int main(void)
{ int jbeg, jend, j, d, m, y;
jbeg = jday(1, 1, 1);
jend = jday(31, 12, 4000);
for (j = jbeg; j <= jend; j++)
{ xassert(jdate(j, &d, &m, &y) == 0);
xassert(jday(d, m, y) == j);
}
xprintf("Routines jday and jdate work correctly.\n");
return 0;
}
/*------------------------------------------------------------------------*/
void fill_one_event (EVENT *ev, char *buff )
/*------------------------------------------------------------------------*/
{
sscanf(&(buff[0]),"%4d", &(ev->yy) );
sscanf(&(buff[5]),"%2d", &(ev->mm) );
sscanf(&(buff[8]),"%2d", &(ev->dd) );
//sscanf(&(buff[11]),"%2d", &(ev->h) );
//sscanf(&(buff[13]),"%2d", &(ev->m) );
//sscanf(&(buff[15]),"%2d", &(ev->s) );
// sscanf(&(buff[20]),"%2d", &(ev->ms) );
//ev->ms = 10.*ev->ms;
ev->h = 0;
ev->m = 0;
ev->ms = 0;
printf("ev->yy %d, ev->mm %d,ev->dd %d, ev->h %d, ev->m %d, ev->s %d, ev->ms %d\n",
ev->yy, ev->mm, ev->dd, ev->h, ev->m, ev->s, ev->ms);
ev->jday = jday( ev->yy, ev->mm, ev->dd );
ev->t0 = abs_time (ev->yy, ev->jday, ev->h, ev->m, ev->s, ev->ms );
sprintf(ev->name,"%d_%d_%d_%d_%d_%d",ev->yy, ev->mm, ev->dd, ev->h, ev->m, ev->s );
printf(" ev->t0 %f\n",ev->t0);
system(str);
}
void twoline2rv
(
char longstr1[130], char longstr2[130],
char typerun, char typeinput, char opsmode,
gravconsttype whichconst,
double& startmfe, double& stopmfe, double& deltamin,
sgp4struct &satrec
)
{
const double deg2rad = pi / 180.0; // 0.0174532925199433
const double xpdotp = 1440.0 / (2.0 * pi); // 229.1831180523293
double sec, mu, radiusearthkm, tumin, xke, j2, j3, j4, j3oj2;
double startsec, stopsec, startdayofyr, stopdayofyr, jdstart, jdstop;
int startyear, stopyear, startmon, stopmon, startday, stopday,
starthr, stophr, startmin, stopmin;
int cardnumb, numb, j;
long revnum = 0, elnum = 0;
char classification, intldesg[11];
int year = 0;
int mon, day, hr, minute, nexp, ibexp;
getgravconst( whichconst, tumin, mu, radiusearthkm, xke, j2, j3, j4, j3oj2 );
satrec.error = 0;
// set the implied decimal points since doing a formated read
// fixes for bad input data values (missing, ...)
for (j = 10; j <= 15; j++)
if (longstr1[j] == ' ')
longstr1[j] = '_';
if (longstr1[44] != ' ')
longstr1[43] = longstr1[44];
longstr1[44] = '.';
if (longstr1[7] == ' ')
longstr1[7] = 'U';
if (longstr1[9] == ' ')
longstr1[9] = '.';
for (j = 45; j <= 49; j++)
if (longstr1[j] == ' ')
longstr1[j] = '0';
if (longstr1[51] == ' ')
longstr1[51] = '0';
if (longstr1[53] != ' ')
longstr1[52] = longstr1[53];
longstr1[53] = '.';
longstr2[25] = '.';
for (j = 26; j <= 32; j++)
if (longstr2[j] == ' ')
longstr2[j] = '0';
if (longstr1[62] == ' ')
longstr1[62] = '0';
if (longstr1[68] == ' ')
longstr1[68] = '0';
sscanf(longstr1,"%2d %5ld %1c %10s %2d %12lf %11lf %7lf %2d %7lf %2d %2d %6ld ",
&cardnumb,&satrec.noradNum,&classification, intldesg, &satrec.epochyr,
&satrec.epochdays,&satrec.ndot, &satrec.nddot, &nexp, &satrec.bstar,
&ibexp, &numb, &elnum );
if (typerun == 'v') // run for specified times from the file
{
if (longstr2[52] == ' ')
sscanf(longstr2,"%2d %5ld %9lf %9lf %8lf %9lf %9lf %10lf %6ld %lf %lf %lf \n",
&cardnumb,&satrec.noradNum, &satrec.inclination,
&satrec.rightAscNode,&satrec.eccentricity, &satrec.argpo, &satrec.meanAnomaly, &satrec.meanMotion,
&revnum, &startmfe, &stopmfe, &deltamin );
else
sscanf(longstr2,"%2d %5ld %9lf %9lf %8lf %9lf %9lf %11lf %6ld %lf %lf %lf \n",
&cardnumb,&satrec.noradNum, &satrec.inclination,
&satrec.rightAscNode,&satrec.eccentricity, &satrec.argpo, &satrec.meanAnomaly, &satrec.meanMotion,
&revnum, &startmfe, &stopmfe, &deltamin );
}
else // simply run -1 day to +1 day or user input times
{
if (longstr2[52] == ' ')
sscanf(longstr2,"%2d %5ld %9lf %9lf %8lf %9lf %9lf %10lf %6ld \n",
&cardnumb,&satrec.noradNum, &satrec.inclination,
&satrec.rightAscNode,&satrec.eccentricity, &satrec.argpo, &satrec.meanAnomaly, &satrec.meanMotion,
&revnum );
else
sscanf(longstr2,"%2d %5ld %9lf %9lf %8lf %9lf %9lf %11lf %6ld \n",
&cardnumb,&satrec.noradNum, &satrec.inclination,
&satrec.rightAscNode,&satrec.eccentricity, &satrec.argpo, &satrec.meanAnomaly, &satrec.meanMotion,
&revnum );
}
// ---- find no, ndot, nddot ----
satrec.meanMotionRad = satrec.meanMotion / xpdotp; //* rad/min
satrec.nddot= satrec.nddot * pow(10.0, nexp);
satrec.bstar= satrec.bstar * pow(10.0, ibexp);
// ---- convert to sgp4 units ----
satrec.a = pow( satrec.meanMotionRad*tumin , (-2.0/3.0) );
satrec.ndot = satrec.ndot / (xpdotp*1440.0); //* ? * minperday
satrec.nddot= satrec.nddot / (xpdotp*1440.0*1440);
// ---- find standard orbital elements ----
satrec.inclination = satrec.inclination * deg2rad;
satrec.rightAscNode = satrec.rightAscNode * deg2rad;
satrec.argpo = satrec.argpo * deg2rad;
satrec.meanAnomaly = satrec.meanAnomaly * deg2rad;
satrec.alta = satrec.a*(1.0 + satrec.eccentricity) - 1.0;
satrec.altp = satrec.a*(1.0 - satrec.eccentricity) - 1.0;
// ----------------------------------------------------------------
// find sgp4epoch time of element set
// remember that sgp4 uses units of days from 0 jan 1950 (sgp4epoch)
// and minutes from the epoch (time)
// ----------------------------------------------------------------
// ---------------- temp fix for years from 1957-2056 -------------------
// --------- correct fix will occur when year is 4-digit in tle ---------
if (satrec.epochyr < 57)
year= satrec.epochyr + 2000;
else
year= satrec.epochyr + 1900;
days2mdhms ( year,satrec.epochdays, mon,day,hr,minute,sec );
jday( year,mon,day,hr,minute,sec, satrec.jdsatepoch );
// ---- input start stop times manually
if ((typerun != 'v') && (typerun != 'c'))
{
// ------------- enter start/stop ymd hms values --------------------
if (typeinput == 'e')
{
printf("input start prop year mon day hr min sec \n");
// make sure there is no space at the end of the format specifiers in scanf!
scanf( "%i %i %i %i %i %lf",&startyear, &startmon, &startday, &starthr, &startmin, &startsec);
fflush(stdin);
jday( startyear,startmon,startday,starthr,startmin,startsec, jdstart );
printf("input stop prop year mon day hr min sec \n");
scanf( "%i %i %i %i %i %lf",&stopyear, &stopmon, &stopday, &stophr, &stopmin, &stopsec);
fflush(stdin);
jday( stopyear,stopmon,stopday,stophr,stopmin,stopsec, jdstop );
startmfe = (jdstart - satrec.jdsatepoch) * 1440.0;
stopmfe = (jdstop - satrec.jdsatepoch) * 1440.0;
printf("input time step in minutes \n");
scanf( "%lf",&deltamin );
}
// -------- enter start/stop year and days of year values -----------
if (typeinput == 'd')
{
printf("input start year dayofyr \n");
scanf( "%i %lf",&startyear, &startdayofyr );
printf("input stop year dayofyr \n");
scanf( "%i %lf",&stopyear, &stopdayofyr );
days2mdhms ( startyear,startdayofyr, mon,day,hr,minute,sec );
jday( startyear,mon,day,hr,minute,sec, jdstart );
days2mdhms ( stopyear,stopdayofyr, mon,day,hr,minute,sec );
jday( stopyear,mon,day,hr,minute,sec, jdstop );
startmfe = (jdstart - satrec.jdsatepoch) * 1440.0;
stopmfe = (jdstop - satrec.jdsatepoch) * 1440.0;
printf("input time step in minutes \n");
scanf( "%lf",&deltamin );
}
// ------------------ enter start/stop mfe values -------------------
if (typeinput == 'm')
{
printf("input start min from epoch \n");
scanf( "%lf",&startmfe );
printf("input stop min from epoch \n");
scanf( "%lf",&stopmfe );
printf("input time step in minutes \n");
scanf( "%lf",&deltamin );
}
}
// ------------ perform complete catalog evaluation, -+ 1 day -----------
if (typerun == 'c')
{
startmfe = -1440.0;
stopmfe = 1440.0;
deltamin = 10.0;
}
// ---------------- initialize the orbit at sgp4epoch -------------------
sgp4init( whichconst, opsmode, satrec.noradNum, satrec.jdsatepoch-2433281.5,
satrec.bstar, satrec.eccentricity, satrec.argpo, satrec.inclination,
satrec.meanAnomaly, satrec.meanMotionRad, satrec.rightAscNode, satrec);
} // end twoline2rv
/////////////////////////////////////////////////////////////////////////////
// Initialize()
// Initialize the string array.
void QTle::Initialize()
{
const double deg2rad = PI / 180.0; // 0.0174532925199433
const double xpdotp = 1440.0 / (2.0 * PI); // 229.1831180523293
int year, mon, day, hr, minute;
double sec;
assert(!m_strName.isEmpty());
assert(!m_strLine1.isEmpty());
assert(!m_strLine2.isEmpty());
m_Field[FLD_NORADNUM] = m_strLine1.mid(TLE1_COL_SATNUM, TLE1_LEN_SATNUM);
m_Field[FLD_INTLDESC] = m_strLine1.mid(TLE1_COL_INTLDESC_A,
TLE1_LEN_INTLDESC_A +
TLE1_LEN_INTLDESC_B +
TLE1_LEN_INTLDESC_C);
m_Field[FLD_EPOCHYEAR] =
m_strLine1.mid(TLE1_COL_EPOCH_A, TLE1_LEN_EPOCH_A);
m_Field[FLD_EPOCHDAY] =
m_strLine1.mid(TLE1_COL_EPOCH_B, TLE1_LEN_EPOCH_B);
if (m_strLine1[TLE1_COL_MEANMOTIONDT] == '-')
{
// value is negative
m_Field[FLD_MMOTIONDT] = "-0";
}
else
m_Field[FLD_MMOTIONDT] = "0";
m_Field[FLD_MMOTIONDT] += m_strLine1.mid(TLE1_COL_MEANMOTIONDT + 1,
TLE1_LEN_MEANMOTIONDT);
// decimal point assumed; exponential notation
m_Field[FLD_MMOTIONDT2] = ExpToDecimal(
m_strLine1.mid(TLE1_COL_MEANMOTIONDT2,
TLE1_LEN_MEANMOTIONDT2));
// decimal point assumed; exponential notation
m_Field[FLD_BSTAR] = ExpToDecimal(
m_strLine1.mid(TLE1_COL_BSTAR,
TLE1_LEN_BSTAR));
//TLE1_COL_EPHEMTYPE
//TLE1_LEN_EPHEMTYPE
m_Field[FLD_SET] = m_strLine1.mid(TLE1_COL_ELNUM, TLE1_LEN_ELNUM);
//TrimLeft(m_Field[FLD_SET].tr);
//TLE2_COL_SATNUM
//TLE2_LEN_SATNUM
m_Field[FLD_I] = m_strLine2.mid(TLE2_COL_INCLINATION,
TLE2_LEN_INCLINATION).trimmed();
m_Field[FLD_RAAN] = m_strLine2.mid(TLE2_COL_RAASCENDNODE,
TLE2_LEN_RAASCENDNODE).trimmed();
// decimal point is assumed
m_Field[FLD_E] = "0.";
m_Field[FLD_E] += m_strLine2.mid(TLE2_COL_ECCENTRICITY,
TLE2_LEN_ECCENTRICITY);
m_Field[FLD_ARGPER] = m_strLine2.mid(TLE2_COL_ARGPERIGEE,
TLE2_LEN_ARGPERIGEE).trimmed();
m_Field[FLD_M] = m_strLine2.mid(TLE2_COL_MEANANOMALY,
TLE2_LEN_MEANANOMALY).trimmed();
m_Field[FLD_MMOTION] = m_strLine2.mid(TLE2_COL_MEANMOTION,
TLE2_LEN_MEANMOTION).trimmed();
m_Field[FLD_ORBITNUM] = m_strLine2.mid(TLE2_COL_REVATEPOCH,
TLE2_LEN_REVATEPOCH).trimmed();
satnum = m_Field[FLD_NORADNUM].toLong();
epochyr = m_Field[FLD_EPOCHYEAR].toInt();
epochdays = m_Field[FLD_EPOCHDAY].toDouble();
ndot = m_Field[FLD_MMOTIONDT].toDouble(); // mean motion dt
nddot = m_Field[FLD_MMOTIONDT2].toDouble(); // mean motion dt2
bstar = m_Field[FLD_BSTAR].toDouble(); // bstar
inclo = m_Field[FLD_I].toDouble(); // inclination
nodeo = m_Field[FLD_RAAN].toDouble(); // right ascending node
ecco = m_Field[FLD_E].toDouble(); // eccenticity
argpo = m_Field[FLD_ARGPER].toDouble(); // argument of perigee
mo = m_Field[FLD_M].toDouble(); // mean anomaly
no = m_Field[FLD_MMOTION].toDouble(); // mean motion
getgravconst( whichconst, tumin, mu, radiusearthkm, xke, j2, j3, j4, j3oj2, radiusearthkmminor, flattening );
// ---- find no ----
no = no / xpdotp; //* rad/min
// ---- convert to sgp4 units ----
a = pow( no*tumin , (-2.0/3.0) );
ndot = ndot / (xpdotp*1440.0); //* ? * minperday
nddot= nddot / (xpdotp*1440.0*1440);
// ---- find standard orbital elements ----
inclo = inclo * deg2rad;
nodeo = nodeo * deg2rad;
argpo = argpo * deg2rad;
mo = mo * deg2rad;
alta = a*(1.0 + ecco) - 1.0;
altp = a*(1.0 - ecco) - 1.0;
// ----------------------------------------------------------------
// find sgp4epoch time of element set
// remember that sgp4 uses units of days from 0 jan 1950 (sgp4epoch)
// and minutes from the epoch (time)
// ----------------------------------------------------------------
// ---------------- temp fix for years from 1957-2056 -------------------
// --------- correct fix will occur when year is 4-digit in tle ---------
if (epochyr < 57)
year= epochyr + 2000;
else
year= epochyr + 1900;
days2mdhms ( year, epochdays, mon, day, hr, minute, sec );
jday( year, mon, day, hr, minute, sec, jdsatepoch );
const double a1 = pow( xke / no, 2/3);
const double cosio = cos(inclo);
const double theta2 = cosio * cosio;
const double x3thm1 = 3.0 * theta2 - 1.0;
const double eosq = ecco * ecco;
const double betao2 = 1.0 - eosq;
const double betao = sqrt(betao2);
const double temp = (1.5 * (j2/2)) * x3thm1 / (betao * betao2);
const double del1 = temp / (a1 * a1);
const double a0 = a1 * (1.0 - del1 * (1.0 / 3.0 + del1 * (1.0 + del1 * 134.0 / 81.0)));
const double del0 = temp / (a0 * a0);
recovered_mean_motion = no/(1.0 + del0);
} // InitStrVars()