Remove incidence angle effect in Sentinel-1?

[marjanmarbouti]

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A wierd gradient over my result

I did but it has same form.[quote=“marjanmarbouti, post:1, topic:13511, full:true”] Dear all I used TanDEM-X data and made a DEM from them. Steps are listed in below: Interferogram formation unwrapping Phase to height Applying boxcar filter (5 by 5) But if you look at my final result, there is a blue gradient over my filtered phase to height. How can I remove it? [PNG] Cheers [/quote] @falahfakhri I did but same shape.

I remember, you introduced me some references for it (phase ramp) but I only think that maybe it also be because of incidence angle…