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rffit.c
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
#include <cpgplot.h>
#include <getopt.h>
#include "sgdp4h.h"
#include "rfsites.h"
#include "rftles.h"
#define LIM 80
#define NMAX 1024
#define D2R M_PI/180.0
#define R2D 180.0/M_PI
#define XKMPER 6378.137 // km
#define KG 0.07436680 // earth radii, earth masses, minutes
#define C 299792.458 // km/s
#define FLAT (1.0/298.257)
struct point {
char timestamp[24];
double mjd,freq,v,freq0;
float t,f,res;
float flux;
int flag; // 0 - deleted ("unselected"), 1 - not highlighted; 2 - highlighted
int site_id,rsite_id;
site_t s,r;
};
struct data {
int n;
struct point *p;
int fitfreq;
double mjdmin,mjdmax,mjd0,dmjd;
double freqmin,freqmax,fluxmin,fluxmax,f0,ffit;
char *satname;
} d;
orbit_t orb;
int fgetline(FILE *file,char *s,int lim);
struct data read_data(char *filename,int graves,float offset);
double date2mjd(int year,int month,double day);
void mjd2nfd(double mjd,char *nfd);
double nfd2mjd(char *date);
struct point decode_line(char *line);
double modulo(double,double);
double gmst(double);
double dgmst(double);
void obspos_xyz(double,site_t site,xyz_t *,xyz_t *);
int velocity(orbit_t orb,double mjd,site_t s,double *v,double *azi,double *alt);
double altitude(orbit_t orb,double mjd,site_t s);
void deselect_inside(float x0,float y0,float x,float y);
void highlight(float x0,float y0,float x,float y,int flag);
void deselect_outside(float xmin,float ymin,float xmax,float ymax);
void deselect_nearest(float x,float y,float xmin,float ymin,float xmax,float ymax);
void save_data(float xmin,float ymin,float xmax,float ymax,char *filename);
void equatorial2horizontal(double mjd,site_t s,double ra,double de,double *azi,double *alt);
double chisq(double a[]);
void versafit(int m,int n,double *a,double *da,double (*func)(double *),double dchisq,double tol,char *opt);
double compute_rms(void);
void mjd2date(double mjd,int *year,int *month,double *day);
void print_tle(orbit_t orb,char *filename,char *satname);
void search(void);
double fit_curve(orbit_t orb,int *ia);
double mjd2doy(double mjd,int *yr);
double doy2mjd(int year,double doy);
int identify_satellite_from_visibility(tle_array_t *tle_array, double altmin);
double compute_mean_mjd(void)
{
int i,flag,nsel;
double mjdmid,sum;
// Return midpoint of dataset if no points selected
for (i=0,nsel=0;i<d.n;i++)
if (d.p[i].flag==2)
nsel++;
if (nsel==0)
return 0.5*(d.mjdmin+d.mjdmax);
// Compute midpoint of selected points
for (i=0,sum=0.0;i<d.n;i++)
if (d.p[i].flag==2)
sum+=d.p[i].mjd;
mjdmid=sum/(float) nsel;
return mjdmid;
}
// Select diagonal
void diagonal_select(float x0,float y0,float x1,float y1,int flag)
{
int i;
float v;
float ymin,ymax;
printf("%f %f %f %f\n",x0,y0,x1,y1);
for (i=0;i<d.n;i++) {
v=(d.p[i].t-x0)/(x1-x0);
ymin=y0+v*(y1-y0)-3.0;
ymax=y0+v*(y1-y0)+3.0;
if (v>0.0 && v<1.0 && d.p[i].f>ymin && d.p[i].f<ymax && d.p[i].flag!=0)
d.p[i].flag=flag;
}
return;
}
void format_tle(orbit_t orb,char *line1,char *line2)
{
int i,csum;
char sbstar[]=" 00000-0",bstar[13];
char csumstr[2];
char satstr[6];
// Format Bstar term
if (fabs(orb.bstar)>1e-9) {
sprintf(bstar,"%11.4e",10*orb.bstar);
sbstar[0] = bstar[0]; sbstar[1] = bstar[1]; sbstar[2] = bstar[3]; sbstar[3] = bstar[4];
sbstar[4] = bstar[5]; sbstar[5] = bstar[6]; sbstar[6] = bstar[8]; sbstar[7] = bstar[10]; sbstar[8] = '\0';
}
// Print lines
number_to_alpha5(orb.satno,satstr);
satstr[5]='\0';
sprintf(line1,"1 %5sU %-8s %2d%012.8f .00000000 00000-0 %8s 0 0",satstr,orb.desig,orb.ep_year-2000,orb.ep_day,sbstar);
sprintf(line2,"2 %5s %8.4f %8.4f %07.0f %8.4f %8.4f %11.8f 0",satstr,DEG(orb.eqinc),DEG(orb.ascn),1E7*orb.ecc,DEG(orb.argp),DEG(orb.mnan),orb.rev);
// Compute checksums
for (i=0,csum=0;i<strlen(line1);i++) {
if (isdigit(line1[i]))
csum+=line1[i]-'0';
else if (line1[i]=='-')
csum++;
}
sprintf(csumstr,"%d",csum%10);
strcat(line1,csumstr);
for (i=0,csum=0;i<strlen(line2);i++) {
if (isdigit(line2[i]))
csum+=line2[i]-'0';
else if (line2[i]=='-')
csum++;
}
sprintf(csumstr,"%d",csum%10);
strcat(line2,csumstr);
return;
}
int identify_satellite_from_doppler(tle_array_t *tle_array, double rmsmax)
{
int i=0,flag=0;
double rms,rmsmin;
int ia[]={0,0,0,0,0,0};
int satno=0,imode;
double v,alt,azi,mjdmid;
char * satname = NULL;
// Loop over TLEs
for (long elem = 0; elem < tle_array->number_of_elements; elem++) {
// Get TLE
tle_t *tle = get_tle_by_index(tle_array, elem);
// Directly assign to global orb variable as even if the fit_curve below gets
// the orbit as parameter, fit_curve will call compute_rms without giving
// an orbit and the latter will use the global orb variable.
orb = tle->orbit;
d.satname = tle->name;
// Initialize
imode=init_sgdp4(&orb);
if (imode==SGDP4_ERROR) {
printf("Error with %d, skipping\n",orb.satno);
continue;
}
// velocity(orb,d.p[d.n/2].mjd,d.p[d.n/2].s,&v,&azi,&alt);
// if (alt<0.0)
// printf("Continue?\n");
// continue;
rms=fit_curve(orb,ia);
if (flag==0 || rms<rmsmin) {
rmsmin=rms;
satno=orb.satno;
satname = tle->name;
flag=1;
}
if (rms<rmsmax) {
if (tle->name) {
printf("%05d: %.3f kHz %.6f MHz | %s\n", orb.satno, tle->name, rms, d.ffit/1000.0, tle->name);
} else {
printf("%05d: %.3f kHz %.6f MHz\n", orb.satno, rms, d.ffit/1000.0);
}
i++;
}
}
// Plot results
if (i>0) {
if (satname) {
printf("Identified %d candidate(s), best fitting satellite is %05d - %s.\n", i, satno, satname);
} else {
printf("Identified %d candidate(s), best fitting satellite is %05d.\n", i, satno);
}
tle_t * tle = get_tle_by_catalog_id(tle_array, satno);
orb = tle->orbit;
d.satname = tle->name;
rms=fit_curve(orb,ia);
} else {
printf("No candidates found.\n");
satno=-1;
}
return satno;
}
int identify_satellite_from_visibility(tle_array_t *tle_array, double altmin)
{
int i=0,flag=0,nalt,nsel;
int satno=0,imode;
double alt,frac;
// Loop over TLEs
for (long elem = 0; elem < tle_array->number_of_elements; elem++) {
// Get TLE
tle_t * tle = get_tle_by_index(tle_array, elem);
// Directly assign to global orb variable as even if the fit_curve below gets
// the orbit as parameter, fit_curve will call compute_rms without giving
// an orbit and the latter will use the global orb variable.
orb = tle->orbit;
d.satname = tle->name;
// Initialize
imode=init_sgdp4(&orb);
if (imode==SGDP4_ERROR) {
printf("Error with %d, skipping\n",orb.satno);
continue;
}
if (orb.rev<10.0)
continue;
// Loop over observations
for (i=0,nalt=0,nsel=0;i<d.n;i++) {
if (d.p[i].flag==2) {
alt=altitude(orb,d.p[i].mjd,d.p[i].s);
nsel++;
if (alt>altmin)
nalt++;
}
}
frac=(float) nalt/(float) nsel;
if (frac>0.95) {
if (tle->name) {
printf("%5d - %s: %d/%d %.4f\n", orb.satno, tle->name, nalt, nsel, frac);
} else {
printf("%5d: %d/%d %.4f\n", orb.satno, nalt, nsel, frac);
}
}
}
return satno;
}
void usage()
{
printf("rffit -d <data file> -c [tle catalog] -i [satno] -h\n\ndata file: Tabulated doppler curve\ntle catalog: Catalog with TLE's (optional)\nsatno: Satellite to load from TLE catalog (optional)\n\n");
printf("rffit: fit RF observations\n\n");
printf("-d <datafile> Input data file with RF measurements\n");
printf("-c <catalog> Catalog with TLE's [optional]\n");
printf("-i <satno> NORAD ID of satellite to load\n");
printf("-s <site> Site ID\n");
printf("-g GRAVES data\n");
printf("-m <offset> Frequency offset to apply [Hz]\n");
printf("-F <freqlist> List with frequencies [$ST_DATADIR/data/frequencies.txt]\n");
printf("-h This help\n");
return;
}
int main(int argc,char *argv[])
{
int i,j,flag,redraw=1,plot_curve=1,plot_type=1,residuals=0,elset=0;
int imode,year,style,color;
char xlabel[64],ylabel[32],text[64],freqlist[128];
int site_id=0;
float xmin,xmax,ymin,ymax;
float xminsel,xmaxsel,yminsel,ymaxsel;
float x0=0.0,y0=0.0,x=0.0,y=0.0;
double mjd,v,v1,azi,alt,rms=0.0,day,mjdtca=-1,altmin=0.0,mjdmid,mjdepoch=-1;
float t,f,vtca,foffset=0.0;
char c,nfdtca[32]="2014-01-01T00:00:00",nfd[32]="2014-01-01T00:00:00",nfdepoch[32]="2014-01-01T00:00:00";
int mode=0,posn=0,click=0;
char *catalog=NULL,*datafile=NULL,filename[64],string[64],bstar[10]=" 00000-0";
int arg=0,nobs=0;
FILE *fp,*std,*fpres;
char line0[72],line1[72],line2[72];
int ia[]={0,0,0,0,0,0,0};
float dx[]={0.1,0.1,0.35,0.35,0.6,0.6,0.85,0.85},dy[]={-0.05,-0.30,-0.05,-0.30,-0.05,-0.30,-0.05,-0.30};
int satno=-1,status;
site_t site,s0,s1;
int site_number[16],nsite=0,graves=0;
char *env;
tle_array_t *tle_array = NULL;
// Get site
env = getenv("ST_COSPAR");
if (env != NULL) {
site_id = atoi(env);
}
// Get frequency list
env=getenv("ST_DATADIR");
if(env==NULL||strlen(env)==0)
env=".";
sprintf(freqlist,"%s/data/frequencies.txt",env);
// Decode options
while ((arg=getopt(argc,argv,"d:c:i:hs:gm:F:"))!=-1) {
switch(arg) {
case 'd':
datafile=optarg;
break;
case 'c':
catalog=optarg;
break;
case 'i':
satno=atoi(optarg);
break;
case 'F':
strcpy(freqlist,optarg);
break;
case 'h':
usage();
return 0;
break;
case 'm':
foffset=atof(optarg)/1000.0;
break;
case 's':
site_id = atoi(optarg);
break;
case 'g':
graves=1;
break;
default:
usage();
return 0;
}
}
// Read data
d=read_data(datafile,graves,foffset);
d.fitfreq=1;
// Set graves frequency
if (graves==1) {
d.fitfreq=0;
d.ffit=143050.0;
}
// Count number of sites and assign colors
for (i=0;i<d.n;i++) {
// Check if site is assigned
for (j=0,flag=0;j<nsite;j++)
if (site_number[j] == d.p[i].site_id)
flag = 1;
// Not assigned
if (flag == 0) {
site_number[nsite]=d.p[i].site_id;
nsite++;
}
if (nsite>=16) {
printf("Too many observing sites.\n");
return 0;
}
}
if (site_id == 0) {
// No default site selected.
// Select first site from datafile
if (nsite > 0) {
site_id = site_number[0];
} else {
printf("No default site given and no site in datafile found, abort.");
}
}
// Set default observing site
site = get_site(site_id);
// Read TLE
tle_array = load_tles(catalog);
if (tle_array->number_of_elements == 0) {
fatal_error("File open failed for reading %s\n",catalog);
}
if (satno >= 0) {
tle_t * tle = get_tle_by_catalog_id(tle_array, satno);
if (tle == NULL) {
printf("No elements found for %5d\n", satno);
satno = -1;
} else {
orb = tle->orbit;
d.satname = tle->name;
}
}
if (freopen("/tmp/stderr.txt","w",stderr)==NULL)
fprintf(stderr,"Failed to redirect stderr\n");
cpgopen("/xs");
cpgask(0);
// Axis limits
xmin=d.mjdmin-0.1*d.dmjd-d.mjd0;
xmax=d.mjdmax+0.1*d.dmjd-d.mjd0;
if (graves==0) {
ymin=-12.0*d.f0/C;
ymax=12*d.f0/C;
} else if (graves==1) {
ymin=-20.0*d.f0/C;
ymax=20*d.f0/C;
}
mjd2nfd(d.mjd0,nfd);
sprintf(xlabel, "Date (UTC) - %s",nfd);
sprintf(ylabel,"Frequency - %.0f kHz",d.f0);
// For ever loop
for (;;) {
if (redraw==1) {
// Plot buttons
cpgpage();
cpgsvp(0.1,0.95,0.0,0.2);
cpgswin(0.0,1.0,-0.5,0.5);
// Buttons
cpgtext(0.12,-0.10,"Inclination");
cpgtext(0.37,-0.10,"Eccentricity");
cpgtext(0.62,-0.10,"Mean Anomaly");
cpgtext(0.87,-0.10,"B\\u*\\d");
cpgtext(0.12,-0.35,"Ascending Node");
cpgtext(0.37,-0.35,"Arg. of Perigee");
cpgtext(0.62,-0.35,"Mean Motion");
cpgtext(0.87,-0.35,"Frequency");
// Toggles
for (i=0;i<7;i++) {
cpgpt1(dx[i],dy[i],19);
if (ia[i]==1) {
cpgsci(2);
cpgpt1(dx[i],dy[i],16);
cpgsci(1);
}
}
cpgpt1(dx[7],dy[7],19);
if (d.fitfreq==1) {
cpgsci(2);
cpgpt1(dx[7],dy[7],16);
cpgsci(1);
}
// Sky plot
cpgsvp(0.715,0.95,0.5,0.99);
cpgwnad(-90.0,90.0,-90.0,90.0);
cpgbox("BC",0.,0,"BC",0.,0);
cpgsfs(2);
cpgcirc(0.0,0.0,90.0);
cpgpt1(0.0,0.0,2);
// Plot orbit
if (satno>0 && plot_curve==1) {
// Initialize
imode=init_sgdp4(&orb);
if (imode==SGDP4_ERROR) {
printf("Error with %d, skipping\n",orb.satno);
break;
}
cpgsci(15);
for (i=0;i<NMAX;i++) {
mjd=xmin+d.mjd0+(xmax-xmin)*(float) i/(float) (NMAX-1);
velocity(orb,mjd,site,&v,&azi,&alt);
// Get TCA
if (i>0) {
if (vtca*v<0.0 && alt>0 && mjd<d.mjdmax && mjd>d.mjdmin) {
mjdtca=mjd;
}
}
x=(90-alt)*sin(azi*D2R);
y=-(90-alt)*cos(azi*D2R);
if (i==0 || alt<0.0)
cpgmove(x,y);
else
cpgdraw(x,y);
vtca=v;
}
mjd2nfd(mjdtca,nfdtca);
cpgsci(1);
cpgsls(1);
// Plot points
for (i=0;i<d.n;i++) {
velocity(orb,d.p[i].mjd,site,&v,&azi,&alt);
x=(90-alt)*sin(azi*D2R);
y=-(90-alt)*cos(azi*D2R);
if (alt<0.0)
continue;
if (d.p[i].flag==1) {
cpgsci(1);
if (d.p[i].rsite_id==0)
cpgpt1(x,y,17);
else
cpgpt1(x,y,2);
} else if (d.p[i].flag==2) {
cpgsci(1);
if (d.p[i].rsite_id==0)
cpgpt1(x,y,17);
else
cpgpt1(x,y,2);
cpgsci(2);
cpgpt1(x,y,4);
}
}
cpgsci(1);
}
// Diagnostics
cpgsvp(0.715,0.95,0.2,0.55);
cpgwnad(0.0,1.0,0.0,1.0);
sprintf(text,"Measurements: %d",nobs);
cpgtext(0.0,1.0,text);
sprintf(text,"Frequency: %.3f MHz",d.ffit/1000.0);
cpgtext(0.0,0.85,text);
// Print/plot TCA
if (mjdtca>0) {
sprintf(text,"rms: %.3f kHz",rms);
cpgtext(0.0,0.7,text);
sprintf(text,"T\\dCA\\u: %s",nfdtca);
cpgtext(0.0,0.55,text);
}
// Print TLE epoch
if (satno>0) {
mjdepoch=doy2mjd(orb.ep_year,orb.ep_day);
mjd2nfd(mjdepoch,nfdepoch);
sprintf(text,"T\\dEP\\u: %s",nfdepoch);
cpgtext(0.0,0.425,text);
}
sprintf(text,"%s (%04d)",site.observer,site.id);
cpgtext(0.0,0.3,text);
// Plot site numbers
for (j=0;j<nsite;j++) {
sprintf(text,"%04d",site_number[j]);
cpgsci(j+2);
if (j<5)
cpgtext(0.25*j,0.15,text);
else
cpgtext(0.25*(j-5),0.05,text);
}
cpgsci(1);
// Initialize
cpgsvp(0.1,0.65,0.2,0.9);
cpgswin(xmin,xmax,ymin/d.f0*C,ymax/d.f0*C);
cpgbox("",0.,0,"CTSM",0.,0);
cpgmtxt("R",2.5,0.5,0.5,"Velocity (km/s)");
cpgswin(xmin,xmax,ymin,ymax);
cpgbox("BCTSN",0.,0,"BTSN",0.,0);
// cpgenv(xmin,xmax,ymin,ymax,0,0);
cpglab(xlabel,ylabel,"");
// Plot TCA
if (satno>0) {
cpgsci(2);
cpgsls(2);
cpgmove(mjdtca-d.mjd0,ymin);
cpgdraw(mjdtca-d.mjd0,ymax);
cpgtext(mjdtca-d.mjd0,ymin+0.95*(ymax-ymin)," T\\dCA\\u");
cpgsci(1);
cpgsls(1);
}
// Plot Epoch
if (satno>0) {
cpgsci(1);
cpgsls(4);
cpgmove(mjdepoch-d.mjd0,ymin);
cpgdraw(mjdepoch-d.mjd0,ymax);
cpgtext(mjdepoch-d.mjd0,ymin+0.05*(ymax-ymin)," T\\dEP\\u");
cpgsci(1);
cpgsls(1);
}
// Plot orbit
if (satno>0 && plot_curve==1 && residuals==0) {
// Plot tle
if (d.satname != NULL) {
cpgmtxt("T", 3.0, 0.0, 0.0, d.satname);
}
format_tle(orb,line1,line2);
cpgmtxt("T",2.0,0.0,0.0,line1);
cpgmtxt("T",1.0,0.0,0.0,line2);
// Initialize
imode=init_sgdp4(&orb);
if (imode==SGDP4_ERROR) {
printf("Error with %d, skipping\n",orb.satno);
break;
}
// Loop over sites for plotting model
for (j=0;j<nsite;j++) {
s0 = get_site(site_number[j]);
if (d.p[0].rsite_id != 0) {
s1 = get_site(d.p[0].rsite_id);
}
color=j+2;
for (i=0;i<NMAX;i++) {
mjd=xmin+d.mjd0+(xmax-xmin)*(float) i/(float) (NMAX-1);
t=(float) (mjd-d.mjd0);
if (d.p[0].rsite_id != 0) {
velocity(orb,mjd,s1,&v1,&azi,&alt);
velocity(orb,mjd,s0,&v,&azi,&alt);
f=(float) ((1.0-v/C)*(1.0-v1/C)*d.ffit-d.f0);
} else {
velocity(orb,mjd,s0,&v,&azi,&alt);
f=(float) ((1.0-v/C)*d.ffit-d.f0);
}
if (alt>0.0) {
cpgsls(1);
cpgsci(color);
} else {
cpgsls(2);
cpgsci(14);
}
if (i==0)
cpgmove(t,f);
else
cpgdraw(t,f);
}
cpgsci(1);
cpgsls(1);
}
}
// Plot selected points
for (i=0;i<d.n;i++) {
for (j=0;j<nsite;j++)
if (d.p[i].site_id==site_number[j])
break;
color=j+2;
style=17;
x=d.p[i].t;
y=d.p[i].f;
if (d.p[i].flag==1) {
cpgsci(color);
if (d.p[i].rsite_id==0)
cpgpt1(x,y,style);
else
cpgpt1(x,y,2);
} else if (d.p[i].flag==2) {
cpgsci(color);
if (d.p[i].rsite_id==0)
cpgpt1(x,y,style);
else
cpgpt1(x,y,2);
cpgsci(1);
cpgpt1(x,y,4);
}
}
cpgsci(1);
redraw=0;
}
// Get cursor
cpgband(mode,posn,x0,y0,&x,&y,&c);
// Quit
if (c=='q' || c=='Q')
break;
// Toggle curve
if (c=='p') {
plot_curve=(plot_curve==1) ? 0 : 1;
redraw=1;
}
// Mirror curve
if (c=='M') {
// Loop over points
for (i=0;i<d.n;i++) {
d.p[i].f=-d.p[i].f;
d.p[i].freq=d.f0-(d.p[i].freq-d.f0);
}
redraw=1;
}
// Toggles
if (isdigit(c) && c-'0'>=1 && c-'0'<8) {
if (ia[c-49]==0)
ia[c-49]=1;
else if (ia[c-49]==1)
ia[c-49]=0;
redraw=1;
} else if (isdigit(c) && c-'0'==8) {
if (d.fitfreq==0)
d.fitfreq=1;
else
d.fitfreq=0;
redraw=1;
}
// Select points by station
if (c=='C') {
printf("Provide station ID for data point selection:\n");
status=scanf("%d",&j);
for (i=0;i<d.n;i++)
if (d.p[i].site_id==j)
d.p[i].flag=2;
redraw=1;
}
// Change
if (c=='c') {
printf("( 1) Inclination, ( 2) Ascending Node, ( 3) Eccentricity,\n( 4) Arg. of Perigee, ( 5) Mean Anomaly, ( 6) Mean Motion,\n( 7) B* drag, ( 8) Epoch, ( 9) Satellite ID\n(10) Satellite name (11) Satellite COSPAR (12) Frequency (MHz)\n\nWhich parameter to change: ");
status=scanf("%i",&i);
if (i>=0 && i<=12) {
printf("\nNew value: ");
if (fgets(string,64,stdin)==NULL)
fprintf(stderr,"Failed to read string\n");
status=scanf("%s",string);
if (i==1) orb.eqinc=RAD(atof(string));
if (i==2) orb.ascn=RAD(atof(string));
if (i==3) orb.ecc=atof(string);
if (i==4) orb.argp=RAD(atof(string));
if (i==5) orb.mnan=RAD(atof(string));
if (i==6) orb.rev=atof(string);
if (i==7) orb.bstar=atof(string);
if (i==8)
orb.ep_day=mjd2doy(nfd2mjd(string),&orb.ep_year);
if (i==9) orb.satno=atoi(string);
if (i==10)
d.satname=string;
if (i==11)
strcpy(orb.desig,string);
if (i==12) {
d.ffit=atof(string) * 1000;
d.fitfreq=0;
}
redraw=1;
}
printf("\n================================================================================\n");
}
// Move
if (c=='m') {
printf("Provide frequency offset (kHz): ");
status=scanf("%lf",&v);
// Loop over points
for (i=0;i<d.n;i++) {
if (d.p[i].flag==2) {
d.p[i].f+=v;
d.p[i].freq+=v;
}
}
click=0;
redraw=1;
printf("\n================================================================================\n");
continue;
}
// Flux limit
if (c=='l') {
fp=fopen(freqlist,"a");
fprintf(fp,"%05d %lf\n",orb.satno,d.ffit/1000.0);
fclose(fp);
printf("Logged %05d at %lf to %s\n",orb.satno,d.ffit/1000.0,freqlist);
printf("\n================================================================================\n");
}
// Fit
if (c=='f') {
// Count points
for (i=0,nobs=0;i<d.n;i++)
if (d.p[i].flag==2)
nobs++;
if (satno<0) {
printf("No elements loaded!\n");
} else if (nobs==0) {
printf("No points selected!\n");
} else {
rms=fit_curve(orb,ia);
printf("%05d %.6f %.3f %s %04d %02d%010.6f %d\n",orb.satno,d.ffit/1000.0,rms,nfdtca,site_id,orb.ep_year-2000,orb.ep_day,nobs);
redraw=1;
}
}
// Set TLE epoch to current TCA
if (c=='e') {
orb.ep_day=mjd2doy(mjdtca,&orb.ep_year);
redraw=1;
}
// Get TLE
if (c=='g') {
printf("Get TLE from catalog, provide satellite number: ");
status=scanf("%d",&satno);
// Free previous TLE
if (tle_array != NULL) {
free_tles(tle_array);
}
// Read TLE
tle_array = load_tles(catalog);
if (tle_array->number_of_elements == 0) {
fatal_error("File open failed for reading %s\n",catalog);
}
tle_t * tle = get_tle_by_catalog_id(tle_array, satno);
if (tle == NULL) {
printf("No elements found for %5d\n", satno);
satno = -1;
} else {
orb = tle->orbit;
d.satname = tle->name;
print_orb(&orb);
d.ffit = d.f0;
redraw = 1;
}
printf("\n================================================================================\n");
}
// Identify
if (c=='i') {
if (graves==0) {
printf("rms limit (kHz): ");
status=scanf("%lf",&rms);
} else {
printf("Using 0.1 kHz rms limit\n");
rms=0.1;
}
if (catalog!=NULL) {
satno=identify_satellite_from_doppler(tle_array, rms);
if (satno>0) {
rms=fit_curve(orb,ia);
redraw=1;
plot_curve=1;
}
} else {
printf("No TLE catalog loaded\n");
}
printf("\n================================================================================\n");
}
// Identify
if (c=='I') {
printf("Above altitude (deg): ");
status=scanf("%lf",&altmin);
satno=identify_satellite_from_visibility(tle_array, altmin);
printf("\n================================================================================\n");
}
// Parameter search
// if (c=='S') {
// search();
// redraw=1;
// }
// Write TLE
if (c=='w') {
printf("TLE filename to write: ");
status=scanf("%s",filename);
print_tle(orb,filename,d.satname);
printf("\n================================================================================\n");
}
// Reread tle
if (c=='R') {
// Free previous TLE
if (tle_array != NULL) {
free_tles(tle_array);
}
// Reread TLE
tle_array = load_tles(catalog);
if (tle_array->number_of_elements == 0) {
fatal_error("File open failed for reading %s\n", catalog);
}
tle_t * tle = get_tle_by_catalog_id(tle_array, satno);
if (tle == NULL) {
printf("No elements found for %5d\n", satno);
satno = -1;
} else {
orb = tle->orbit;
d.satname = tle->name;
print_orb(&orb);
d.ffit = d.f0;
redraw = 1;
}
printf("\n================================================================================\n");
}
// Diagonal select
if (c=='k') {
printf("Selecting diagonal\n");
diagonal_select(xmin,ymin,xmax,ymax,2);
redraw=1;
}
// Toggle residuals
if (c=='j') {
fpres=fopen("residuals.dat","w");
for (i=0;i<d.n;i++)
fprintf(fpres,"%14.8lf %lf %lf %d\n",d.p[i].mjd,d.p[i].freq,d.p[i].res,d.p[i].site_id);
fclose(fpres);
if (residuals==0)
residuals=1;
else if (residuals==1)
residuals=0;
redraw=1;
}
// Delete
if (c=='X') {
if (click==0) {
deselect_nearest(x,y,xmin,ymin,xmax,ymax);
click=0;
redraw=1;
}
}
// Zoom
if (c=='z') {
click=1;
mode=2;
}
// Delete box
if (c=='d') {
click=2;
mode=2;
}
// Execute zoom, or box delete
if (c=='A') {
if (click==0) {
click=1;
} else if (click==1 && mode==2) {
xmin=(x0<x) ? x0 : x;
xmax=(x0>x) ? x0 : x;
ymin=(y0<y) ? y0 : y;
ymax=(y0>y) ? y0 : y;
click=0;
mode=0;
redraw=1;
} else if (click==2 && mode==2) {
xminsel=(x0<x) ? x0 : x;
xmaxsel=(x0>x) ? x0 : x;
yminsel=(y0<y) ? y0 : y;
ymaxsel=(y0>y) ? y0 : y;
deselect_inside(xminsel,yminsel,xmaxsel,ymaxsel);
click=0;
mode=0;
redraw=1;