CcsdsOrbitEphemerisMessageSegmentReferenceFrame Property |
Gets or sets the reference frame in which the ephemeris data is given.
This value is not provided automatically by ReadFrom(String) because the reference frames given in OEM metadata are not necessarily supported as ReferenceFrame objects.
If this is not provided by the user, an attempt will be made to infer the reference frame from the given center, reference frame, and reference frame epoch data. If this attempt fails, will be returned.
The reference frame inference attempts to associate center names and reference frame names from the SANA website with reference frames available from the CentralBody, SolarSystemBarycenter, and PlanetarySystemBarycenter types. Only a subset of the SANA reference frames are supported, so it may be necessary for the user to manually create their own reference frames.
Namespace: AGI.Foundation.Ccsds
Assembly: AGI.Foundation.Models (in AGI.Foundation.Models.dll) Version: 24.3.420.0 (24.3.420.0)
SyntaxRemarksThe supported reference frames for Earth are listed below:
- ALIGN_EARTH is formed by creating a new AxesFixedAtJulianDate from the Axes of the FixedFrame at the ReferenceFrameEpoch (which cannot be ). Those axes are then centered at the CenterOfMassPoint.
- GCRF, ICRF, and any other frame that starts with ICRF (e.g. ICRF1, ICRF2, etc.) is mapped to the InternationalCelestialReferenceFrame.
- EME2000 and J2000 are mapped to J2000Frame.
- J2000_ECLIPTIC is formed by rotating the Axes of J2000Frame by 84381.448 arc-seconds about its x-axis (Vernal equinox direction). Those axes are then centered at the CenterOfMassPoint.
- MOD and MOD_EARTH are mapped to the MeanEquatorMeanEquinoxFrame.
- TEME and TEMEOFDATE are mapped to TrueEquatorMeanEquinoxFrame.
- TEMEOFEPOCH is formed by creating a new AxesFixedAtJulianDate from the Axes of the TrueEquatorMeanEquinoxFrame at the ReferenceFrameEpoch (which cannot be ). Those axes are then centered at the CenterOfMassPoint.
- TOD and TOD_EARTH are mapped to TrueEquatorTrueEquinoxFrame.
- ITRF, FIXED_EARTH, ECR, ECEF, and ECF are mapped to FixedFrame.
- TDR, GRC, GCR, GTOD, EFG are mapped to PseudoFixedFrame.
The supported reference frames for most CentralBody derived types are as follows:
- FIXED and FIXED_CB are mapped to the FixedFrame of the body.
- INERTIAL and INERTIAL_CB are mapped to the InertialFrame of the body.
The Sun also has a J2000 and J2000_ECLIPTIC frames whose axes are defined in the same manner as those of the Earth with the CenterOfMassPoint as the center point.
The MCI frame is defined as the InertialFrame of MarsCentralBody.
INERTIAL and INERTIAL_CB can also be mapped to the inertial frames of the SolarSystemBarycenter or one of the PlanetarySystemBarycenters if the Center is one of the supported barycenters. Note that MERCURY BARYCENTER and VENUS BARYCENTER are not supported. It is suggested that Center be manually changed to MERCURY or VENUS under those circumstances.
See Also