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SARIN Coastal Ocean isardSAT Cryosat Data

Coverage:  The SARin activity will focus on two areas:
•    The coast of Chile, where Cryosat-2 tracks run almost parallel to the coast line.
•    The coast of Cuba, where Cryosat-2 tracks are perpendicular to the coast. (Lat 19-24N; Lon 73-86W)
Other SARin areas around the world will be also checked in order to find interesting tracks cases, taking into account not only the geometry of the coast with respect to the satellite track but also the coastal land topography
 

Time Period: The whole CryoSat-2 mission to date will be considered (The SARin mask over Cuba was  established on 1st October 2012)

Cryosat-2 Data Products Used: Cryosat-2 SARIN L1b and L2I products

Method: 
The study will consider the information provided in Cryosat-2 SARIN L1b and L2I products to derive the angle of arrival AoA of the echoes (that can be extracted from the phase difference), which combined with the sub-satellite ground track, should make it possible to build the actual reflection point and geo-locate it.
Moreover, a two steps processing will make possible, using the geophysical corrections from ESA products, to derive the SSH in coastal zones. The first step consists in a post-L1b dedicated algorithm that, based in the AoA, generates a seed for the retracker, avoiding the off-nadir (e.g. land contamination) signals. The second step is made by an in-house developed SARin retracker, that gives the final SSH.

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© Satellite Oceanographic Consultants Ltd 2012