MRTKLIB Astronomy Module — Sun and moon position computation. More...

#include "mrtklib/mrtk_time.h"

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Functions
void	sunmoonpos_eci (gtime_t tut, double rsun, double rmoon)
	Compute sun and moon position in ECI.
void	sunmoonpos (gtime_t tutc, const double erpv, double rsun, double rmoon, double gmst)
	Compute sun and moon position in ECEF.

Detailed Description

MRTKLIB Astronomy Module — Sun and moon position computation.

This header provides functions for computing the positions of the Sun and Moon in ECI and ECEF coordinate frames, extracted from rtkcmn.c with zero algorithmic changes.

Note: Functions declared here are implemented in mrtk_astro.c.

Definition in file mrtk_astro.h.

Function Documentation

◆ sunmoonpos()

void sunmoonpos	(	gtime_t	tutc,
		const double *	erpv,
		double *	rsun,
		double *	rmoon,
		double *	gmst )

Compute sun and moon position in ECEF.

Parameters

[in]	tutc	Time in UTC (GPST)
[in]	erpv	ERP value {xp,yp,ut1_utc,lod} (rad,rad,s,s/d)
[out]	rsun	Sun position in ECEF (m) (NULL: not output)
[out]	rmoon	Moon position in ECEF (m) (NULL: not output)
[out]	gmst	GMST (rad) (NULL: not output)

Definition at line 135 of file mrtk_astro.c.

References eci2ecef(), matmul(), sunmoonpos_eci(), time_str(), timeadd(), and trace().

Referenced by satantoff(), tidedisp(), and windupcorr().

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◆ sunmoonpos_eci()

void sunmoonpos_eci	(	gtime_t	tut,
		double *	rsun,
		double *	rmoon )

Compute sun and moon position in ECI.

Parameters

[in]	tut	Time in UT1 (GPST)
[out]	rsun	Sun position in ECI (m) (NULL: not output)
[out]	rmoon	Moon position in ECI (m) (NULL: not output)

Note: See reference [4] 5.1.1, 5.2.1

Definition at line 78 of file mrtk_astro.c.

References ast_args(), AU, D2R, epoch2time(), RE_WGS84, time_str(), timediff(), and trace().

Referenced by sunmoonpos().