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sekhar started the topic Is heading angle in 'SiteDescription.txt' file +ve w.r.t to geographic north? in the forum Sarproz Forum 6 years, 1 month ago
In the SiteDescription.txt file, I have observed a value for ‘AcqHeading’. I believe this as the heading or azimuth angle of the satellite. If so, is it calculated positive with respect to the geographic north?
For a particular S1 dataset acquired in ascending mode (track 72 over Iran), ESA SNAP software shows platform_heading_angle = -129.6 deg…[Read more] -
sekhar replied to the topic Reflectivity Min and Max values and units in the forum Sarproz Forum 6 years, 11 months ago
Thanks. This information is very helpful.
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sekhar started the topic Reflectivity Min and Max values and units in the forum Sarproz Forum 6 years, 11 months ago
Hello Team,
I came across a parameter ‘Reflectivity’ is Load Mask option. I would like to know what are the max and min values possible for reflectivity. What are its units?
-sekhar
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sekhar replied to the topic PSC interpretation based on Amplitude Stablity Index for RS2 images in the forum Sarproz Forum 7 years, 4 months ago
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…[Read more]
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sekhar replied to the topic PSC interpretation based on Amplitude Stablity Index for RS2 images in the forum Sarproz Forum 7 years, 4 months ago
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…[Read more] -
sekhar started the topic PSC interpretation based on Amplitude Stablity Index for RS2 images in the forum Sarproz Forum 7 years, 4 months ago
Dear Sarproz Team,
I am processing nine RS2 images to study temporal deformation over an area. In APS module > Sparse point selection group, I have selected Amp. Stb. Index > 0.6 and plotted PSC. The figure shows some horizontal and vertical lines along which the PS density is high. I could not see any kind of such pattern in my reflectivity map…[Read more]
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sekhar replied to the topic Amplitude Stability Index in SARproZ in the forum Sarproz Forum 7 years, 4 months ago
Thanks a lot for clarification..
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sekhar started the topic Amplitude Stability Index in SARproZ in the forum Sarproz Forum 7 years, 4 months ago
I have few queries regarding PS point selection criteria in SARproZ.
1. In APS module > Sprase Point Selection Parameter, Amplitude Dispersion is termed as Amplitude Stability. Am I right?
2. How can I relate Amplitude Dispersion (mu/sigma) to Amplitude Stability Index (1-(sigma/mu)). For example, How can I select PSC with Amp. Dispersion <…[Read more] -
sekhar became a registered member 7 years, 4 months ago