mrtk_sbas.h File Reference

MRTKLIB SBAS Module — SBAS message decoding and corrections. More...

#include <stdint.h>
#include <stdio.h>
#include "mrtklib/mrtk_nav.h"
#include "mrtklib/mrtk_time.h"

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Functions
int	sbsreadmsg (const char *file, int sel, sbs_t *sbs)
	Read SBAS message file.
int	sbsreadmsgt (const char *file, int sel, gtime_t ts, gtime_t te, sbs_t *sbs)
	Read SBAS message file with time span.
void	sbsoutmsg (FILE *fp, sbsmsg_t *sbsmsg)
	Output SBAS message record.
int	sbsdecodemsg (gtime_t time, int prn, const uint32_t *words, sbsmsg_t *sbsmsg)
	Decode SBAS message frame words.
int	sbsupdatecorr (const sbsmsg_t *msg, nav_t *nav)
	Update SBAS corrections in navigation data.
int	sbssatcorr (gtime_t time, int sat, const nav_t *nav, double *rs, double *dts, double *var)
	SBAS satellite ephemeris and clock correction.
int	sbsioncorr (gtime_t time, const nav_t *nav, const double *pos, const double *azel, double *delay, double *var)
	SBAS ionospheric delay correction.
double	sbstropcorr (gtime_t time, const double *pos, const double *azel, double *var)
	SBAS tropospheric delay correction.

Variables
const sbsigpband_t	igpband1 [9][8]
const sbsigpband_t	igpband2 [2][5]

Detailed Description

MRTKLIB SBAS Module — SBAS message decoding and corrections.

This header declares all public SBAS functions extracted from sbas.c.

Note

All functions in this module are pure cut-and-paste extractions from sbas.c with zero algorithmic changes.

Definition in file mrtk_sbas.h.

Function Documentation

sbsdecodemsg()

int sbsdecodemsg	(	gtime_t	time,
		int	prn,
		const uint32_t *	words,
		sbsmsg_t *	sbsmsg )

Decode SBAS message frame words.

Parameters

[in]	time	Reception time
[in]	prn	SBAS satellite PRN number
[in]	words	SBAS message frame words (9 words)
[out]	sbsmsg	SBAS message

Returns

Status (1:ok, 0:error)

Definition at line 1080 of file mrtk_sbas.c.

References DTTOL, sbsmsg_t::msg, sbsmsg_t::prn, rtk_crc24q(), gtime_t::time, time2gpst(), sbsmsg_t::tow, trace(), and sbsmsg_t::week.

Referenced by decode_rxmsfrb(), and decode_xe5bit().

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sbsioncorr()

int sbsioncorr	(	gtime_t	time,
		const nav_t *	nav,
		const double *	pos,
		const double *	azel,
		double *	delay,
		double *	var )

SBAS ionospheric delay correction.

Parameters

[in]	time	Reception time
[in]	nav	Navigation data
[in]	pos	Receiver position {lat, lon, h} (rad, m)
[in]	azel	Azimuth/elevation angle {az, el} (rad)
[out]	delay	Ionospheric delay (L1) (m)
[out]	var	Variance of ionospheric delay (m^2)

Returns

Status (1:ok, 0:error)

Definition at line 823 of file mrtk_sbas.c.

References sbsigp_t::delay, ionppp(), R2D, nav_s::sbsion, searchigp(), timediff(), trace(), and varicorr().

Referenced by ionocorr().

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sbsoutmsg()

void sbsoutmsg	(	FILE *	fp,
		sbsmsg_t *	sbsmsg )

Output SBAS message record.

Parameters

[in]	fp	Output file pointer
[in]	sbsmsg	SBAS message

Definition at line 732 of file mrtk_sbas.c.

References sbsmsg_t::msg, sbsmsg_t::prn, sbsmsg_t::tow, trace(), and sbsmsg_t::week.

Referenced by convsbs().

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sbsreadmsg()

int sbsreadmsg	(	const char *	file,
		int	sel,
		sbs_t *	sbs )

Read SBAS message file.

Parameters

[in]	file	SBAS message file path
[in]	sel	SBAS satellite selection (0:all)
[in,out]	sbs	SBAS messages

Returns

Status (1:ok, 0:error)

Definition at line 719 of file mrtk_sbas.c.

References sbsreadmsgt(), and trace().

Referenced by readpreceph().

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sbsreadmsgt()

int sbsreadmsgt	(	const char *	file,
		int	sel,
		gtime_t	ts,
		gtime_t	te,
		sbs_t *	sbs )

Read SBAS message file with time span.

Parameters

[in]	file	SBAS message file path
[in]	sel	SBAS satellite selection (0:all)
[in]	ts	Time start (ts.time==0: no limit)
[in]	te	Time end (te.time==0: no limit)
[in,out]	sbs	SBAS messages

Returns

Status (1:ok, 0:error)

Definition at line 682 of file mrtk_sbas.c.

References cmpmsgs(), expath(), free, malloc, MAXEXFILE, sbs_t::msgs, sbs_t::n, readmsgs(), and trace().

Referenced by sbsreadmsg().

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sbssatcorr()

int sbssatcorr	(	gtime_t	time,
		int	sat,
		const nav_t *	nav,
		double *	rs,
		double *	dts,
		double *	var )

SBAS satellite ephemeris and clock correction.

Parameters

[in]	time	Reception time
[in]	sat	Satellite number
[in]	nav	Navigation data
[in,out]	rs	Satellite position/velocity (corrected)
[out]	dts	Satellite clock correction
[out]	var	Variance of correction

Returns

Status (1:ok, 0:error)

Definition at line 1047 of file mrtk_sbas.c.

sbstropcorr()

double sbstropcorr	(	gtime_t	time,
		const double *	pos,
		const double *	azel,
		double *	var )

SBAS tropospheric delay correction.

Parameters

[in]	time	Reception time
[in]	pos	Receiver position {lat, lon, h} (rad, m)
[in]	azel	Azimuth/elevation angle {az, el} (rad)
[out]	var	Variance of tropospheric delay (m^2)

Returns

Tropospheric delay (m)

Definition at line 930 of file mrtk_sbas.c.

References getmet(), PI, R2D, time2doy(), and trace().

Referenced by tropcorr().

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sbsupdatecorr()

int sbsupdatecorr	(	const sbsmsg_t *	msg,
		nav_t *	nav )

Update SBAS corrections in navigation data.

Parameters

[in]	msg	SBAS message
[in,out]	nav	Navigation data

Returns

Message type (0:error)

Definition at line 517 of file mrtk_sbas.c.

References decode_sbstype1(), decode_sbstype18(), decode_sbstype2(), decode_sbstype24(), decode_sbstype25(), decode_sbstype26(), decode_sbstype6(), decode_sbstype7(), decode_sbstype9(), getbitu(), sbsmsg_t::msg, nav_s::sbsion, nav_s::sbssat, trace(), and sbsmsg_t::week.

Referenced by convsbs(), inputobs(), and update_sbs().

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Variable Documentation

igpband1

const sbsigpband_t igpband1[9][8]

extern

Definition at line 86 of file mrtk_sbas.c.

Referenced by decode_sbstype18().

igpband2

const sbsigpband_t igpband2[2][5]

extern

Definition at line 159 of file mrtk_sbas.c.

Referenced by decode_sbstype18().