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bridgetwang replied to the topic Big dataset processing in the forum Sarproz Forum 3 years, 7 months ago
Now it is totally clear to me. I appreciated all of your answers, thank you!
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periz replied to the topic in the forum Big dataset processing 3 years, 7 months ago
no.
ASI and reflectivity maps are calculated using the set of images of your dataset, independently from the images graph (which is something related to operations involving pairs of images)
this means, if you change the set of images, you have to reprocess ASI and REFL maps -
bridgetwang replied to the topic in the forum Big dataset processing 3 years, 7 months ago
Thank you so much for the prompt reply. Now I understand where the problem is.
So does it also mean that, everytime if I change the graph e.g. from STAR to Full graph or MST, I should re-process the ASI for the current graph?
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periz replied to the topic in the forum Big dataset processing 3 years, 7 months ago
if you select your points based e.g. on the amplitude stability index == ASI > 0.75 and you get the same amount of points in subsets A, B and C, the explanation is only one: ASI is the same in the 3 datasets.
Instead, for each subset you have to re-process the ASI so that you will get 3 quantities: ASI_A, ASI_B and ASI_C
best -
bridgetwang replied to the topic Big dataset processing in the forum Sarproz Forum 3 years, 7 months ago
Dear Prof. Daniele,
I had asked in the forum that I coregistered and processed a long time series dataset including 280 images, and then I changed the “Dataset.txt” to process different subsets individually in one project. Here is the question link:Big dataset processing
The 3 subset is 2010-2012,2012-2014,2014-2016, and the whole dataset is fr…[Read more]
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vinphe replied to the topic Incidence angle – SARPROZ compiled version in the forum Sarproz Forum 3 years, 7 months ago
Hi,
Thank you for your reply. We will have to analyze large areas, so a per pixel value is of interest. Is it possible to have a value at the 4 corners of the area of interest to interpolate the incidence angle per pixel instead?
Best -
bridgetwang replied to the topic Temporary PSI in the forum Sarproz Forum 3 years, 7 months ago
Thank you very much for your answer as quick as ever! I’ll follow the tutorial to do a test.
Sure, I’d like to take the course when our financial support could afford it. 🙂 -
periz replied to the topic Incidence angle – SARPROZ compiled version in the forum Sarproz Forum 3 years, 7 months ago
Hi,
at the moment we do not have an option to generate a matrix of incidence angle values for all pixels, accessible from the compiled version. You can get it only using the pcodes, because it’s a low-level function. However, do you really need this value for all pixels? if you are not analyzing a huge area, probably an average value is enough. To…[Read more] -
periz replied to the topic Temporary PSI in the forum Sarproz Forum 3 years, 7 months ago
Hi,
here you can see how to process and check amplitude time series (part III): https://www.sarproz.com/utp-course-2012/
To use the result of the amplitude time series processing in the phase time series analysis, you just need to use the amplitude model as weight.
For a more complete discussion and explanation, the best way would be taking a…[Read more] -
vinphe started the topic Incidence angle – SARPROZ compiled version in the forum Sarproz Forum 3 years, 7 months ago
Hello everyone,
I am interested in getting the value of the incidence angle per pixel. I saw on the forum a way of doing it with the MATLAB version of SARPROZ, however I am using the compiled version. How could I get this information using the compiled version of SARPROZ?
I intend to use the incidence angle per pixel for post-processing…[Read more]
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vinphe joined the group sarproz-group 3 years, 7 months ago
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bridgetwang started the topic Temporary PSI in the forum Sarproz Forum 3 years, 7 months ago
Dear Daniele,
I’m processing a long time series of CSK urban data spanning more than 5 years. I’d like to try to implement the “Temporary PSI” method in SARPROZ to get estimation of temporary targets sunch as new constructions or collapse.
Could you please give me a guidence on how to implement this method in SARPROZ?
Also, I’ve read your paper…[Read more] -
periz replied to the topic Using external DEM source coregistration in the forum Sarproz Forum 3 years, 7 months ago
Hi,
generally speaking, read carefully this: https://sarproz.com/manual/Sarproz_errors_management.html
In your case, given this message: “get_master_pts: previous files available. Exiting. ”
start over the whole process again (don’t update the site, re-extract the master image)
best -
yvhout started the topic Using external DEM source coregistration in the forum Sarproz Forum 3 years, 7 months ago
Hi,
I want to use an external DEM, and I selected it at the DEM source at coregistration parameters, but when I try to run coregistration I get the error I listed below this message.
I have tried 2 DEM .tif files:
– High Mountain Asia from NSIDC
– AW3D30 from JAXA
and they definitely cover the selected area.Coordinates System:
Horizontal…[Read more] -
crgos joined the group sarproz-group 3 years, 8 months ago
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amirolinxa2 joined the group sarproz-group 3 years, 8 months ago
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dumindarw replied to the topic Coregistartion in the forum Sarproz Forum 3 years, 8 months ago
Dear Professor Periz
Thank you for the clarification, yes I am using an old version would love to have the new version to continue my experiments, actually I am working with 35 Sentinel images both in ascending and descending respectively over the central mountain regions of Sri Lanka, for the topography monitoring due to ongoing series of…[Read more]
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periz replied to the topic sentinel 1, problems with geocoding timeseries in the forum Sarproz Forum 3 years, 8 months ago
hi,
here some answers to your points
1) if you use the non-parametric approach (e.g. smart=5), the software does not estimate a linear trend. what you can export instead is the cumulative displacement
2) sorry, don’t understand your question
3) ‘External DEM and synthetic amplitude in SAR coordinates’ is a function to generate those products. you…[Read more] -
periz replied to the topic Coregistartion in the forum Sarproz Forum 3 years, 8 months ago
Hi,
1. you have an old software version, if you want you can get a more recent one with the manage version module
2. in some cases that might still be under investigation sentinel interferograms can be affected by phase jumps along the range direction between two adjacent bursts in azimuth. the message you got warns you of such a possible case
best -
dumindarw started the topic Coregistartion in the forum Sarproz Forum 3 years, 8 months ago
Hello Members
During the Coregistration process using Sentinel 1 data I have encountered the following warning
WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!!
There is something Sketchy regarding slave img 20170524!!!
You will likely to see a PHASE JUMP in ANY interferogram involving this img!
<BE AWARE> <BE AWARE> <BE…[Read more] - Load More