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sattools/src/measure.c

1074 lines
22 KiB
C
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <ctype.h>
#include "qfits.h"
#include <cpgplot.h>
#include <wcslib/cel.h>
#include <gsl/gsl_multifit.h>
#define LIM 256
#define NMAX 8192
#define D2R M_PI/180.0
#define R2D 180.0/M_PI
struct star {
double ra,de;
float pmra,pmde;
float mag;
};
struct image {
int naxis1,naxis2,naxis3;
float *z;
float zmin,zmax;
double ra0,de0;
float avg,std;
float x0,y0;
float a[3],b[3],xrms,yrms;
float exptime;
double mjd;
char nfd[32],filename[32];
int cospar,tracked;
} ;
struct catalog {
int n;
float x[NMAX],y[NMAX],mag[NMAX];
double ra[NMAX],de[NMAX],rx[NMAX],ry[NMAX];
int select[NMAX];
};
struct observation {
int satno,cospar;
char desig[16],conditions,behavior;
double mjd,ra,de;
float terr,perr,tmid;
char nfd[32],pos[32];
int epoch,type;
char iod_line[80];
float x[3],y[3];
int state;
};
struct aperture {
float x,y,r1,r2;
};
struct image read_fits(char *filename,int pnum);
int fgetline(FILE *file,char *s,int lim);
int select_nearest(struct catalog c,float x,float y);
void reverse(double ra0,double de0,double x,double y,double *ra,double *de);
void plot_defects(void)
{
FILE *file;
char *env,filename[128];
float x,y;
char line[LIM];
// Environment variables
env=getenv("ST_DATADIR");
sprintf(filename,"%s/data/defects.txt",env);
file=fopen(filename,"r");
if (file==NULL) {
fprintf(stderr,"Defects file not found!\n");
return;
}
cpgsci(7);
while (fgetline(file,line,LIM)>0) {
sscanf(line,"%f %f",&x,&y);
cpgpt1(x,y,19);
}
fclose(file);
cpgsci(1);
return;
}
void log_defects(float x,float y)
{
FILE *file;
char *env,filename[128];
// Environment variables
env=getenv("ST_DATADIR");
sprintf(filename,"%s/data/defects.txt",env);
file=fopen(filename,"a");
if (file==NULL) {
fprintf(stderr,"Defects file not found!\n");
return;
}
fprintf(file,"%4.0f %4.0f\n",x,y);
fclose(file);
return;
}
// Return x modulo y [0,y)
double modulo(double x,double y)
{
x=fmod(x,y);
if (x<0.0) x+=y;
return x;
}
// Greenwich Mean Sidereal Time
double gmst(double mjd)
{
double t,gmst;
t=(mjd-51544.5)/36525.0;
gmst=modulo(280.46061837+360.98564736629*(mjd-51544.5)+t*t*(0.000387933-t/38710000),360.0);
return gmst;
}
void plot_objects(char *filename)
{
int i;
FILE *file;
float x0,y0,x1,y1,texp;
int id;
char line[LIM],catalog[128],dummy[128],text[8];
file=fopen(filename,"r");
if (file==NULL)
return;
while (fgetline(file,line,LIM)>0) {
sscanf(line,"%s %f %f %f %f %f %d %s",dummy,&x0,&y0,&x1,&y1,&texp,&id,catalog);
cpgsci(0);
if (strstr(catalog,"classfd")!=NULL)
cpgsci(4);
if (strstr(catalog,"inttles")!=NULL)
cpgsci(3);
if (strstr(catalog,"jsc")!=NULL)
cpgsci(5);
cpgmove(x0,y0);
cpgdraw(x1,y1);
cpgpt1(x0,y0,4);
sprintf(text," %05d",id);
cpgtext(x0,y0,text);
}
fclose(file);
cpgsci(1);
return;
}
// Compute Date from Julian Day
void mjd2date(double mjd,char *date)
{
double f,jd,dday;
int z,alpha,a,b,c,d,e;
double year,month,day,hour,min;
double sec,x,fsec;
jd=mjd+2400000.5;
jd+=0.5;
z=floor(jd);
f=fmod(jd,1.);
if (z<2299161)
a=z;
else {
alpha=floor((z-1867216.25)/36524.25);
a=z+1+alpha-floor(alpha/4.);
}
b=a+1524;
c=floor((b-122.1)/365.25);
d=floor(365.25*c);
e=floor((b-d)/30.6001);
dday=b-d-floor(30.6001*e)+f;
if (e<14)
month=e-1;
else
month=e-13;
if (month>2)
year=c-4716;
else
year=c-4715;
day=(int) floor(dday);
x=24.0*(dday-day);
x=3600.*fabs(x);
sec=fmod(x,60.);
x=(x-sec)/60.;
min=fmod(x,60.);
x=(x-min)/60.;
hour=x;
fsec=floor(1000.0*(sec-floor(sec)));
sprintf(date,"%04d%02d%02d%02d%02d%02.0f%03.0f",(int) year,(int) month,(int) day,(int) hour,(int) min,floor(sec),fsec);
return;
}
// Convert Decimal into Sexagesimal
void dec2s(double x,char *s,int type)
{
int i;
double sec,deg,min,fmin;
char sign;
sign=(x<0 ? '-' : '+');
x=60.*fabs(x);
min=fmod(x,60.);
x=(x-min)/60.;
// deg=fmod(x,60.);
deg=x;
if (type==0)
fmin=floor(1000.0*(min-floor(min)));
else
fmin=floor(100.0*(min-floor(min)));
if (type==0)
sprintf(s,"%02.0f%02.0f%03.0f",deg,floor(min),fmin);
else
sprintf(s,"%c%02.0f%02.0f%02.0f",sign,deg,floor(min),fmin);
return;
}
// Compute Julian Day from Date
double date2mjd(int year,int month,double day)
{
int a,b;
double jd;
if (month<3) {
year--;
month+=12;
}
a=floor(year/100.);
b=2.-a+floor(a/4.);
if (year<1582) b=0;
if (year==1582 && month<10) b=0;
if (year==1582 && month==10 && day<=4) b=0;
jd=floor(365.25*(year+4716))+floor(30.6001*(month+1))+day+b-1524.5;
return jd-2400000.5;
}
// MJD to DOY
double mjd2doy(double mjd,int *yr)
{
int year,month,k=2;
int day;
double doy;
char nfd[32];
mjd2date(mjd,nfd);
sscanf(nfd,"%04d",&year);
sscanf(nfd+4,"%02d",&month);
sscanf(nfd+6,"%02d",&day);
if (year%4==0 && year%400!=0)
k=1;
doy=floor(275.0*month/9.0)-k*floor((month+9.0)/12.0)+day-30;
*yr=year;
return doy;
}
// nfd2mjd
double nfd2mjd(char *date)
{
int year,month,day,hour,min;
double mjd,dday;
float sec;
sscanf(date,"'%04d-%02d-%02dT%02d:%02d:%f'",&year,&month,&day,&hour,&min,&sec);
dday=day+hour/24.0+min/1440.0+sec/86400.0;
mjd=date2mjd(year,month,dday);
return mjd;
}
void format_iod_line(struct observation *obs)
{
int mt,xt,mp,xp;
char string[10];
// Time format
sprintf(string,"%7.1e",obs->terr);
mt=string[0]-'0';
xt=atoi(string+4)+8;
// Position format
if (obs->type==2) {
sprintf(string,"%7.1e",obs->perr);
mp=string[0]-'0';
xp=atoi(string+4)+8;
} else {
printf("Position format not implemented!\n");
}
sprintf(obs->iod_line,"%05d %c%c %-6s %04d %c %-17s %d%d %d%d %-14s %d%d %c",
obs->satno,
obs->desig[0],obs->desig[1],
obs->desig+2,
obs->cospar,
obs->conditions,
obs->nfd,
mt,xt,
obs->type,obs->epoch,
obs->pos,
mp,xp,
obs->behavior);
return;
}
void find_designation(int satno0,char *desig0)
{
FILE *file;
int satno;
char desig[16];
char *env,filename[128];
// Environment variables
env=getenv("ST_DATADIR");
sprintf(filename,"%s/data/desig.txt",env);
file=fopen(filename,"r");
if (file==NULL) {
fprintf(stderr,"Designation file not found!\n");
exit(0);
}
while (!feof(file)) {
fscanf(file,"%d %s",&satno,desig);
if (satno==satno0) {
strcpy(desig0,desig);
break;
}
}
fclose(file);
return;
}
void write_observation(struct observation obs)
{
FILE *file;
file=fopen("observations.txt","a");
fprintf(file,"%s\n",obs.iod_line);
fclose(file);
printf("Observation written\n");
return;
}
void aperture_photometry(struct image img,struct aperture ap)
{
int i,j,k,n1,n2;
float s1,ss1,s2,ss2;
float dx,dy,x,y,r;
float f1,f2;
double mjd;
mjd=img.mjd+0.5*(double) img.exptime/86400.0;
s1=0.0;
ss1=0.0;
s2=0.0;
ss2=0.0;
n1=0;
n2=0;
for (i=0;i<img.naxis1;i++) {
x=(float) i;
for (j=0;j<img.naxis2;j++) {
k=i+img.naxis1*j;
y=(float) j;
dx=x-ap.x;
dy=y-ap.y;
r=sqrt(dx*dx+dy*dy);
if (r<ap.r1) {
s1+=img.z[k];
ss1+=img.z[k]*img.z[k];
n1++;
} else if (r>=ap.r1 && r<ap.r2) {
s2+=img.z[k];
ss2+=img.z[k]*img.z[k];
n2++;
}
}
}
f1=s1/(float) n1;
f2=s2/(float) n2;
printf("%lf %8.3f %8.3f %.0f %d %.0f %d %f\n",mjd,ap.x,ap.y,s1,n1,s2,n2,f1-f2);
return;
}
// Reduce point
void reduce_point(struct observation *obs,struct image img,float tmid,float x,float y)
{
int iframe,k;
double ra,de,rx,ry;
float dx,dy,dt;
double mjd,mjd1,mjd2;
char nfd[32],sra[15],sde[15];
// Transform position
dx=x-img.x0;
dy=y-img.y0;
rx=img.a[0]+img.a[1]*dx+img.a[2]*dy;
ry=img.b[0]+img.b[1]*dx+img.b[2]*dy;
reverse(img.ra0,img.de0,rx,ry,&ra,&de);
// Correct for stationary camera
if (img.tracked==0) {
mjd1=img.mjd+0.5*(double) img.exptime/86400.0;
mjd2=img.mjd+(double) tmid/86400.0;
ra+=gmst(mjd2)-gmst(mjd1);
}
dec2s(ra/15.0,sra,0);
dec2s(de,sde,1);
// Get time
mjd=img.mjd+(double) tmid/86400.0;
mjd2date(mjd,nfd);
// Copy
strcpy(obs->nfd,nfd);
sprintf(obs->pos,"%s%s",sra,sde);
return;
}
struct image maximum_image(struct image *raw,int n)
{
int i,j,k,l;
float max,s1,s2;
struct image img;
printf("%d\n",n);
img.naxis1=raw[0].naxis1;
img.naxis2=raw[0].naxis2;
img.z=(float *) malloc(sizeof(float) * img.naxis1*img.naxis2);
for (i=0;i<img.naxis1*img.naxis2;i++) {
for (j=0,max=0.0;j<n;j++)
if (raw[j].z[i]>max)
max=raw[j].z[i];
img.z[i]=max;
}
// 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;
// Fake
strcpy(img.filename,"fake");
img.mjd=56000.0;
strcpy(img.nfd," 2013-01-01T00:00:00.000");
img.cospar=0;
img.exptime=0.0;
img.ra0=0.0;
img.de0=0.0;
img.x0=0.0;
img.y0=0.0;
for (i=0;i<3;i++) {
img.a[i]=0.0;
img.b[i]=0.0;
}
img.xrms=0.0;
img.yrms=0.0;
return img;
}
// Read pixel catalog
struct catalog read_pixel_catalog(char *filename)
{
int i=0;
FILE *file;
char line[LIM];
struct catalog c;
// Read catalog
file=fopen(filename,"r");
if (file==NULL) {
fprintf(stderr,"%s not found!\n",filename);
exit(0);
}
while (fgetline(file,line,LIM)>0) {
if (i>=NMAX)
break;
if (strstr(line,"#")!=NULL)
continue;
sscanf(line,"%f %f %f",&c.x[i],&c.y[i],&c.mag[i]);
c.select[i]=0;
i++;
}
fclose(file);
c.n=i;
return c;
}
int main(int argc,char *argv[])
{
int i,iimg=0,nimg;
float xmin,xmax,ymin,ymax,zmin,zmax;
float tr[]={-0.5,1.0,0.0,-0.5,0.0,1.0};
float heat_l[] = {0.0, 0.2, 0.4, 0.6, 1.0};
float heat_r[] = {0.0, 0.5, 1.0, 1.0, 1.0};
float heat_g[] = {0.0, 0.0, 0.5, 1.0, 1.0};
float heat_b[] = {0.0, 0.0, 0.0, 0.3, 1.0};
int redraw=1,plotobj=1,click=0,nselect=0,plotcat=0;
float x,y,width;
char c,pixcat[128],text[128];
struct catalog cat,ast;
float sx,sy,q;
char *env,idfile[128];
float r,rmin=1.0,rmax=10.0,mmin=1.0,mmax=8.0,mag=8.0;
struct observation obs;
double mjd,doy;
int year;
float frac=0.5;
float fx=0.5,fy=0.5;
int ix=0,iy=0,istar;
struct image *img;
struct aperture ap;
// Environment variables
env=getenv("ST_DATADIR");
// Number of images
nimg=argc;
// Allocate
img=(struct image *) malloc(sizeof(struct image)*nimg);
// Read image
for (i=0;i<nimg-1;i++)
img[i]=read_fits(argv[i+1],0);
img[nimg-1]=maximum_image(img,nimg-1);
// Set image aspect
fx=0.5;
fy=fx * img[0].naxis2/img[0].naxis1;
printf("%f %f\n",fx,fy);
// Default observation
obs.satno=99999;
strcpy(obs.desig,"99999U");
obs.cospar=atoi(env);
obs.conditions='G';
strcpy(obs.nfd,"YYYYMMDDHHMMSSsss");
obs.terr=0.2;
strcpy(obs.pos,"HHMMmmm+DDMMmm");
strcpy(obs.iod_line,"");
obs.perr=0.1;
obs.epoch=5;
obs.type=2;
obs.behavior='S';
obs.state=0;
obs.cospar=img[0].cospar;
// Get fake designation
mjd=nfd2mjd(img[0].nfd);
doy=mjd2doy(mjd,&year);
sprintf(obs.desig,"%02d%03.0lfA",year-2000,doy+500);
// Open server
cpgopen("/xs");
cpgask(0);
cpgsch(0.8);
// Default limits
width=(img[0].naxis1>img[0].naxis2) ? img[0].naxis1 : img[0].naxis2;
xmin=0.0;
xmax=img[0].naxis1;
ymin=0.0;
ymax=img[0].naxis2;
// Default aperture
ap.x=0.0;
ap.y=0.0;
ap.r1=5.0;
ap.r2=10.0;
// Forever loop
for (;;) {
if (redraw!=0) {
if (redraw==1)
cpgpage();
cpgsci(1);
cpgsvp(0.1,0.9,0.1,0.85);
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 %d: %s; UT Date: %.23s COSPAR ID: %04d",iimg+1,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 Fraction: %.1f",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]),frac);
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-1) {
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);
// Read pixel catalog
if (plotcat==1) {
if (iimg<nimg-1) {
sprintf(pixcat,"%s.cat",img[iimg].filename);
cat=read_pixel_catalog(pixcat);
// Plot stars
cpgsci(3);
for (i=0;i<cat.n;i++)
cpgpt1(cat.x[i],cat.y[i],6);
cpgsci(1);
}
}
// Plot aperture
if (ap.x>0.0 && ap.y>0.0) {
cpgsci(3);
cpgcirc(ap.x,ap.y,ap.r1);
cpgcirc(ap.x,ap.y,ap.r2);
cpgsci(1);
}
plot_defects();
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);
redraw=1;
}
if (c=='p' || c=='X') {
if (plotobj==1)
plotobj=0;
else
plotobj=1;
redraw=1;
}
// Mark bad pixel
if (c=='t') {
log_defects(x,y);
redraw=1;
}
// Plot catalog
if (c=='l') {
if (plotcat==1)
plotcat=0;
else
plotcat=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==']' || c=='s') {
iimg++;
if (iimg>=nimg-1)
iimg=0;
if (c==']')
redraw=2;
else
redraw=1;
continue;
}
// Cycle through images
if (c=='[' || c=='a') {
iimg--;
if (iimg<0)
iimg=nimg-2;
if (c=='[')
redraw=2;
else
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=750;
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=='+' || 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=='-') {
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;
obs.satno=99999;
strcpy(obs.desig,"99999U");
obs.cospar=atoi(env);
obs.conditions='G';
strcpy(obs.nfd,"YYYYMMDDHHMMSSsss");
obs.terr=0.2;
strcpy(obs.pos,"HHMMmmm+DDMMmm");
strcpy(obs.iod_line,"");
obs.perr=0.1;
obs.epoch=5;
obs.type=2;
obs.behavior='S';
obs.state=0;
obs.cospar=img[0].cospar;
// Get fake designation
mjd=nfd2mjd(img[0].nfd);
doy=mjd2doy(mjd,&year);
sprintf(obs.desig,"%02d%03.0lfA",year-2000,doy+500);
redraw=1;
continue;
}
// Write obs
if (c=='w') {
write_observation(obs);
continue;
}
// Measure
if (c=='m' || c=='D') {
// istar=select_nearest(cat,x,y);
// printf("%f %f -> %f %f %f\n",x,y,cat.x[istar],cat.y[istar],cat.mag[istar]);
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;
}
// Aperture photometry
if (c=='g') {
ap.x=x;
ap.y=y;
aperture_photometry(img[iimg],ap);
redraw=1;
continue;
}
// Help
if (c=='h') {
printf("q Quit\n");
printf("e Change of exposure (0.0 = start, 0.5 = middle, 1.0 = end)\n");
printf("p (right) Plot objects\n");
printf("l Plot star catalog\n");
printf("d Set object NORAD designation\n");
printf("c Center on cursor\n");
printf("0-9 Set zoom level\n");
printf("s/] Cycle through images forward\n");
printf("a/[ Cycle through images backward\n");
printf("o Show maximum pixels of all images\n");
printf("TAB Cycle through frame at current zoom level\n");
printf("z/+ Zoom in on cursor\n");
printf("x/- Zoom out on cursor\n");
printf("r Reset zoom\n");
printf("R Reset setup\n");
printf("w Write IOD observation\n");
printf("m (mid) measure position\n");
}
}
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=(double) 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"));
// Tracked
if (qfits_query_hdr(filename,"TRACKED")!=NULL)
img.tracked=atoi(qfits_query_hdr(filename,"TRACKED"));
else
img.tracked=0;
// Transformation
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;
}
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