Verify normalization in rtcApp.py

isce-framework / isce2

InSAR Scientific Computing Environment version 2

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Verify normalization in rtcApp.py #70

Closed piyushrpt closed 4 years ago

piyushrpt commented 5 years ago

rtcApp appears to use the following equation: https://github.com/isce-framework/isce2/blob/master/components/isceobj/RtcProc/runNormalize.py#L45

This suggests that the input image was in sigma0 to start with like UAVSAR. I think the correct term is just the numerator term if Sentinel1 GRD data was unpacked to beta0.

@MIRSL can you confirm the interpretation?

sgk0 commented 4 years ago

The normalization should be fine, it is the formula for the projection angle approach (Ulander 1996), see this thread: http://earthdef.caltech.edu/boards/4/topics/3093.

piyushrpt commented 4 years ago

Great. Thanks for confirming. Closing this.