LAL: EarthState Struct Reference


Data Fields
REAL8	einstein
	the einstein delay equiv TDB - TDT
REAL8	deinstein
	d(einstein)/d(tgps)
REAL8	posNow [3]
	Cartesian coords of Earth's center at tgps, extrapolated from JPL DE405 ephemeris; units= sec.
REAL8	velNow [3]
	dimensionless velocity of Earth's center at tgps, extrapolated from JPL DE405 ephemeris
REAL8	gmstRad
	Greenwich Mean Sidereal Time (GMST) in radians, at tgps.
REAL8	gastRad
	Greenwich Apparent Sidereal Time, in radians, at tgps; Is basically the angle thru which Earth has spun at given time; gast is like gmst, but has additional correction for short-term nutation.
REAL8	tzeA
	variable describing effect of lunisolar precession, at tgps
REAL8	zA
	variable describing effect of lunisolar precession, at tgps
REAL8	thetaA
	variable describing effect of lunisolar precession, at tgps
REAL8	delpsi
	variable describing effect of Earth nutation, at tgps
REAL8	deleps
	variable describing effect of Earth nutation, at tgps
REAL8	se [3]
	vector that points from Sun to Earth at instant tgps, in DE405 coords; units = sec
REAL8	dse [3]
	d(se[3])/d(tgps); Dimensionless
REAL8	rse
	length of vector se[3]; units = sec
REAL8	drse
	d(rse)/d(tgps); dimensionless

Detailed Description

Field Documentation

REAL8 EarthState::einstein

the einstein delay equiv TDB - TDT

Definition at line 292 of file LALBarycenter.h.

REAL8 EarthState::deinstein

d(einstein)/d(tgps)

Definition at line 293 of file LALBarycenter.h.

REAL8 EarthState::posNow[3]

Cartesian coords of Earth's center at tgps, extrapolated from JPL DE405 ephemeris; units= sec.

Definition at line 295 of file LALBarycenter.h.

REAL8 EarthState::velNow[3]

dimensionless velocity of Earth's center at tgps, extrapolated from JPL DE405 ephemeris

Definition at line 297 of file LALBarycenter.h.

REAL8 EarthState::gmstRad

Greenwich Mean Sidereal Time (GMST) in radians, at tgps.

Definition at line 300 of file LALBarycenter.h.

REAL8 EarthState::gastRad

Greenwich Apparent Sidereal Time, in radians, at tgps; Is basically the angle thru which Earth has spun at given time; gast is like gmst, but has additional correction for short-term nutation.

Definition at line 301 of file LALBarycenter.h.

REAL8 EarthState::tzeA

variable describing effect of lunisolar precession, at tgps

Definition at line 306 of file LALBarycenter.h.

REAL8 EarthState::zA

variable describing effect of lunisolar precession, at tgps

Definition at line 307 of file LALBarycenter.h.

REAL8 EarthState::thetaA

variable describing effect of lunisolar precession, at tgps

Definition at line 308 of file LALBarycenter.h.

REAL8 EarthState::delpsi

variable describing effect of Earth nutation, at tgps