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ic350450 replied to the topic PSInSAR Result Analysis in the forum Sarproz Forum 3 years, 11 months ago
Hi, I am having a difficult time understanding what to look for when evaluating the APS results and notice that in one of the comments above, correlation was one way of determining if the data looks incorrect. What exactly qualifies as correlation between DEM, vel/displ, integrated height etc.? After processing the data in the APS module, I…[Read more]
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n-ghasemian replied to the topic Reading slc images in matlab in the forum Sarproz Forum 3 years, 11 months ago
Thank you dr Perissin. It solved my problem. Now, I want to do phase unwrapping on the extracted phase values from binary files because the phase values are within the [-pi, pi] interval. How can I do this in Matlab?
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periz replied to the topic Reading slc images in matlab in the forum Sarproz Forum 3 years, 11 months ago
radar data are complex, not real
so, firstly, u cannot read complex data from jpeg files, u have to read the binary files
secondly, u have to tell “leggi” that data are complex
u do this adding a flag, according to this syntax: https://www.sarproz.com/groups/sarproz-group/forum/topic/aps-processing-4/
best -
n-ghasemian started the topic Reading slc images in matlab in the forum Sarproz Forum 3 years, 11 months ago
Hello dr perissin
It may sound a silly question but I want to know how I should read my slc images in matlab using leggi. I have already subseted my data and did co-registration. When I use the leggi function to read the images in the FITTED folder, I get the following error: error using memmapfile/subsref (line 764)
A subscripting operation on…[Read more] -
n-ghasemian replied to the topic Unwrappin APS phase values in the forum Sarproz Forum 3 years, 11 months ago
Thank you for your reply Dr. Perissin. Could you please explain more about the steps to get the raw interferometric phase values (just topographically corrected) using the PSI method in Matlab (my data is the time series of sentinel-1 images). I had already done the PSI method in the compiled version of SARProz, but I am confused about how to…[Read more]
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periz replied to the topic discontinuous phase plot in the forum Sarproz Forum 3 years, 11 months ago
hi, check this about phase jumps: https://www.sarproz.com/groups/sarproz-group/forum/topic/burst-lines-on-interfereograms/#post-5462
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periz replied to the topic burst lines on interfereograms in the forum Sarproz Forum 3 years, 11 months ago
good that you found the solution. however, I do not suggest you to use the ampl xcorr as default. we’ll try to find out a way to use it only in case of failures.
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antig replied to the topic burst lines on interfereograms in the forum Sarproz Forum 3 years, 11 months ago
I solved the problem myself.
the problem was in coregistration.Firstly I used “only orbits” mode for coregistration.
After analyse of Site.log the program had gave warning to that in coregistration has some thing wrong.I tried “Ampl Xcorr” mode for coregistration and it worked match better. No warnings, No Stripe
So in future I use “Ampl…[Read more]
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periz replied to the topic burst lines on interfereograms in the forum Sarproz Forum 3 years, 11 months ago
this is something we need to look at together. let’s plan a conf call via email please
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antig started the topic burst lines on interfereograms in the forum Sarproz Forum 3 years, 11 months ago
I generated an interfereogram from two Sentinel-1 phase images. In the interefereogram (Burst_line.png) has clearly seen stright lines that match bursts stich lines. I would like to fix it. What are the tools in SarProz to fix this kind of problem. I use compiled version.
Thanks for answer
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antig replied to the topic Unwrappin APS phase values in the forum Sarproz Forum 3 years, 11 months ago
You may set in module “Insar params” appropriate settings
Do not filter and multilook interferograms check “Flattening” and “DEM remove”
save settings
genereate interfereograms in module “interferograms protsessing” -
n-ghasemian replied to the topic Unwrappin APS phase values in the forum Sarproz Forum 3 years, 11 months ago
Thank you for your reply.
I need to do topographic correction before extracting phase values. The phases should mostly contain atmospheric and displacement phases. How should I do topographic correction in Matlab?
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periz replied to the topic Unwrappin APS phase values in the forum Sarproz Forum 3 years, 11 months ago
hi,
1. if you want to work on data in the way you describe, you should use matlab.
2. to read data in sarproz (in matlab), you can use the “leggi” function https://www.sarproz.com/groups/sarproz-group/forum/topic/aps-processing-4/
3. using “leggi” you can directly read the original images and perform all what you need without caring about APS…[Read more] -
n-ghasemian started the topic Unwrappin APS phase values in the forum Sarproz Forum 3 years, 11 months ago
Dear Dr. Perissin,
I am using the multi-temporal analysis module of SARProz (compiled version). I need raw phase values (before atmospheric correction) for my research. I assume that atmospheric correction is an unavoidable step in the multi-temporal analysis, and I can not skip it. The strategy that has come to my mind to get raw phase values…[Read more]
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n-ghasemian replied to the topic Sentinel-1 incidence angle in the forum Sarproz Forum 3 years, 11 months ago
Hello everybody,
I read the explanations above about the two functions get_baseline and geo2incang. My problem is that I am using the compiled version of sarproz. Could anyone give me a detialed explanation about how to use these functions to extract the incidence angles for each PS or any other pixel in the compiled version of sarproz?
Thank you
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skyam started the topic discontinuous phase plot in the forum Sarproz Forum 3 years, 11 months ago
Hello
I use of Sarproz to find the ground displacement, to recognize the mechanism of cracking in a badland ground. I downloaded a series of sentinel 1 A data from 2014 to 2016 (7 picture ). I process them with Sarproz. 3 interferogram was ordinary. but, 3 of them was discontinuous.
Also, when I want to make mask points, the software couldn’t find…[Read more] -
periz replied to the topic Exporting products in the forum Sarproz Forum 4 years ago
infos on leggi and scrivi: https://www.sarproz.com/groups/sarproz-group/forum/topic/aps-processing-4/
u are exporting geotiff rgb, which is in uint8 values. to export floating numbers, use geotiff 32: https://sarproz.com/manual/plot_par_mod.html -
skyam joined the group sarproz-group 4 years ago
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ic350450 started the topic Free SLC Data Distributors in the forum Sarproz Forum 4 years, 1 month ago
Hi. I am looking for free SLC data (not registered or co-registered) to download for infrastructure monitoring using PS-InSAR (or other) technique. Who are some data distributors that provide free and quick access to these images to process in SARPROZ? I am particularly interested in the TerraSAR-X, COSMOS, and Sentinel-1 Missions data.
Thank you.
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ic350450 joined the group sarproz-group 4 years, 1 month ago
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