PF-ASAR Burst-Mode processing Introduction. Algorithms Descalloping options Beam Merging Algorithm APS processing AP channel miss-alignment at SWST changes Conclusions. Betlem Rosich ESA-ESRIN. PF-ASAR Burst-Mode Processing Algorithms.
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WSM descalloping in PF-ASAR
WSM descalloping in PF-ASAR – SS5 example
Current settings: No descalloping applied
Current settings: Constant SNR descalloping LUT. Improved azimuth patterns to be used
IMM descalloping in PF-ASAR (II)
Currrent settings: Inverse of the azimuth antenna
Scalloping visible only :
- over the sea in case of wind/sea-currents.
- anywhere in case Doppler interpolation anomalies occur
-> Optimised azimuth antennas to be used
Total overlap region
Beam Merging Strategy
Beam merging: strategy to combine the ScanSAR WSM and GMM independent beam images on the overlapping areas.
p = 1 linear weighting
P = -1 only near beam contributes to the merged one
p = 0 only far beam contributes to the merged
P = > 1 near beam is favoured