Abstract's details
A new method to determine the antenna pointing directly from Altimeter SAR mode data
CoAuthors
Event: 2015 Ocean Surface Topography Science Team Meeting
Session: Instrument Processing: Measurement and retracking (SAR and LRM)
Presentation type: Type Poster
Contribution: not provided
Abstract:
Recently we showed that it is possible to compensate the amplitude variations of the delay-Doppler map that are not related to the sea state and likewise also compensate for a dilation of range that causes a variation along track in the power. With both amplitude compensation (AC) and dilation compensation (DC) the resultant AC/DC delay-Doppler map is much simpler.
Here is presented an application of that simplified delay-Doppler map (or stack).
It is shown that because of the simple shape of the AC/DC delay-Doppler map the antenna pointing can be computed algebraically from the AC/DC delay-Doppler map.
This technique has been validated using simulated data, and then it is used to estimate the bias of the CryoSat star-tracker and compared to other previously presented methods.
This work has been carried out under the ESTEC/ESA contract to develop the Sentinel-6 Poseidon-4 Level 1 Ground Processor Prototype.
Here is presented an application of that simplified delay-Doppler map (or stack).
It is shown that because of the simple shape of the AC/DC delay-Doppler map the antenna pointing can be computed algebraically from the AC/DC delay-Doppler map.
This technique has been validated using simulated data, and then it is used to estimate the bias of the CryoSat star-tracker and compared to other previously presented methods.
This work has been carried out under the ESTEC/ESA contract to develop the Sentinel-6 Poseidon-4 Level 1 Ground Processor Prototype.