TDRS Observations

Top  Previous  Next

The TDRS Observation represents an observation of a spacecraft from a site on the ground of a CelestialObject, relayed through a TDRS transponder. The measurement types available for these observations are:

 

One-way Doppler

Two-way Doppler

Two-way Range

 

When working with TDRS Observations, you have the option to include the following corrections:

 

Ionospheric Correction

Light Time Correction

Tropospheric Correction

 

The tropospheric correction calculation relies on the GroundStation.MonthlyRefractivity property, so it is possible to configure different values for the refractivity when simulating the measurements vs. when processing. Similarly, the ionospheric correction calculation relies on the FF_SolarSystem.IonosphereOptions.ScaleFactor property, which can be configured to scale the ionospheric correction values differently for simulating vs. processing. The ground antenna and spacecraft transponder frequencies are also used in computing the ionospheric and tropospheric corrections.

 

The following tracking data formats supported by FreeFlyer can contain TDRS Observations:

 

TDRS UTDF Files

 

For more information on creating simulated TDRS Observations, see the Simulating Tracking Data page.

 

 

See Also


TDRSObservation Properties and Methods