Data Provider Groups | Data Provider Elements
Earth Fixed Frame
The attitude of the Earth fixed frame.Available for these objects: Scenario
Type: Time-varying data.
Availability: Reports | Graphs | Dynamic Displays | Strip Charts
Data Provider Groups
| Name | Description |
|---|---|
| FK5-IAU76 | Earth's attitude is calculated using the FK5-IAU76 theory (i.e., the theory behind the J2000 frame). |
| ICRF | Earth's attitude expressed with respect to the ICRF frame, often denoted as the GCRF. |
| Orientation Difference | The angle representing the difference in orientation between the J2000 and ICRF axes at the given time. |
Data Provider Elements
| FK5-IAU76 | |||
|---|---|---|---|
| Name | Dimension | Type | Description |
| Time | Date | Real Number or Text | Time. |
| Pole Right Ascension | Longitude | Real Number or Text | The right ascension of the pole of the Earth with respect to the J2000 frame. |
| Pole Declination | Latitude | Real Number or Text | The declination of the pole of the Earth with respect to the J2000 frame. |
| Rotation Angle | Longitude | Real Number or Text | The angle of the Earth Fixed X axis from the node. The node is the direction defined by by the cross product of the J2000 Z axis and the Earth Fixed Z axis. |
| ICRF | |||
|---|---|---|---|
| Name | Dimension | Type | Description |
| Time | Date | Real Number or Text | Time. |
| Pole Right Ascension | Longitude | Real Number or Text | The right ascension of the pole of the Earth with respect to the J2000 frame. |
| Pole Declination | Latitude | Real Number or Text | The declination of the pole of the Earth with respect to the J2000 frame. |
| Rotation Angle | Longitude | Real Number or Text | The angle of the Earth Fixed X axis from the node. The node is the direction defined by by the cross product of the J2000 Z axis and the Earth Fixed Z axis. |
| Orientation Difference | |||
|---|---|---|---|
| Name | Dimension | Type | Description |
| Time | Date | Real Number or Text | Time. |
| Angle between frames | Angle | Real Number or Text | The angle between the J2000 and ICRF frames. |
| Angle between X axes | Angle | Real Number or Text | The angle between the J2000 X axis and the ICRF X axis. |
| Angle between Y axes | Angle | Real Number or Text | The angle between the J2000 Y axis and the ICRF Y axis. |
| Angle between Z axes | Angle | Real Number or Text | The angle between the J2000 Z axis and the ICRF Z axis. |
| Euler 321 Yaw | Angle | Real Number or Text | The first rotation (about the 3 axis, ie. Z axis) in a 321 Euler sequence that rotates the ICRF frame into the J2000 frame. |
| Euler 321 Pitch | Angle | Real Number or Text | The second rotation (about the new 2 axis, ie. new Y axis) in a 321 Euler sequence that rotates the ICRF frame into the J2000 frame. |
| Euler 321 Roll | Angle | Real Number or Text | The third rotation (about the newest 1 axis, ie. newest Z axis) in a 321 Euler sequence that rotates the ICRF frame into the J2000 frame. |
| Distance between frames at surface | Distance | Real Number | The value of the Earth's equatorial distance multiplied by the angle between the J2000 and ICRF frame. |
| Distance between frames at GPS | Distance | Real Number | The value of the typical GPS radius distance multiplied by the angle between the J2000 and ICRF frame. |
| Distance between frames at GEO | Distance | Real Number | The value of the typical GEO radius distance multiplied by the angle between the J2000 and ICRF frame. |