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antsaasma replied to the topic Error in loading Sentinel 1 SLC data in the forum Sarproz Forum 6 years, 7 months ago
We are seeing the same error message. Data is set up following the same procedure that we usually use, although we are on a new machine.
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periz replied to the topic Error in loading Sentinel 1 SLC data in the forum Sarproz Forum 6 years, 7 months ago
hi
the error you report is in fact a small bug, an updated version will soon be uploaded online.
however, in normal conditions you should not get such error. it is not clear to me what you are trying to do.
check well please the instructions in the tutorial. make sure data are in the proper folders and try again.
best -
periz replied to the topic Export to Earth Google Pro in the forum Sarproz Forum 6 years, 7 months ago
Hi Carolina,
you should reduce the size of your attachments (pictures), the maximum allowed should be 2MB.
There are many ways to export results to google, you do not say how you did it.
In your case, you should use the “GeoOut” function in the “filter/matrix visualization” frame in the “scatter plots” module:…[Read more] -
uros-djuric replied to the topic Coherence connection graph – improving results? in the forum Sarproz Forum 6 years, 7 months ago
Dear prof. Perissin,
Thank you for your answer and willingness to help me.
Answer to your questions are following:
1. I have 47 images, Sentinel 1A sensor, IW Beam mode, subswath 2, descending aq. mode
2. Temporal and spatial distribution you can see on attached images and dataset plots & graphs that I believe can be useful to you
3. I am also…[Read more] -
periz replied to the topic Displacement velocity too high? in the forum Sarproz Forum 6 years, 7 months ago
You don’t need to re-coregister the dataset. What you can do is looking at the interferograms to see if there are fringes or other problems. In case of problems you may try to remove those images from the dataset (delete the corresponding lines in the dataset.txt file) and re-coregister them, if you think it is a coregistration problem.
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steffan replied to the topic Displacement velocity too high? in the forum Sarproz Forum 6 years, 7 months ago
So for APS estimation with 130+ images I can reduce amp. stab. thresh to much lower levels? I will try something like .75 and see what happens.
The only coregistration errors I got were S1 Stitching erros, which I inquired in another thread and was told to ignore. I will try coregistering the dataset again and see if there are any errors on those…[Read more]
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periz replied to the topic Sparse Points are offset? in the forum Sarproz Forum 6 years, 7 months ago
As discussed in many places in the forum, this could be caused by an inaccurate GCP.
However, you can still apply a post-processing correction, using geographic correction operations.
You can find them in the time series module (that correction is applied on a single time series object).
Or you can apply them at you whole site, via this module:…[Read more] -
periz replied to the topic Displacement velocity too high? in the forum Sarproz Forum 6 years, 7 months ago
* numbers are always relative to the particular case. E.g. .85 with 35 images is different than .85 with 90 images. With 90 images, you can take this threshold lower. to get an idea, plot the histograms of these parameters in your area of interest
* the bad looking APS you plotted above deserves some closer look. probably you got some…[Read more] -
periz replied to the topic Coherence connection graph – improving results? in the forum Sarproz Forum 6 years, 7 months ago
Hi Uros,
before discussing about possible processing solutions, one has to observe well the data: how many images do you have and their temporal/geometric distribution, what sensor and acquisition mode, how do reflectivity map and amplitude stability index look like. Then, when the case is complex, better to generate also MST interferograms. When…[Read more] -
steffan started the topic Sparse Points are offset? in the forum Sarproz Forum 6 years, 7 months ago
Hello Forum,
Is there any way to better align exported points with Google Earth?
Here is an example:
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steffan replied to the topic Displacement velocity too high? in the forum Sarproz Forum 6 years, 7 months ago
Hello friends,
I followed the tutorial by Mr. Yuxiao very closely. Results seem much better than before, but there are still a couple of anomalies.
First, the resulting points from 0.85 thresh amp. stab:
Coherence Before:
Graph Coherence;
Parameters Plot…
Heights:
Displacement:
Coherence after weighting (0.8; 0.95)
Coherence…[Read more]
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uros-djuric started the topic Coherence connection graph – improving results? in the forum Sarproz Forum 6 years, 7 months ago
Hello everyone,
I would like to ask what parameters are crucial for coherence connection estimation? How to improve coh. connection in case of low results?
I am constantly getting low coh. connection values, and most of connections are blue, while only on urbanized part of area of interest my connections are high.
Below you can see the coh.…[Read more]
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periz replied to the topic Displacement velocity too high? in the forum Sarproz Forum 6 years, 7 months ago
Hi Steffan,
sorry for the late answer. We need to find some time to check your data. We need to see things from the beginning.
For the moment, I can suggest you to check this simple exercise https://www.sarproz.com/yuxiaos-tutorials/
(the last tutorial). It gives you an idea of the results you should see step by step
best -
steffan replied to the topic Displacement velocity too high? in the forum Sarproz Forum 6 years, 7 months ago
After reprocessing the point of interest with 135 images, the results are the same (extremes of displacement).
Here are examples:
Here are APS parameters:
Maybe this time series can provide some insight:
Thank you!
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steffan replied to the topic S1_STITCHING error in the forum Sarproz Forum 6 years, 7 months ago
Thank you Yuxiao
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Yuxiao replied to the topic S1_STITCHING error in the forum Sarproz Forum 6 years, 7 months ago
Yes you can ignore.
The warning message there should be quite self-explanatory.
yuxiao
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steffan replied to the topic Displacement velocity too high? in the forum Sarproz Forum 6 years, 7 months ago
Dear periz,
I am reprocessing the dataset with 135 images (from 60 previous), I will post the results soon.
Thank you
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steffan started the topic S1_STITCHING error in the forum Sarproz Forum 6 years, 7 months ago
Hello Forum,
I am processing 135 Sentinel 1 images. During Slave extraction I get the following error on many images:
S1_STITCHING(): YOUR FIRST 6 LINES FOR INTERFs INCLUDING IMAGE 20170201 WILL BE TOTALLY NOISY DUE TO A FAIL IN ALIGNMENT!
Extract Slave from a different look: date 20170201…Done.Is this a problem or can I ignore it?
Thank you
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Yuxiao replied to the topic Sentinel-1A slave images extraction in the forum Sarproz Forum 6 years, 7 months ago
This bug is solved.
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uros-djuric replied to the topic Sentinel-1A slave images extraction in the forum Sarproz Forum 6 years, 7 months ago
Hello,
I have downloaded the newest version of Sarproz, and I am working on 48 images of Sentinel 1a data.
Frist, I would like to say that in previous version of SarPROZ I didn’t have this issue and everything worked perfectly (same datasets).During Slaves extraction, I receive this error “Image N does not cover your AOI! Check footprints of N…[Read more]
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