NovasNutationAngles Method
Returns the values for nutation in longitude and nutation in obliquity for a given TDB Julian date.
Namespace: ASCOM.Tools.Novas31Assembly: ASCOM.AstrometryTools (in ASCOM.AstrometryTools.dll) Version: 3.0.0-rc.1+86c25ce733aebb4d8b1b8a62e84770ea5e972bea
public static void NutationAngles(
double t,
Accuracy Accuracy,
ref double DPsi,
ref double DEps
)
Public Shared Sub NutationAngles (
t As Double,
Accuracy As Accuracy,
ByRef DPsi As Double,
ByRef DEps As Double
)
Parameters
- t Double
- TDB time in Julian centuries since J2000.0
- Accuracy Accuracy
- Selection for accuracy
- DPsi Double
- Nutation in longitude in arcseconds.
- DEps Double
- Nutation in obliquity in arcseconds.
The nutation model selected depends upon the input value of 'Accuracy'. See notes below for important details.
This function selects the nutation model depending first upon the input value of 'Accuracy'.
If 'Accuracy' = 0 (full accuracy), the IAU 2000A nutation model is used. If 'Accuracy' = 1
a specially truncated (and therefore faster) version of IAU 2000A, called 'NU2000K' is used.
Supported in: 2.0