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NOVAS31Refract Method

Computes atmospheric refraction in zenith distance.

Namespace:  ASCOM.Astrometry.NOVAS
Assembly:  ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 3351c4f3fa64146a7efd5b51ed4591e32a0a5484
Syntax
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public double Refract(
	OnSurface Location,
	RefractionOption RefOption,
	double ZdObs
)

Parameters

Location
Type: ASCOM.AstrometryOnSurface
Structure containing observer's location.
RefOption
Type: ASCOM.AstrometryRefractionOption
1 ... Use 'standard' atmospheric conditions; 2 ... Use atmospheric parameters input in the 'Location' structure.
ZdObs
Type: SystemDouble
Observed zenith distance, in degrees.

Return Value

Type: Double
Atmospheric refraction, in degrees.
Remarks
This version computes approximate refraction for optical wavelengths. This function can be used for planning observations or telescope pointing, but should not be used for the reduction of precise observations.
See Also