Hyp3 Interferogram Stitching

[Arcyzr]

Jira: https://asfdaac.atlassian.net/browse/TOOL-2048

Dear ASF Developers,

I am a data user who is performing time-series InSAR processing using Hyp3 data. During my data processing, I have encountered some issues. A specific study area of mine falls between two images from the same orbit that are connected above and below. Therefore, I would like to stitch together the Hyp3 interferograms produced by ASF.

I have not found any methods for such stitching in the current available documentation. Could you kindly advise whether there is a function provided for this purpose when ASF generates Hyp3 data?

Your guidance would be highly appreciated. Thank you for your time.

Best regards,
Wanli Yang

[cirrusasf]

Hi Wanli,

The HyP3 does not provide unwrapped-phase crossing scenes. Users can work the stitching themselves. I would recommend that you can get wrapped-phase images from HyP3, stitch them, then do the unwrap process with snaphu (http://web.stanford.edu/group/radar/softwareandlinks/sw/snaphu/). Please note that you shouldn't directly stitch unwrapped-phase images. Another open source GMTSAR (https://topex.ucsd.edu/gmtsar/) can be used to do stitch and calculate the unwrapped phase crossing over scenes. Hope this answer helps you.

Jiang