Crossover Derived Parameters     

This section provides results from crossover processing of 30 and 60-day data takes of Level-2 GDR-A.

Measuring the elevation residual at orbit crossover points is a primary method of assessing the performance of the altimeter and the processing chain. Over time intervals where there is no expected change in the surface elevation the elevation difference at a crossover provides a measure of altimeter and chain performance, height error and antenna polarity issues.