Coregistration blank results

[AllenTsai]

Hi all,

I try to coregister different polarization channels of the same COSMO-SkyMed image using the Radar/Coregistration/Coregistration, yet there will always be one layer showing only a tiny square of information (as the second panel of the attached figure shown) in every re-do. Any suggestions or method to avoid this problem?

P.S. I am using the latest version of SNAP. BTW, this error sometimes occurs when I coregister other SAR sensors’ images (coregistrating the same path/frame’s same sensor’s image).

Thanks
Allen

[AllenTsai]

Even by setting the Initial Offset Method to “Product Geolocation,” the same issue remains (i.e., one band only shows a small square).
@ABraun do you have some suggestions?