;
|
|
rmin=r;
|
|
}
|
|
}
|
|
|
|
return imin;
|
|
}
|
|
|