fsfw/contrib/fsfw_contrib/sgp4/sgp4unit.h

118 lines
3.7 KiB
C
Raw Permalink Normal View History

2020-09-18 13:15:14 +02:00
#ifndef _sgp4unit_
#define _sgp4unit_
/* ----------------------------------------------------------------
*
* sgp4unit.h
*
* this file contains the sgp4 procedures for analytical propagation
* of a satellite. the code was originally released in the 1980 and 1986
* spacetrack papers. a detailed discussion of the theory and history
* may be found in the 2006 aiaa paper by vallado, crawford, hujsak,
* and kelso.
*
* companion code for
* fundamentals of astrodynamics and applications
* 2007
* by david vallado
*
* (w) 719-573-2600, email dvallado@agi.com
*
* current :
* 20 apr 07 david vallado
* misc fixes for constants
* changes :
* 11 aug 06 david vallado
* chg lyddane choice back to strn3, constants, misc doc
* 15 dec 05 david vallado
* misc fixes
* 26 jul 05 david vallado
* fixes for paper
* note that each fix is preceded by a
* comment with "sgp4fix" and an explanation of
* what was changed
* 10 aug 04 david vallado
* 2nd printing baseline working
* 14 may 01 david vallado
* 2nd edition baseline
* 80 norad
* original baseline
* ---------------------------------------------------------------- */
#include <math.h>
#include <stdio.h>
// -------------------------- structure declarations ----------------------------
typedef enum
{
wgs72old,
wgs72,
wgs84
} gravconsttype;
typedef struct elsetrec
{
long int satnum;
int epochyr, epochtynumrev;
int error;
char init, method;
/* Near Earth */
int isimp;
double aycof , con41 , cc1 , cc4 , cc5 , d2 , d3 , d4 ,
delmo , eta , argpdot, omgcof , sinmao , t , t2cof, t3cof ,
t4cof , t5cof , x1mth2 , x7thm1 , mdot , nodedot, xlcof , xmcof ,
nodecf;
/* Deep Space */
int irez;
double d2201 , d2211 , d3210 , d3222 , d4410 , d4422 , d5220 , d5232 ,
d5421 , d5433 , dedt , del1 , del2 , del3 , didt , dmdt ,
dnodt , domdt , e3 , ee2 , peo , pgho , pho , pinco ,
plo , se2 , se3 , sgh2 , sgh3 , sgh4 , sh2 , sh3 ,
si2 , si3 , sl2 , sl3 , sl4 , gsto , xfact , xgh2 ,
xgh3 , xgh4 , xh2 , xh3 , xi2 , xi3 , xl2 , xl3 ,
xl4 , xlamo , zmol , zmos , atime , xli , xni;
double a , altp , alta , epochdays, jdsatepoch , nddot , ndot ,
bstar , rcse , inclo , nodeo , ecco , argpo , mo ,
no;
} elsetrec;
// --------------------------- function declarations ----------------------------
int sgp4init
(
gravconsttype whichconst, const int satn, const double epoch,
const double xbstar, const double xecco, const double xargpo,
const double xinclo, const double xmo, const double xno,
const double xnodeo,
elsetrec& satrec
);
int sgp4
(
gravconsttype whichconst,
elsetrec& satrec, double tsince,
double r[], double v[]
);
double gstime
(
double
);
void getgravconst
(
gravconsttype,
double&,
double&,
double&,
double&,
double&,
double&,
double&,
double&
);
#endif