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IersTechnicalNote21 Class

Provides Earth orientation parameters according to the IERS Technical Note 21.
Inheritance Hierarchy
SystemObject
  AGI.Foundation.CelestialIersTechnicalNote21

Namespace:  AGI.Foundation.Celestial
Assembly:  AGI.Foundation.Models (in AGI.Foundation.Models.dll) Version: 19.2.399.0 (19.2.399.0)
Syntax
public static class IersTechnicalNote21

The IersTechnicalNote21 type exposes the following members.

Properties
  NameDescription
Public propertyStatic memberUpdated1980NutationModel
Gets an instance of the nutation model published by the IERS in 1996 to modify the fundamental arguments of the IAU1980 Nutation theory.
Public propertyStatic memberUpdatedEquationOfEquinoxes
Gets an instance of the updated equation of the equinoxes published by the IERS in 1996. The updated equation defines the right ascension of the mean equinox with respect to the true equator and equinox with the addition of periodic terms involving the right ascension of the moon.
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Methods
  NameDescription
Public methodStatic memberGetGreenwichHourAngle
Computes the hour angle measured using the Greenwich mean sidereal time.
Public methodStatic memberGetGreenwichMeanSiderealTime
Computes the mean sidereal time of Greenwich at the provided Julian date.
Public methodStatic memberGetGreenwichMeanSiderealTimeOfMidnight
Computes the mean sidereal time of Greenwich at 0hr UT1 on the provided Julian date.
Public methodStatic memberGetGreenwichTrueSiderealTimeEvaluator
Gets an evaluator that computes the true sidereal time of Greenwich.

The result of evaluating will be a Motion<double> which represents the value of the Greenwich true sidereal time in seconds at the given JulianDate. No derivatives are provided.

Public methodStatic memberGetGreenwichTrueSiderealTimeEvaluator(EvaluatorGroup)
Gets an evaluator that computes the true sidereal time of Greenwich.

The result of evaluating will be a Motion<double> which represents the value of the Greenwich true sidereal time in seconds at the given JulianDate. No derivatives are provided.

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See Also