Description
Earth-centered coordinate systems for defining certain propagators.
Members
| Member | Value | Description |
|---|---|---|
| eCoordinateSystemUnknown | -1 | Represents coordinate system not supported by the Object Model |
| eCoordinateSystemAlignmentAtEpoch | 0 | Alignment at Epoch: an inertial system coincident with ECF at the Coord Epoch. Often used to specify launch trajectories. |
| eCoordinateSystemB1950 | 1 | B1950: X points toward the mean vernal equinox and Z points along the mean rotation axis of the Earth at the beginning of the Besselian year 1950 and corresponds to 31 December 1949 22:09:07.2 or JD 2433282.423. |
| eCoordinateSystemFixed | 2 | Fixed: X is fixed at 0 deg longitude, Y is fixed at 90 deg longitude, and Z is directed toward the north pole. |
| eCoordinateSystemJ2000 | 3 | J2000: X points toward the mean vernal equinox and Z points along the mean rotation axis of the Earth on 1 Jan 2000 at 12:00:00.00 TDB, which corresponds to JD 2451545.0 TDB. |
| eCoordinateSystemMeanOfDate | 4 | Mean of Date: X points toward the mean vernal equinox and Z points along the mean rotation axis of the Earth at the Orbit Epoch. |
| eCoordinateSystemMeanOfEpoch | 5 | Mean of Epoch: X points toward the mean vernal equinox and Z points along the mean rotation axis of the Earth at the Coord Epoch. |
| eCoordinateSystemTEMEOfDate | 6 | TEME of Date: X points toward the mean vernal equinox and Z points along the true rotation axis of the Earth at the Orbit Epoch. |
| eCoordinateSystemTEMEOfEpoch | 7 | TEME of Epoch: X points toward the mean vernal equinox and Z points along the true rotation axis of the Earth at the Coord Epoch. |
| eCoordinateSystemTrueOfDate | 8 | True of Date: X points toward the true vernal equinox and Z points along the true rotation axis of the Earth at the Orbit Epoch. |
| eCoordinateSystemTrueOfEpoch | 9 | True of Epoch: X points toward the true vernal equinox and Z points along the true rotation axis of the Earth at the Coord Epoch. |
| eCoordinateSystemTrueOfRefDate | 10 | True of Ref Date: A special case of True of Epoch. Instead of the Coord Epoch, this system uses a Reference Date defined in the Integration Control page of the scenario's PODS properties. |
| eCoordinateSystemICRF | 11 | ICRF: International Celestial Reference Frame. |
| eCoordinateSystemMeanEarth | 13 | Mean Earth |
| eCoordinateSystemFixedNoLibration | 14 | uses an analytic formula not modeling lunar libration |
| eCoordinateSystemFixedIAU2003 | 15 | Fixed_IAU2003 |
| eCoordinateSystemPrincipalAxes421 | 16 | PrincipalAxes_421 |
| eCoordinateSystemPrincipalAxes403 | 17 | PrincipalAxes_403 |
| eCoordinateSystemInertial | 18 | Inertial |
| eCoordinateSystemJ2000Ecliptic | 19 | The mean ecliptic system evaluated at the J2000 epoch. The mean ecliptic plane is defined as the rotation of the J2000 XY plane about the J2000 X axis by the mean obliquity defined using FK5 IAU76 theory. |
| eCoordinateSystemTrueEclipticOfDate | 21 | The true ecliptic system, evaluated at each given time. The true ecliptic plane is defined as the rotation of the J2000 XY plane about the J2000 X axis by the true obliquity defined using FK5 IAU76 theory. |
| eCoordinateSystemPrincipalAxes430 | 22 | PrincipalAxes_430 |
| eCoordinateSystemTrueOfDateRotating | 23 | TrueOfDateRotating: Like the Fixed system, but ignores pole wander. The XY plane is the same as the XY plane of the TrueOfDate system, and the system rotates about the TrueOfDate Z-axis. |
| eCoordinateSystemEclipticJ2000ICRF | 24 | EclipticJ2000ICRF: An ecliptic system that is a fixed offset of the ICRF system, found by rotating the ICRF system about its X-axis by the mean obliquity at the J2000 epoch (i.e., 84381.448 arcSecs). The ecliptic plane is the XY-plane of this system. |