psGrommit Struct Reference
[Astrometry Functions]

#include <psAstrometry.h>

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Detailed Description

Wallace's Grommit.

SLALib requires several elements to perform the transformations between the tangent plane and the sky. Pre-computing these quantities for each exposure means that subsequent transformations are faster. For historical reasons, this structure is known colloquially as "Wallace's Grommit".

Definition at line 44 of file psAstrometry.h.

Data Fields
const double	latitude
	geodetic latitude (radians)
const double	sinLat
	sine of geodetic latitude
const double	cosLat
	cosine of geodetic latitude
const double	abberationMag
	magnitude of diurnal aberration vector
const double	height
	height (HM)
const double	temperature
	ambient temperature (TDK)
const double	pressure
	pressure (PMB)
const double	humidity
	relative humidity (RH)
const double	wavelength
	wavelength (WL)
const double	lapseRate
	lapse rate (TLR)
const double	refractA
	refraction constant A (radians)
const double	refractB
	refraction constant B (radians)
const double	longitudeOffset
	longitude + ... (radians)
const double	siderealTime
	local apparent sidereal time (radians)

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Field Documentation

const double psGrommit::abberationMag

magnitude of diurnal aberration vector Definition at line 49 of file psAstrometry.h.

const double psGrommit::cosLat

cosine of geodetic latitude Definition at line 48 of file psAstrometry.h.

const double psGrommit::height

height (HM) Definition at line 50 of file psAstrometry.h.

const double psGrommit::humidity

relative humidity (RH) Definition at line 53 of file psAstrometry.h.

const double psGrommit::lapseRate

lapse rate (TLR) Definition at line 55 of file psAstrometry.h.

const double psGrommit::latitude

geodetic latitude (radians) Definition at line 46 of file psAstrometry.h.

const double psGrommit::longitudeOffset

longitude + ... (radians) Definition at line 58 of file psAstrometry.h.

const double psGrommit::pressure

pressure (PMB) Definition at line 52 of file psAstrometry.h.

const double psGrommit::refractA

refraction constant A (radians) Definition at line 56 of file psAstrometry.h.

const double psGrommit::refractB

refraction constant B (radians) Definition at line 57 of file psAstrometry.h.

const double psGrommit::siderealTime

local apparent sidereal time (radians) Definition at line 59 of file psAstrometry.h.

const double psGrommit::sinLat

sine of geodetic latitude Definition at line 47 of file psAstrometry.h.

const double psGrommit::temperature

ambient temperature (TDK) Definition at line 51 of file psAstrometry.h.

const double psGrommit::wavelength

wavelength (WL) Definition at line 54 of file psAstrometry.h.

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

• psAstrometry.h

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