Supported Coordinate Systems
Click the name of the frame for its description.
The VGT Central Body Frame list is not exhaustive. For a complete list of VGT central body frames, go to the Vector Geometry tool in Analysis Workbench and select a specific primary or secondary body or an object on a particular central body. All supported VGT components, including reference frames, will be displayed for your selection.
| Central Body Frame | VGT Central Body Frame |
Earth
|
Moon
|
Sun
|
All Others
|
|---|---|---|---|---|---|
| ICRF | ICRF |
Y
|
Y
|
Y
|
Y
|
| J2000 | J2000 |
Y
|
Y
|
Y
|
Y
|
| Inertial | Inertial |
Y*
|
Y
|
Y*
|
Y
|
| Fixed | Fixed |
Y
|
Y
|
Y
|
Y
|
| TrueOfDate | TOD |
Y
|
Y
|
Y
|
Y
|
| TrueOfEpoch | TrueOfEpoch |
Y
|
Y
|
Y
|
Y
|
| MeanOfDate | MOD |
Y
|
Y
|
Y
|
Y
|
| MeanOfEpoch | n/a |
Y
|
Y
|
|
|
| TEMEOfDate | TEMED |
Y
|
|
|
|
| TEMEOfEpoch | TEMEOfEpoch |
Y
|
|
|
|
| B1950 | B1950 |
Y
|
|
|
|
| AlignmentAtEpoch | AlignmentAtEpoch |
Y
|
|
|
|
| MeanEarth | MeanEarth |
|
Y
|
|
|
| PrincipalAxes_403 | PrincipalAxes_403 |
|
Y
|
|
|
| PrincipalAxes_430 | PrincipalAxes_430 |
|
Y
|
|
|
| PrincipalAxes_421 | PrincipalAxes_421 | Y |
|||
| Fixed_IAU2003 | Fixed_IAU2003 |
|
Y
|
|
|
| Fixed_NoLibration | Fixed_NoLibration |
|
Y
|
|
|
| ITRF | ITRF | Y | |||
| ITRFYYYY** | n/a | Y | |||
| J2000_Ecliptic | SunMeanEclpJ2000 |
|
|
Y
|
|
| EclipticJ2000ICRF | EclipticJ2000ICRF | Y | |||
| TrueEclipticOfDate | TrueEclpDate |
|
|
Y
|
|
| n/a | FixedAtJ2000 | Y |
Y |
Y |
Y |
| n/a | MOJ2000 | Y |
Y |
Y |
Y |
| n/a | TOJ2000 | Y |
Y |
Y |
Y |
| n/a | TEMEJ2000 | Y |
Y |
Y |
Y |
| n/a | TETEGM | |
|
Y |
|
| n/a | PseudoFixed | Y |
|
|
|
Y* - The Inertial frame for the Earth and the Sun is ICRF; these bodies do not have a separate system named Inertial.
YYYY** - ITRFYYYY refers to a set of ITRF frames specified by a four-digit year (e.g., ITRF2020, ITRF2014, ITRF2000, etc.). When the central body is Earth, these frames are available for import and export of external data but not for reporting. For a list of specific ITRFYYYY frames that STK supports, see the text file ITRFDefns.txt located in C:\ProgramData\AGI\STK 12\DynamicEarthData.