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sattools/tleinfo.c

386 lines
8.9 KiB
C
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <getopt.h>
#include "sgdp4h.h"
#include "satutl.h"
#define LIM 128
#define XKMPER 6378.135 /* Km per earth radii */
#define XMNPDA 1440.0 /* Minutes per day */
#define AE 1.0 /* Earth radius in "chosen units". */
#define XKE 0.743669161e-1
#define CK2 5.413080e-4 /* (0.5 * XJ2 * AE * AE) */
#define D2R M_PI/180.0
#define R2D 180.0/M_PI
extern double SGDP4_jd0;
void usage(void)
{
printf("usage: tleinfo [-c TLEFILE] [-u] [|-1|-f] [ |-n|-d] [-i SATNO] [-I INTLDESG ] [ |-a|-b] [-H] [-h]\n\n");
printf("-c TLEFILE The file containing orbital elements in the form of TLEs, 3 lines per object\n");
printf(" default: ./bulk.tle\n");
printf("-i SATNO Filter only elements for objects with this NORAD catalog identifier\n");
printf("-I INTLDESG Filter only elements for objects with this international designator\n");
printf("-u Show only one object (MODE0 only)\n");
printf("\nSelect MODE:\n");
printf(" MODE0: Show TLEs, object names or COSPAR designations\n");
printf("-1 MODE1: Show list of elements (one line per object)\n");
printf("-f MODE2: Show human-readable parameters\n\n");
printf("Select INFOTYPE\n");
printf("MODE0:\n");
printf(" default Show the TLEs itself\n");
printf(" -n Show only the name of the objects\n");
printf(" -d Show only the COSPAR designation of the objects\n\n");
printf("MODE1:\n");
printf(" default SATNO, YEAR, DOY, INCL, ASCN, ARGP, MA, ECC, MM, BSTAR\n");
printf(" -a SATNO, SEMI, PERIGEE, APOGEE, INCL, PERIOD, ECC\n");
printf(" -b SATNO, YEAR, DOY, INCL, ASCN, ARGP, MA, ECC, MM, floor(MJD), LNG_AT_MIDNIGHT\n\n");
printf("-H Show header (MODE1 only), default: disabled\n");
printf("-h Print usage\n");
}
double modulo(double x,double y);
// 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;
}
// DOY to MJD
double doy2mjd(int year,double doy)
{
int month,k=2;
double day;
if (year%4==0 && year%400!=0)
k=1;
month=floor(9.0*(k+doy)/275.0+0.98);
if (doy<32)
month=1;
day=doy-floor(275.0*month/9.0)+k*floor((month+9.0)/12.0)+30.0;
return date2mjd(year,month,day);
}
// 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;
}
void orbit(orbit_t orb,float *aodp,float *perigee,float *apogee,float *period)
{
float xno,eo,xincl;
float a1,betao2,betao,temp0,del1,a0,del0,xnodp;
xno=orb.rev*2.0*M_PI/XMNPDA;
eo=orb.ecc;
xincl=orb.eqinc;
a1 = pow(XKE / xno, 2.0/3.0);
betao2 = 1.0 - eo * eo;
betao = sqrt(betao2);
temp0 = (1.5 * CK2) * cos(xincl)*cos(xincl) / (betao * betao2);
del1 = temp0 / (a1 * a1);
a0 = a1 * (1.0 - del1 * (1.0/3.0 + del1 * (1.0 + del1 * 134.0/81.0)));
del0 = temp0 / (a0 * a0);
xnodp = xno / (1.0 + del0);
*aodp = (a0 / (1.0 - del0));
*perigee = (*aodp * (1.0 - eo) - 1) * XKMPER;
*apogee = (*aodp * (1.0 + eo) - 1) * XKMPER;
*period = (TWOPI * 1440.0 / XMNPDA) / xnodp;
*aodp=(*aodp-1)*XKMPER;
return;
}
// Compute Date from Julian Day
void mjd2nfd(double mjd,char *nfd)
{
double f,jd,dday;
int z,alpha,a,b,c,d,e;
int year,month,day,hour,min;
float sec,x;
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;
sec=floor(1000.0*sec)/1000.0;
sprintf(nfd,"%04d-%02d-%02dT%02d:%02d:%06.3f",year,month,day,hour,min,sec);
return;
}
float orbital_longitude_at_midnight(orbit_t orb,double mjd0)
{
int rv,imode;
double jd,tsince,mjd;
kep_t K;
imode=init_sgdp4(&orb);
mjd=floor(mjd0);
jd=mjd+2400000.5;
tsince=1440.0*(jd-SGDP4_jd0);
rv=sgdp4(tsince,1,&K);
return modulo(K.theta*R2D,360.0);
}
int main(int argc,char *argv[])
{
int arg=0,satno=0,header=0,oneline=0,no,name=0,desig=0,has_intldesg=0;
char tlefile[LIM];
char line0[LIM],line1[LIM],line2[LIM],nfd[32],intldesg[16]="",desg[16]="";
FILE *file;
orbit_t orb;
float aodp,perigee,apogee,period,lng;
int info=0,unique=0;
double mjd;
char *env;
env=getenv("ST_TLEDIR");
sprintf(tlefile,"%s/bulk.tle",env);
// Decode options
while ((arg=getopt(argc,argv,"c:i:I:aH1ftndbu"))!=-1) {
switch (arg) {
case 'c':
strcpy(tlefile,optarg);
break;
case 'u':
unique=1;
break;
case '1':
oneline=1;
break;
case 'f':
oneline=2;
break;
case 'n':
name=1;
break;
case 'd':
desig=1;
break;
case 'i':
satno=atoi(optarg);
break;
case 'I':
strcpy(intldesg,optarg);
has_intldesg=1;
break;
case 'a':
info=1;
break;
case 'b':
info=2;
break;
case 'H':
header=1;
break;
case 'h':
usage();
return 0;
break;
default:
usage();
return 0;
}
}
if (oneline==0) {
// Open file
file=fopen(tlefile,"rb");
if (file==NULL)
fatal_error("File open failed for reading \"%s\"",tlefile);
while (fgetline(file,line1,LIM)>0) {
// Find TLE line
if (line1[0]=='1') {
fgetline(file,line2,LIM);
sscanf(line1+2,"%d",&no);
sscanf(line1+9,"%s",&desg);
if ((satno==0 || satno==no) && (has_intldesg==0)) {
if (name==1 && desig==0)
printf("%s\n",line0);
else if (name==0 && desig==1)
printf("%.8s\n",line1+9);
else
printf("%s\n%s\n%s\n",line0,line1,line2);
if (unique==1)
break;
} else if (has_intldesg==1) {
if (strcmp(desg,intldesg)==0) {
printf("%s\n%s\n%s\n",line0,line1,line2);
}
}
}
strcpy(line0,line1);
}
/*
// Loop over file
while (fgetline(file,line0,LIM)>0) {
// Read data lines
if (line0[0]!='1' || line0[0]!='2') {
fgetline(file,line1,LIM);
fgetline(file,line2,LIM);
sscanf(line1+2,"%d",&no);
if (satno==0 || satno==no) {
if (name==1 && desig==0)
printf("%s\n",line0);
else if (name==0 && desig==1)
printf("%.8s\n",line1+9);
else
printf("%s\n%s\n%s\n",line0,line1,line2);
}
} else if (line0[0]=='1') {
fgetline(file,line2,LIM);
sscanf(line1+2,"%d",&no);
if (satno==0 || satno==no)
printf("%s\n%s\n",line0,line2);
}
}
*/
fclose(file);
} else if (oneline==1) {
// Open file
file=fopen(tlefile,"rb");
if (file==NULL)
fatal_error("File open failed for reading \"%s\"",tlefile);
if (header==1) {
if (info==0)
printf("SATNO YEAR DOY INCL ASCN ARGP MA ECC MM BSTAR\n");
else if (info==1)
printf("SATNO SEMI PERIGEE APOGEE PERIOD ECC\n");
else if (info==2)
printf("SATNO YEAR DOY INCL ASCN ARGP MA ECC MM floor(MJD) LNG_AT_MIDNIGHT\n");
}
// Loop over file
while (read_twoline(file,satno,&orb)==0) {
orbit(orb,&aodp,&perigee,&apogee,&period);
mjd=doy2mjd(orb.ep_year,orb.ep_day);
mjd2nfd(mjd,nfd);
if (info==0) printf("%05d %10.4lf %8.4f %8.4f %8.4f %8.4f %8.6f %8.5f %e\n",orb.satno,mjd,DEG(orb.eqinc),DEG(orb.ascn),DEG(orb.argp),DEG(orb.mnan),orb.ecc,orb.rev,orb.bstar);
if (info==1) printf("%05d %6.0f x %6.0f x %6.2f %8.2f %8.6f %14.8lf\n",orb.satno,perigee,apogee,DEG(orb.eqinc),period,orb.ecc,mjd);
if (info==2) {
lng=orbital_longitude_at_midnight(orb,mjd);
printf("%05d %10.4lf %8.4f %8.4f %8.4f %8.4f %8.6f %8.5f %10.4lf %8.4f\n",orb.satno,mjd,DEG(orb.eqinc),DEG(orb.ascn),DEG(orb.argp),DEG(orb.mnan),orb.ecc,orb.rev,floor(mjd),lng);
}
}
fclose(file);
} else if (oneline==2) {
// Open file
file=fopen(tlefile,"rb");
if (file==NULL)
fatal_error("File open failed for reading \"%s\"",tlefile);
// Loop over file
while (read_twoline(file,satno,&orb)==0)
print_orb(&orb);
fclose(file);
}
return 0;
}
// Return x modulo y [0,y)
double modulo(double x,double y)
{
x=fmod(x,y);
if (x<0.0) x+=y;
return x;
}
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