Revert to default ephemeris data - AWS Ground Station
Reverting TLE and OEM ephemeridesManaging azimuth elevation ephemerides

Revert to default ephemeris data

When you upload custom ephemeris data it will override the default ephemerides AWS Ground Station uses for that particular satellite. AWS Ground Station does not use the default ephemeris again until there are no currently enabled, unexpired customer-provided ephemerides available for use. AWS Ground Station also does not list contacts past the expiration time of the current customer-provided ephemeris, even if there is a default ephemeris available past that expiration time.

Note

Azimuth elevation ephemerides do not have default values and do not override satellite ephemerides. They are explicitly selected when reserving a contact using the trackingOverrides parameter. If you no longer wish to use azimuth elevation ephemeris, simply reserve contacts without specifying tracking overrides, and the system will use the active satellite ephemeris instead.

Reverting TLE and OEM ephemerides

To revert back to the default Space-Track ephemerides for a satellite, you will need to do one of the following:

  • Delete (using DeleteEphemeris) or disable (using UpdateEphemeris) all enabled customer-provided ephemerides. You can list the customer-provided ephemerides for a satellite using ListEphemerides.

  • Wait for all existing customer-provided ephemerides to expire.

You can confirm that the default ephemeris is being used by calling GetSatellite and verifying that the source of the current ephemeris for the satellite is SPACE_TRACK. See Default ephemeris data for more information on default ephemerides.

Managing azimuth elevation ephemerides

Since azimuth elevation ephemerides are explicitly selected for each contact and are not associated with satellites, there is no concept of "reverting" to a default. Instead, you can manage azimuth elevation ephemerides as follows:

  • To stop using azimuth elevation ephemeris: Simply reserve new contacts without specifying trackingOverrides and specifying a satelliteArn. The contact will use the active ephemeris for the specified satellite instead.

  • To remove unused azimuth elevation ephemerides: Use DeleteEphemeris to delete azimuth elevation ephemerides that are no longer needed. Note that you cannot delete an ephemeris that is currently being used by a scheduled contact.

To list all azimuth elevation ephemerides in your account, use ListEphemerides. Azimuth elevation ephemerides can be identified by the ephemerisType field, or by the presence of a groundStation field instead of a satelliteId field in the response.