Transponder Setup

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You can configure the Orbit Determination Properties for a Transponder through FreeFlyer script or the Object Browser. There are two ways to navigate to the "Estimation Properties" page of the Transponder object editor:


1.Open the desired Transponder's editor

2.Highlight the desired Transponder on the "Objects to Process" page of a Kalman Filter, Square Root Information Filter, Unscented Kalman Filter, or Batch Least Squares object editor and click the "Modify Transponder Estimation Options" button


From this page, you can configure any of these options:


The Transponder send and receive frequencies

Whether to ignore, estimate, or consider the Transponder Delay

oIgnore: Leave the property out of the estimated state.

oEstimate: Include the property in the estimated state and allow the estimator to update its value.

oConsider: Include the property in the estimated state, but do NOT allow the estimator to update its value. This means that the property gets included in the covariance, but is not directly estimated.

The A Priori Bias, Sigma, and Process Noise for the Delay


Transponder OD Properties

Transponder OD Properties


To define the Transponder properties that you want to estimate or consider via FreeForm script, you will access the Transponder's OD properties, as shown in the example below:


Spacecraft1.Transponders[0].OD.TransponderDelay.ProcessAction = 1;


Once the Transponder has been configured, it can be used as an object being observed when simulating tracking data or including tracking data in an estimation process.



Attached Sensors

The Attached Sensors page of the Transponder object editor allows you to indicate any Sensors that will be attached to the Transponder for simulating or processing OD tracking data. The Sensor's X, Y, and Z position properties will be used to model an offset from the origin of the Spacecraft body coordinate system (BCS) when modeling measurements. You can also specify the Sensors to attach or detach via FreeFlyer script:







See Also

Transponder Properties and Methods

TransponderODProperties Properties and Methods