EPH Struct Reference

Ephemeris parameters of one specific satellite. More...

#include <gpsdefs.h>

Data Fields
CSUM	csum
	checksum of the remaining bytes More...
int16_t	valid
	flag data are valid More...
HEALTH	health
	health indication of transmitting SV [—] More...
IOD	IODC
	Issue Of Data, Clock. More...
IOD	IODE2
	Issue of Data, Ephemeris (Subframe 2) More...
IOD	IODE3
	Issue of Data, Ephemeris (Subframe 3) More...
T_GPS	tt
	time of transmission More...
T_GPS	t0c
	Reference Time Clock [—]. More...
T_GPS	t0e
	Reference Time Ephemeris [—]. More...
double	sqrt_A
	Square Root of semi-major Axis [sqrt(m)]. More...
double	e
	Eccentricity [—]. More...
double	M0
	+- Mean Anomaly at Ref. Time [rad] More...
double	omega
	+- Argument of Perigee [rad] More...
double	OMEGA0
	+- Longit. of Asc. Node of orbit plane [rad] More...
double	OMEGADOT
	+- Rate of Right Ascension [rad/sec] More...
double	deltan
	+- Mean Motion Diff. from computed value [rad/sec] More...
double	i0
	+- Inclination Angle [rad] More...
double	idot
	+- Rate of Inclination Angle [rad/sec] More...
double	crc
	+- Cosine Corr. Term to Orbit Radius [m] More...
double	crs
	+- Sine Corr. Term to Orbit Radius [m] More...
double	cuc
	+- Cosine Corr. Term to Arg. of Latitude [rad] More...
double	cus
	+- Sine Corr. Term to Arg. of Latitude [rad] More...
double	cic
	+- Cosine Corr. Term to Inclination Angle [rad] More...
double	cis
	+- Sine Corr. Term to Inclination Angle [rad] More...
double	af0
	+- Clock Correction Coefficient 0 [sec] More...
double	af1
	+- Clock Correction Coefficient 1 [sec/sec] More...
double	af2
	+- Clock Correction Coefficient 2 [sec/sec^2] More...
double	tgd
	+- estimated group delay differential [sec] More...
uint16_t	URA
	predicted User Range Accuracy More...
uint8_t	L2code
	code on L2 channel [—] More...
uint8_t	L2flag
	L2 P data flag [—]. More...

Detailed Description

Ephemeris parameters of one specific satellite.

Needed to compute the position of a satellite at a given time with high precision. Valid for an interval of 4 to 6 hours from start of transmission.

Definition at line 18436 of file gpsdefs.h.

Field Documentation

af0

double EPH::af0

+- Clock Correction Coefficient 0 [sec]

Definition at line 18465 of file gpsdefs.h.

Referenced by swap_eph_doubles().

af1

double EPH::af1

+- Clock Correction Coefficient 1 [sec/sec]

Definition at line 18466 of file gpsdefs.h.

Referenced by swap_eph_doubles().

af2

double EPH::af2

+- Clock Correction Coefficient 2 [sec/sec^2]

Definition at line 18467 of file gpsdefs.h.

Referenced by swap_eph_doubles().

cic

double EPH::cic

+- Cosine Corr. Term to Inclination Angle [rad]

Definition at line 18462 of file gpsdefs.h.

Referenced by swap_eph_doubles().

cis

double EPH::cis

+- Sine Corr. Term to Inclination Angle [rad]

Definition at line 18463 of file gpsdefs.h.

Referenced by swap_eph_doubles().

crc

double EPH::crc

+- Cosine Corr. Term to Orbit Radius [m]

Definition at line 18458 of file gpsdefs.h.

Referenced by swap_eph_doubles().

crs

double EPH::crs

+- Sine Corr. Term to Orbit Radius [m]

Definition at line 18459 of file gpsdefs.h.

Referenced by swap_eph_doubles().

csum

CSUM EPH::csum

checksum of the remaining bytes

Definition at line 18438 of file gpsdefs.h.

cuc

double EPH::cuc

+- Cosine Corr. Term to Arg. of Latitude [rad]

Definition at line 18460 of file gpsdefs.h.

Referenced by swap_eph_doubles().

cus

double EPH::cus

+- Sine Corr. Term to Arg. of Latitude [rad]

Definition at line 18461 of file gpsdefs.h.

Referenced by swap_eph_doubles().

deltan

double EPH::deltan

+- Mean Motion Diff. from computed value [rad/sec]

Definition at line 18455 of file gpsdefs.h.

Referenced by swap_eph_doubles().

e

double EPH::e

Eccentricity [—].

Definition at line 18450 of file gpsdefs.h.

Referenced by swap_eph_doubles().

health

HEALTH EPH::health

health indication of transmitting SV [—]

Definition at line 18441 of file gpsdefs.h.

i0

double EPH::i0

+- Inclination Angle [rad]

Definition at line 18456 of file gpsdefs.h.

Referenced by swap_eph_doubles().

idot

double EPH::idot

+- Rate of Inclination Angle [rad/sec]

Definition at line 18457 of file gpsdefs.h.

Referenced by swap_eph_doubles().

IODC

IOD EPH::IODC

Issue Of Data, Clock.

Definition at line 18442 of file gpsdefs.h.

IODE2

IOD EPH::IODE2

Issue of Data, Ephemeris (Subframe 2)

Definition at line 18443 of file gpsdefs.h.

IODE3

IOD EPH::IODE3

Issue of Data, Ephemeris (Subframe 3)

Definition at line 18444 of file gpsdefs.h.

L2code

uint8_t EPH::L2code

code on L2 channel [—]

Definition at line 18472 of file gpsdefs.h.

L2flag

uint8_t EPH::L2flag

L2 P data flag [—].

Definition at line 18473 of file gpsdefs.h.

M0

double EPH::M0

+- Mean Anomaly at Ref. Time [rad]

Definition at line 18451 of file gpsdefs.h.

Referenced by swap_eph_doubles().

omega

double EPH::omega

+- Argument of Perigee [rad]

Definition at line 18452 of file gpsdefs.h.

Referenced by swap_eph_doubles().

OMEGA0

double EPH::OMEGA0

+- Longit. of Asc. Node of orbit plane [rad]

Definition at line 18453 of file gpsdefs.h.

Referenced by swap_eph_doubles().

OMEGADOT

double EPH::OMEGADOT

+- Rate of Right Ascension [rad/sec]

Definition at line 18454 of file gpsdefs.h.

Referenced by swap_eph_doubles().

sqrt_A

double EPH::sqrt_A

Square Root of semi-major Axis [sqrt(m)].

Definition at line 18449 of file gpsdefs.h.

Referenced by swap_eph_doubles().

t0c

T_GPS EPH::t0c

Reference Time Clock [—].

Definition at line 18446 of file gpsdefs.h.

t0e

T_GPS EPH::t0e

Reference Time Ephemeris [—].

Definition at line 18447 of file gpsdefs.h.

tgd

double EPH::tgd

+- estimated group delay differential [sec]

Definition at line 18468 of file gpsdefs.h.

Referenced by swap_eph_doubles().

tt

T_GPS EPH::tt

time of transmission

Definition at line 18445 of file gpsdefs.h.

URA

uint16_t EPH::URA

predicted User Range Accuracy

Definition at line 18470 of file gpsdefs.h.

valid

int16_t EPH::valid

flag data are valid

Definition at line 18439 of file gpsdefs.h.

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The documentation for this struct was generated from the following file:

• mbglib/common/gpsdefs.h