@zahrag75
Active 9 months, 4 weeks ago-
bridgetwang replied to the topic Change Images Graph in the forum Sarproz Forum 5 years, 3 months ago
Hi,
it works after I delete the imgs in dataset.txt.
Thank you so much !
Best regards,
Zoe -
bridgetwang replied to the topic use of Graph Analysis and Refinement in the forum Sarproz Forum 5 years, 3 months ago
Thank you very much !
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periz replied to the topic use of Graph Analysis and Refinement in the forum Sarproz Forum 5 years, 3 months ago
With respect to question 3, the “previous points” you pointed to are points selected by e.g. Amplitude dispersion index in APS?
the GAR works with a graph previously processed by the APS. so “previous points” are the points that you import in GAR from the APS module
The points selected with star graph are PS points, and points selecte…
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periz replied to the topic Change Images Graph in the forum Sarproz Forum 5 years, 3 months ago
Hi Zoe,
theoretically, it should work. However, it’s not 100% tested, you might get some problems. If this happens, there is no need to redo all the job. You can just remove the images you want to discard from the dataset.txt file. Then it will work
best -
bridgetwang replied to the topic use of Graph Analysis and Refinement in the forum Sarproz Forum 5 years, 3 months ago
Thank you for your kind reply.
With respect to question 3, the “previous points” you pointed to are points selected by e.g. Amplitude dispersion index in APS?
Also, I have the confusion that, since QPS make use of DS points, shall I comprehend like this: The points selected with star graph are PS points, and points selected by other kind of…[Read more]
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bridgetwang started the topic Change Images Graph in the forum Sarproz Forum 5 years, 3 months ago
Hello,
I have a question about change images graph. After I coregistered my stack , I want to only use connections of which the baseline are smaller than 600m. Just as the attached png shows. Therefore some imgs are not connected in the graph.
I’d like to ask can I continue with APS and MISP? will the following steps only process the connections…[Read more]
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periz replied to the topic use of Graph Analysis and Refinement in the forum Sarproz Forum 5 years, 3 months ago
1. Does GAR always behave better than MISP? And do you recommend to use GAR in most cases?
the standard way APS+MISP is widely used and very robust. when APS+MISP is successful, you don’t need anything else. However, there are cases where it fails. In those cases, GAR can help
2.You mentioned GAR could detect strong movements which exceeds…
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bridgetwang replied to the topic use of Graph Analysis and Refinement in the forum Sarproz Forum 5 years, 3 months ago
Dear Prof. Daniel,
After I read your answers, I tried some experiments with GAR to comprehend better in the past days. I got some more questions here during the experiments:1. Does GAR always behave better than MISP? And do you recommend to use GAR in most cases?
2.You mentioned GAR could detect strong movements which exceeds wavelength, I…[Read more]
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matusbakon replied to the topic east-west and up-down time series in the forum Sarproz Forum 5 years, 3 months ago
Hi,
There’s simple approach for LOS decomposition published here (see Appendix):
https://earth.esa.int/workshops/fringe09/proceedings/papers/s12_3esfa.pdfThe strategy is further described and applied for example here (Section 4. Results, end of page…[Read more]
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serena replied to the topic east-west and up-down time series in the forum Sarproz Forum 5 years, 3 months ago
Hi all,
I don’t know if there is a QGIS tool to compute the up-down and E/W component, let me know if someone knows.
Anyway, it is possible to follow this procedure: 1) starting from geocoded results, resample the measurement points (MPs) using the same grid for both ascending and descending; 2) for each cell, separately for asc and desc, c…[Read more] -
periz replied to the topic east-west and up-down time series in the forum Sarproz Forum 5 years, 3 months ago
At the moment you can project the velocities using the Multi-Sensor module
Here a bit of description https://sarproz.com/manual/multi_sens.html
In the next future we will implement also the projected time series export
Best -
umutcan9821 replied to the topic east-west and up-down time series in the forum Sarproz Forum 5 years, 3 months ago
Hello Dear All,
I have the same question as mentioned by @adugna. IS there any way to analyze the Sentinel-1 data in the east-west direction in Sarproz. If there is, could you share documentation about that. Thanks -
periz replied to the topic use of Graph Analysis and Refinement in the forum Sarproz Forum 5 years, 4 months ago
1. What the “Skip init Mask” means? When should it be checked?
it means selecting all pixels, not loading the initial mask
https://sarproz.com/manual/set_mask.html
https://sarproz.com/manual/carica_maschera.htmlWhat the time series generated in this module is.
a time series object is a file that can be saved either in the APS module or in…[Read more]
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bridgetwang started the topic use of Graph Analysis and Refinement in the forum Sarproz Forum 5 years, 4 months ago
Hi,
When I use the Graph Analysis module as well as read the manual, I come up with the following questions:
1. What the “Skip init Mask” means? When should it be checked?
2. As the NOTE 4 in manual says:”NOTE 4. in this module you can optionally save a time series object. However, for this purpose the atmosphere should have already been…[Read more]
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bridgetwang replied to the topic How to generate mean amplitude image in the forum Sarproz Forum 5 years, 4 months ago
I understand now. Thank you!
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periz replied to the topic How to generate mean amplitude image in the forum Sarproz Forum 5 years, 4 months ago
The case of 2 sensors analysis is an advanced processing mode (as ERS and Envisat combination) that does not apply to your case.
You get only one reflectivity map per dataset.
If you are talking about combining different datasets (as ascending and descending tracks or different sensors) you can combine the geocoded (or orthorectified) maps in…[Read more] -
bridgetwang replied to the topic How to generate mean amplitude image in the forum Sarproz Forum 5 years, 4 months ago
Hi periz,
I have an additional question. As the manual says:“In case of 2 sensors analysis, two different Refl Maps are processed and saved. They are called respectively MeanFirst and MeanSecond”.
In case of different sensors, is it possible to generate only 1 mean amplitude image for the common AOI? How to do it ?
thank you again for your…[Read more]
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periz replied to the topic How to generate mean amplitude image in the forum Sarproz Forum 5 years, 4 months ago
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bridgetwang started the topic How to generate mean amplitude image in the forum Sarproz Forum 5 years, 4 months ago
Dear all,
How can I generate a mean amplitude image after the PS stack images are co-registered?
Thank you for your help!
best regards,
Zoe -
periz started the topic Atmospheric delay mitigation on single (or few) interferograms in the forum Sarproz Forum 5 years, 4 months ago
Dear all,
as mentioned in the Sarproz 2019.0 release post, you can now apply some operations to mitigate the atmospheric delay on single (or few) interferograms.
We published the operations to perform in this tutorial: https://www.sarproz.com/2019-tutorials/
Please read it carefully, in particular the note on the last slide: this exercise helps…[Read more] - Load More