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Coregistration of SAR Data: do results depend on software version?
Added by Peter Friedl over 9 years ago
Hi everybody,
There is something weird I observed with coregistration, I`d like to share with you: I was using a GAMMA version from 2013 and coregistration of my data worked pretty well. Now I am testing the newest version of GAMMA and suddenly the coregistration results (azimuth standard deviation/ range standard deviation and/or accepted offset estimations) are significantly worse, although I didn’t change any settings (window sizes, SNR threshold,…). I figured out that the coregistration quality differs with the version of the offset_pwr algorithm I used. Did anybody of you observe the same issue? Does anybody know the reason behind?
Replies (2)
RE: Coregistration of SAR Data: do results depend on software version? - Added by Thorsten Seehaus over 9 years ago
Hi Peter,
we got similar problems with the intensity tracking algorithm. The tracking on the same image pair, with the same parameters led to 2 different results. With the new gamma version we had nearly no tracking results. We contacted GAMMA but did not get an answer so far. You should also contact them! That`s a serious problem in the new gamma version.
RE: Coregistration of SAR Data: do results depend on software version? - Added by Peter Friedl over 9 years ago
Hi Thorsten,
a very pragmatic, but of course preliminary solution of this issue is to replace the new offset_pwr algorithm with the old one in /usr/local/GAMMA_SOFTWARE-20141211/ISP/bin/. If you can`t find the old algorithm I can send it to you or anybody else who`s interested. Just write me an Email(peter.friedl@dlr.de). Nonetheless this is a problem which has to be fixed by GAMMA soon. I will also contact them and tell you their answer if there is any…