the opposite is the case. All interferometry is performed in slant geometry until terrain correction. Applying multi-looking corrects for pixels of different sizes due to the incidence angle and makes them all squared.
yes[quote=“dhill269, post:9, topic:5771”]
Is it incorrect to perform Topographic Phase Removal when processing to Generate DEMs?
yes. This is only if you want to detect subsidence or uplift (differential interferometry) and absolute heights don’t matter. But if you are interested in the topography itself, topographic phase removal must not be applied.
As long as the questions are addressing the same subject I see no need to split.
Thank you very much for this. However, after applying colour ramp, when I try to export in hillshade window, it gives an error that saying the file have one band only. It requires three bands. How did you get over this issue? I know this is not related to here, but it annoyed me a bit.
My study site is located in Canada and the images were acquired in April. My hunch is that the snow cover at that time is what is causing the low coherence. This is probably further exacerbated by the forest cover in much of the area. I will look into using some images from a difference season to compare results.
getting interferometric DEMs in tropical areas is nearly impossible with C-band data because it is scattered ad the canopy and coherence is lost after a few seconds. Even with bistatic data (e.g. TanDEM-X) this is a challenge. So getting a DSM of the canopy is also not possible.
Unless you have P-band data (wavelenghs of ~74 cm) these canopies are not penetratable.