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periz replied to the topic APS Test lowest coherence master date in the forum Sarproz Forum 5 years, 11 months ago
Sarproz estimates a residual phase that can be attributed to the Master image.
I do not fully understand your meaning. Let’s say you have Image0 as Master and you get a low coherence at Image0. Then you change the reference image and you set Image1 as your Master. In this second case, which one is getting a low coherence value, Image0 or Image1…[Read more] -
julinor started the topic Meaning of the csv results in the forum Sarproz Forum 5 years, 11 months ago
when I output my PS results with csv format, the results shows two displacement imformation with date shows in the picture, what does these mean? which one is the real displacement? Thanks!
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janbu started the topic APS Test lowest coherence master date in the forum Sarproz Forum 5 years, 11 months ago
Hi,
I am processing a data set 0f 24 Sentinel images with a Star Graph for the image combination.
APS results show the lowest value (near to zero) at the date of the master, which I found weird. Changing the date of the master, I still get the lowest value at the master date.
What can be a reason for that?
The image is attached. I can provide…[Read more] -
minosfylaktos replied to the topic ERS Orbits in the forum Sarproz Forum 5 years, 11 months ago
Thank you professor. I will do so as soon as possible.
Best regards.
Minos -
periz replied to the topic DEM void in the forum Sarproz Forum 5 years, 11 months ago
yes void/nan values are interpolated
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periz replied to the topic ERS Orbits in the forum Sarproz Forum 5 years, 11 months ago
Your case needs to be debugged. Please arrange installing teamviewer 10 and let’s schedule a remote connection by email
best -
minosfylaktos started the topic ERS Orbits in the forum Sarproz Forum 5 years, 11 months ago
Hello professor.
Currently I am working on the Evros Delta with ERS images. Because of my little knowledge about PRC (ERS orbit files), I was looking for posts in this forum about it. I found that we have to download the files manually from ESA On-the-fly. Which I did and went well.
Here is the post I’ve read about ERS/ENVISAT…[Read more] -
antig started the topic DEM void in the forum Sarproz Forum 5 years, 11 months ago
Program warns that there are voids in used ext.dem model (NaN values). Does it interpolate then Nan values or do nothing?
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mahin joined the group sarproz-group 5 years, 11 months ago
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periz replied to the topic Change detection output on slant range in the forum Sarproz Forum 5 years, 11 months ago
Option A. just check the folder where data/results are saved. if your result is a full matrix, you will find also a jpeg image. E.g. in FITTED you find jpegs of each image. For map changes (in RESULTSCHDETECT), if they have been filtered, most of the area is zero, they are saved as sparse mat files, you can load them in matlab.
Option B. you…[Read more]
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chengwei started the topic Change detection output on slant range in the forum Sarproz Forum 5 years, 11 months ago
Hi All,
I’m working on change detection tool recently
I want to export my change detection outcome under slant range, but there are only geocoding and orthorectify two options in change detection tool Data export section.
Anyone know that is it possible to do this?Many thanks,
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periz replied to the topic Persistent Scatterers steps and interferograms generation in the forum Sarproz Forum 5 years, 11 months ago
It looks like somehow my previous answer to this post went lost…
In your recap you list 3 main steps.
The first 2 are common to all Time-Series approaches.
The third one corresponds to the classic Persistent Scatterers method.
If you want to apply other methods, you might need to process interferograms first.
Also, in some cases you do not use…[Read more] -
hamidbanan replied to the topic APS estimation in the forum Sarproz Forum 5 years, 11 months ago
Dear Dr periz
thank you for quick reply. In InSAR analysis of 2 coherent images (with 1 year interval), I realized that the maximum range of subsidence is 17 cm in bowl center (Just as a theory), so is it logical to put (0 , -170) or (170 , -170) for linear trend? Also I found there is gap between the results of sentinel-InSAR analysis in SARPROZ…[Read more] -
periz replied to the topic APS estimation in the forum Sarproz Forum 5 years, 11 months ago
the default value of linear deformation trend is -100 / 100 mm/year.
when you estimate the def trend in the APS processing, you estimate it between close points (the network connections). So, -100 / 100 is already a pretty big range.
in any case, if you have no previous knowledge, the histograms and all plots you get after the processing will help…[Read more] -
hamidbanan replied to the topic APS estimation in the forum Sarproz Forum 5 years, 11 months ago
Dear Prof.Daniele
I have a question about APS estimation. Actually I have no extra data or no idea about the amount of subsidence or deformation size. So in processing parameters, What strategy should be followed about numeric value of the range in linear trend? The default value (-1.1) seems to be wrong in my study area.
regards
Hamid -
periz replied to the topic SBAS processing in the forum Sarproz Forum 5 years, 12 months ago
that’s just a matter of spatial sampling. use the scatter plots module, filter/matrix visualization function to decide how to re-sample plots. you find some examples in the tutorials
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hamidbanan replied to the topic SBAS processing in the forum Sarproz Forum 5 years, 12 months ago
In the time series analysis, if we want to create continuous maps instead of PS points (like SBAS results in StaMPS) What steps should we take?
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antig replied to the topic Sentinel precise orbit download in the forum Sarproz Forum 5 years, 12 months ago
I don’t understand. Where is no such warning discribed in forum (I searched). And no lasterror.mat also because this is a warning not error
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periz replied to the topic Sentinel precise orbit download in the forum Sarproz Forum 5 years, 12 months ago
please read the forum rules
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antig started the topic Sentinel precise orbit download in the forum Sarproz Forum 5 years, 12 months ago
Hi and Happy New Year
If SarPROZ download Sentiel 1 precise orbit then I got warning
[> In deserialize at 9In remoteParallelFunction at 37]
Precise Orbit is used for S1A and 2016/08/20
Warning: Calling STRUCT on an object prevents the object from hiding its implementation details and should thus be avoided. Use DISP or DISPLAY to see…[Read more]
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