okay will do and let you know
Actually I am wondering about anything wrong on the interferograms.
So after @falahfakhri, please check the interferograms as it is suspicious the fact that n_trial_wrap=NaN
Let us know
@mdelgadoā¦ At present i am running Stamps(2,2) as @falahfakhri saidā¦ In this patch 1 is see a value
n_trial_wraps=0.141453
But not sure what would happen for the next patches, i have 4 patches and the patch 1 is running nowā¦ will let you know of any error if it comesā¦
Thank you @mdelgado
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Iāve done what you said.
But when Iām going to make StaMPS export another error is showing.
I donāt understand why this is showing, Iāve done topographic-phase removal. This should include orthorectified Lat/Lon.
I need to find the deformation of my required area. Iāve done the following steps for processing Alos palsar data as suggested by ABraun:
1. Coregistration(1master, 4slaves)
2. Deskewing
- Interferogram formation
- Terrain Correction
Up to this no problem. But I cant make the StaMPS export for the rest processing.
Next I want to apply PSI, then unwrapped with SNAPHU, and finally apply SBAS to find the deformation.
could you please help?
Could please select DEM HGT 1Sec auto download,
And as I mentioned before four images are too low number for PSI technique, Also skip step 4. Terrain correction, it is not needed, Also there is no need to apply topographic phase removal two times, because you already have checked the box subtract topographic phase in the step of interfergram formation.
in previous post , a good training, have a look at it please.
What is mentioned after terrain correction, needs from you some reading, about the Interferometric techniques
Dear sir, Sorry to bother you again. And thank you very much for replying me. Iāve select DEM HGT 1Sec while interfergram making. If I do not terrian corrected the interferogram and just try to make StaMPS export, the following error is showing:
If I do terrian correction then following error is showing:
What should I do now? And the area Iāve chosen for finding interferogram, there are only 11 images with same frame and path. Will it be worked with 11images? If I take 11 images, should I make 1 master and 10 slaves for co-registration?
Iām really very sorry to bother you. Iām a beginner in this sector. Iāve read the previous post of you and ALOS PALSAR processing this post too. It will be very kind of you, if you help me.
sometimes the order of the two products makes a difference. Try moving the second one to the top and switch to the next tab.
@falahfakhri Will go through thisā¦
And it did run successfullyā¦while i gave 0.42 2 2 50 200ā¦ it is going wellā¦
Thank you so muchā¦
No need to apologize, the goal of this GREAT STEP FORUM, form the first time it is initiated, is to support the researchers from around the world by ESA, and also the members of this STEP FORUM, try up their best to help each otherā¦ this is my understanding 
The idea of the PSI, is to find a coherent point scatterer for long term, during the processing youāll find that some pairs should be removed because of many related problems such as jump phases, or many others, thatās why one reason is to have many images as much as we can,
Please take a look at this,
Persistent Scatterer Interferometry: A review
In your case if there are no more images than 11, never mind, you could try, by selecting one as master and the other 10 as slaves, the suitable master could be selected by applying InSAR overview, to check up which one of the 11 is the best master.
Also now I found a very good summary, it is done by our colleague @ABraun you could go through it
Iām so glad of your successful, the main solution of this error is @mdelgado he was the first provider of this solution. And I was the first finder of this error 
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@mdelgado Thank you for your contributionā¦ I carried out the stamps(2,2) process successfullyā¦
Ha haā¦ great that you spotted this error way aheadā¦@falahfakhri
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Well, if I got actually the solution means that I got this error before. 
Othewise I could not anticipate it. But yes, you were the first one with which I have shared my solution. 
Anyway, I am glad to contribute with my little help.
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I am thankful to both @falahfakhri and @mdelgadoā¦ Without the suggestions of your two i wudnt have been able to come out with this processingā¦
I am glad you found this error earlier and sorted out in priorā¦
am gratefull for your timeā¦
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this is my final result which i obtainedā¦
May i know how to infer things from thisā¦ Any material available?
This is not the best plot to infer ā¦
try with ps_plot(āv-dā,1) or ps_plot(āv-doā,1) depending of your processing options and you will see the mean LOS deformation velocity plot, which is much more comprehensive.
Still, my first suggestion is to increase the dataset, as 10 is a bit too low for inferring anything, as you could be seeing seasonal effects and so onā¦only with larger dataset you are able to see a evolution of the phase in time.
then, you can try ps_plot(āv-dā,1,ātsā) to see any time series of a selected point (you select the point by doing click on the image which opens)
You can check the StaMPS manual to see options and more.
Good luck!
this is the result from ps_plot(āu-dmā)
will it do something in inferringā¦
I went through the plots given in the manual and tried it outā¦
this was my first trialā¦ Will add on more ifgs soon and try it out
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@thho
I carried out the steps as you prescribed in your manual and successfully completed the processā¦
I am about to try out Stamps-visualizer and i am reading that threadā¦
At this moment, i just want to thank you heartly for the support and guidance you provided meā¦
Thank you so much @thho
@ABraun sir,
Product canāt be altered as if I altered them, SNAP is showing me ā1st product should be co-registered SLC product and 2nd product is the interferogramā.
Is it a problem that Iāve subset the images before co-registered as If I take the full image storage problem is occurred? Thats why Iāve subset the required area with same co-ordinate for all images. Then I co-register the images.
Thank you sir.