Snaphu export with already processed interferograms in GEOTIFF format

Microwave Toolbox Interferometry
1

Hi there,

I have a couple of TSX interferograms that I got from a data provider as already processed interferograms such as the one below.

IF_GEOTIFF
IF_GEOTIFF.png2776×1504 875 KB

The interferograms are in GEOTIFF format and have data values ranging from 0 to 15. I am interested in testing phase unwrapping using Snaphu.

This is why in SNAP I tried to use the Snaphu Export option for just one interferogram in SNAP, but get the message that I need a co-registered stack for this. I therefore tried stacking my interferograms using the Create Stack tool, but am stuck with the following error: Orbit offset method is not support for this product: Ellipsoid.ell2xzy: input values for phi/lambda have to be in radians!

Can anyone help me with this how I could get the export to Snaphu to work?

2

Anyone that can help me with this?

3

hi RedShoe, did you ever get an answer to your question? I get the error “Ellipsoid.ell2xzy: input values for phi/lambda have to be in radians!” error a different way: when attempting coherence estimation for SAR images, that were previously co-registered into a stack
cheers

Screenshot from 2020-09-15 10-22-41_snap

4

no, unfortunately I did not get an answer to my question and currently do not have a solution for this.

5

To coregister preprocessed products like these interferogramsand, select Product Geolocation as initial offset method instead of Orbit. At least this adresses the error you both mention above.

6

Thanks v much @ABruan. Much appreciated! cheers