[sekhar]

Thanks. This information is very helpful.

[sekhar]

Hi Daniele,

As per your suggestion, I have processed RS2 images (HH polarization) and got some results. I have observed subsidence over urban areas. Now I want to process same images with VV polarization to see how different would be the results. But when I tried this, slaves are not being extracted. The software shows ‘preparing extracted slaves for viewing’ and at last it shows ‘slaves not extracted’. Could you please help me.

Thanks,
Sekhar

[sekhar]

Hi Daniele,

Thanks for your reply.

How should I apply spatial filtering to interferograms? What options I should choose?

Usually I follow the below procedure:

1. Generate interferograms (flat earth phase and DEM removal, goldstein phase filtering, no unwrapping)
2. APS processing (one-star graph, amplitude stability index, estimate linear trend and height, using external DEM, no weights, inv. residuals)
3. Sparse point processing (similar options as above)

As per your suggestions, unwrapping interferograms at step1 would help me in identifying proper stable pixels. Am I correct?
As the no. of images are less, will my results improve if I choose non-star graph, higher value of amp.stb.index and by using coherence as weights?

Thanks,
Sekhar

[sekhar]

Thanks a lot for clarification..

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