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periz replied to the topic results from different model in APS in the forum Sarproz Forum 3 years, 8 months ago
the smart function is a non parametric model, basically a time filter that smooths residuals. thermal expansion is a function of temperature, which has a smooth component in time (like a sinusoid with 1 year period), but also higher frequencies fluctuations. the smart model would compensate only for the smooth component, while actual temperatures…[Read more]
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periz replied to the topic results from different model in APS in the forum Sarproz Forum 3 years, 8 months ago
Hi,
1. in the APS module the aim is estimating the APS, not the model parameters.
2. the APS is estimated from phase residuals. phase residuals = original phase – model. if the model is wrong, phase residuals will be wrong and the APS will be wrong.
If you have non linear signals, given the 2 above statements, you should either estimate as well as…[Read more] -
periz replied to the topic Main.exe stop working in the forum Sarproz Forum 3 years, 9 months ago
there is some conflict between your operating system/hardware/software configuration and the Matlab MCR. Write to support at sarproz dot come and ask for the Sarproz version compiled with matlab 2017. it might solve your issue
best -
periz replied to the topic Reading interferograms using leggi in the forum Sarproz Forum 3 years, 10 months ago
hi
you are trying to read a geocoded interferogram. geocoded data should be read with proper tools, as gis engines. or otherwise just import the geotif file in any coding environment, if u have geotif libraries.
leggi/scrivi are functions to be used in sarproz with sarproz-format data in SAR coordinates -
periz started the topic First online Sarproz training course in the forum Sarproz Forum 3 years, 10 months ago
Dear all,
finally we are ready to announce the first online Sarproz training course.
The course will last 10 days, 4 hours per day and it will be split into 2 modules (1 week each): basic concepts (radar, SAR, InSAR) and advanced ones (Time Series, A-DinSAR).
The first edition will be given in November. Only a limited number of registrations will…[Read more] -
periz replied to the topic APS Estimate “Test” Results in the forum Sarproz Forum 3 years, 11 months ago
From your attachments, the best result is the linear one.
Few hints that work in general (but might not work in some particular cases):
1. when estimating the APS, better to focus on good scatterers, not affected by thermal or non-linear movement. so, using a linear model only is a good choice. you will include other more complex scatteters later…[Read more] -
periz replied to the topic PSInSAR Result Analysis in the forum Sarproz Forum 3 years, 11 months ago
hi,
to become able to recognize correlated results or to spot possible problematic signals, you need training and experience. difficult to help you much with theoretical statements. we should look at your results together and then we could give you some suggestions.
however, here some general hints:
+ it is correct to check that the peaks of the…[Read more] -
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/
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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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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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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] -
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 -
periz replied to the topic Loading reference point in the APS module using command line mode in the forum Sarproz Forum 4 years, 1 month ago
Hi Dominika,
First of all, at the moment we did not think about letting the user pass a manual reference point in the APS module in the command line mode. The sw will load the RefPoint.mat file (the default way it is usually saved), if it is working in update mode. Otherwise, it’s the sw to choose the default ref point. The reason is because in…[Read more] -
periz replied to the topic ERS data coregistration in the forum Sarproz Forum 4 years, 1 month ago
right
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periz replied to the topic ERS data coregistration in the forum Sarproz Forum 4 years, 1 month ago
there are no errors in the attachment
did you check the Doppler Centroid?
how many images are displayed in the dataset selection window? -
periz replied to the topic Error in main in the forum Sarproz Forum 4 years, 1 month ago
Thank you Vasiliki,
we realized it’s a bug introduced by a newer version of Matlab.
Just fixed it, you can download the latest pcodes version here: https://u.pcloud.link/publink/show?code=XZfXbNkZcq806plARHYTeHYX40qSauYhenuV
Keep the license.key file, it’s going to be the same.
best -
periz replied to the topic ERS data coregistration in the forum Sarproz Forum 4 years, 1 month ago
data have been correctly coregistered
however, it could be that the normal baseline exceeds the bn limit in dataset selection, for this reason, an image is kept out of the dataset, and the total count is less than the number of existing SLCs, for this reason the button is yellow
modify the bn limit in dataset selection
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periz replied to the topic ERS data coregistration in the forum Sarproz Forum 4 years, 1 month ago
generally speaking, u need to include the log file (zip it before attaching it)
in detail, error messages are always more informative and definitive than button colors.
if you did not get any error messages, go ahead.
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periz replied to the topic DSF parameter in the forum Sarproz Forum 4 years, 1 month ago
Please search the forum before posting questions
https://www.sarproz.com/groups/sarproz-group/forum/topic/stratified-aps-estimation/
https://www.sarproz.com/groups/sarproz-group/forum/topic/aps-estimation/ - Load More