-
periz replied to the topic APS Processing in mountainous areas in the forum Sarproz Forum 5 years, 6 months ago
Each situation is specific, depending on the area, the data, the objective of the analysis.
I am not going to comment on your case, which would require analyzing many things.
A simple general statement: this website contains a decent amount of information about the QPS approach.
I am reporting here a single link, but there are many more:…[Read more] -
volkan replied to the topic APS Processing in mountainous areas in the forum Sarproz Forum 5 years, 6 months ago
https://we.tl/t-RLxluQR8Yg some other files about study is here. Thank you.
-
volkan started the topic APS Processing in mountainous areas in the forum Sarproz Forum 5 years, 6 months ago
Hello,
I want to apply QPS on a mountainous area (attached MasterArea.kml) with 50 S-1 images. I selected dataset, applied preliminary analysis and preliminary geocoding. After all, at the APS processing step, I think something goes wrong.
Although I have tried APS with different values, connections are not coherent. Blue color intensity is…[Read more]
-
minosfylaktos replied to the topic Atmospheric Contribution In Single Interferogram in the forum Sarproz Forum 5 years, 6 months ago
Hello professor
That’s excellent news!
Thank you for the reply once again.
Minos -
periz replied to the topic Atmospheric Contribution In Single Interferogram in the forum Sarproz Forum 5 years, 6 months ago
We are just terminating a major update exactly to allow removing wide atmospheric effects and highlight local landslides. Wait maximum an other couple of weeks.
-
minosfylaktos started the topic Atmospheric Contribution In Single Interferogram in the forum Sarproz Forum 5 years, 6 months ago
Greetings professor Perissin and SARPROZ team.
First and foremost I would like to thank you for your valuable assistance throughout the year.
In Western Greece (Ionian Sea) a substantial number of off-shore (near the coast) earthquakes have occurred of 5 to 5.5 magnitude and several farther from the coast of over 6 magnitude. As we process…[Read more] -
periz replied to the topic Aqcuire the APS removed stack in the forum Sarproz Forum 5 years, 6 months ago
You can plot the estimated APS from the APS module https://sarproz.com/manual/elabora_atmo.html
you can also plot the APS by selecting “choose a real file” in the “plot paramters” module and then browsing to the APS folder https://sarproz.com/manual/plot_par.html
You can also plot an interferogram by removing the estimated APS in the “Single…[Read more] -
periz replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 6 months ago
that’s something we need to check looking at your data then
-
janbu replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 6 months ago
Yes. Not all of them as they are over 3000 (full graph), but they look normal.
-
periz replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 6 months ago
Did you plot the interferograms?
-
janbu replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 6 months ago
Unfortunately, after creating the MT adaptive mask, I did process all the interferograms, selecting the “MT adapt” in the presets of the InSAR Params. Left everything else as default, processed the interferograms and created the coherence map with the results described.
Thanks -
periz replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 6 months ago
That module generates an MT adaptive mask, it does not calculate interferograms.
When you have the adaptive mask, you can use it to filter interferograms.
There is a preset in the InSAR processing options: “multi-temporal apdative”
https://sarproz.com/manual/mt_adaptive_mask.html
https://sarproz.com/manual/insar_params.html
after you get your…[Read more] -
janbu replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 6 months ago
Thank you. That was helpful.
I have proceeded with the MT adaptive filter, created the interferograms and generated the coherence map.
In order to get QPS (using the MT adaptive filter) I am assuming I would select points based on spatial coherence
When plotting the Spatial Coherence I basically get a map of all zero and in fact, no points can be…[Read more] -
periz replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 7 months ago
this is a case where the warning is actually useless, sorry for that
basically the writing function is set to launch a warning when NaNs are inputed (it can be indicative of some issues),
however, in this case NaNs are kept by construction at the borders of the image
you can proceed further, there should be no problem
best -
janbu replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 7 months ago
Noticed that the files weren’t successfully uploaded. Here is the download link:
https://we.tl/t-Ij6K3h4fLq
Thanks -
janbu replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 7 months ago
Thanks.
Attached is the log file and the exportPar if needed.
Cheers -
periz replied to the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 7 months ago
we would need to see the full log to try to understand.
you might even need to flag the debug mode to pinpoint the step where the message is given
best -
janbu started the topic Warning MT Adaptive Mask in the forum Sarproz Forum 5 years, 7 months ago
Hi,
While creating the AD statistical Test in the Adaptive Filter, I get the following warnings:
!!! Warning: NAN in input values:scrivi
may write strange things !!!I am using a FULL graph for the images connection. What can be the reason for this?
Thanks -
uros-djuric replied to the topic Error in coregistration step with ALOS data in the forum Sarproz Forum 5 years, 7 months ago
Thank you for the suggestion, I will try out them.
are you processing the full frame? if not, do it.
I have tried both options, full frame (max extent) and smaller area.
but the question is: what are you using these data for? for sure, no interferometry will be possible
Actually, I was trying to recreate steps from Yuxiao tutorial (Earthquake),…[Read more]
-
periz replied to the topic Error in coregistration step with ALOS data in the forum Sarproz Forum 5 years, 7 months ago
There is not much more to add. Take a bigger reference window, lower the SNR and the correlation thresholds, lower the minimum number of points. are you processing the full frame? if not, do it.
but the question is: what are you using these data for? for sure, no interferometry will be possible.
if you just want to plot the amplitude, you can…[Read more] - Load More