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saiyidinal joined the group sarproz-group 4 years, 7 months ago
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antig replied to the topic Orbit heading in the forum Sarproz Forum 4 years, 7 months ago
Thank You Daniele
I understood it now
Agree, that this is weird, but possible, way to illustrate direction. -
periz replied to the topic Orbit heading in the forum Sarproz Forum 4 years, 7 months ago
Hi Antig,
sun-synchronous near-polar orbits are almost parallel to the north-south direction. However, both when going up (ascending) and down (descending) the satellite path is slightly squinted to the west (as the earth rotates). if you draw this on a paper, and if you take the south direction as reference, u will see those angles (that you…[Read more] -
antig started the topic Orbit heading in the forum Sarproz Forum 4 years, 7 months ago
Hi
I have confusion to detect orbit azimuth value. Azimuth is clockwise angle respect from the North
So in SARPROZ SiteDescription.txt I have AcqHeading values. In my mind heading and azimuth should be same values
But values are
DESC_Heading AcqHeading=-9.3537 deg
ASC_heading AcqHeading=-167.9874 deg1) What those direction values discribe?
2)…[Read more] -
hardycross0330 joined the group sarproz-group 4 years, 8 months ago
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edgardocasanova joined the group sarproz-group 4 years, 8 months ago
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bridgetwang replied to the topic Big dataset processing in the forum Sarproz Forum 4 years, 8 months ago
Thank you very much for your rapid and detailed answers!
1.
Cons: if your area is affected by temporal decorrelation/changes, keeping long temporal baselines will decrease the overall coherence.
For the cons you mentioned, I wonder if I individually corigester let’s say 50 images ; On the other hand, I select the same 50 images from the 280…
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periz replied to the topic Big dataset processing in the forum Sarproz Forum 4 years, 8 months ago
when I have a big dataset of 280 images, and want to process it in several subsets, can I coregister all 280 images one time, and then just select less images to form differenct subsets?
you can, it’s your option. Pros: all subsets will share the same master, so, pixels are directly comparable, you can merge/analyze results and have the full…[Read more]
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bridgetwang replied to the topic Big dataset processing in the forum Sarproz Forum 4 years, 8 months ago
Please find the attached error files, thanks a lot !
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bridgetwang started the topic Big dataset processing in the forum Sarproz Forum 4 years, 8 months ago
Hi,
I’d like to ask when I have a big dataset of 280 images, and want to process it in several subsets, can I coregister all 280 images one time, and then just select less images to form differenct subsets?
Is it correct that just keep the images I want in ‘DataSet.txt’ to get the subset combination? I’ve tried by deleting half of the dataset…[Read more]
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pavithra joined the group sarproz-group 4 years, 8 months ago
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periz replied to the topic E-W, U-D decomposition in the forum Sarproz Forum 4 years, 8 months ago
1. check here https://www.sarproz.com/groups/sarproz-group/forum/topic/combine-different-geometries-for-decomposition-of-los-motion/
2. e-w, u-d velocities can be exported from the multisensor module
3. check 1.
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sjhossene replied to the topic E-W, U-D decomposition in the forum Sarproz Forum 4 years, 8 months ago
Hello professor
Thank you for your quick response and accurate.Please let me ask you three questions in this regard
1- How can we calculate time series changes along east -west and vertical velocity for a given point?
2- Is not possible to export e-w velocity and vertical velocity in Multi- Sensor Module or other section of SARPROZ?
3- What…[Read more]
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periz replied to the topic E-W, U-D decomposition in the forum Sarproz Forum 4 years, 9 months ago
Hi,
for some reasons it was not recorded if your dataset was ascending or descending.
We now added the possibility to manually fix this missing info.
Later today or tomorrow update again your sw with the last version.
follow these steps:
1. open the multi-sensor module
2. load the asce and desce TS objects.
3. if the pass is missing (3rd field)…[Read more] -
sjhossene replied to the topic E-W, U-D decomposition in the forum Sarproz Forum 4 years, 9 months ago
Hello professor
Thanks for your quick response.How can I decomposing them?
I downloaded the last version of the software today and did these steps to to estimate the vertical and E-W components.1- Imported TS objects for AS&DS tracks and loaded them in the multi-sensor module. In this step PASS and Track in upper table are empty!? while PASS…[Read more]
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periz replied to the topic E-W, U-D decomposition in the forum Sarproz Forum 4 years, 9 months ago
you are plotting them together, you are not decomposing them
please download the last version of the software and use the AD grid
best -
sjhossene replied to the topic E-W, U-D decomposition in the forum Sarproz Forum 4 years, 9 months ago
Hello professor
Thanks for your quick response.
That is true.
These values are along LOS. I generated TS objects for AS&DS and then loaded them in the multi-sensor module and combined them to estimate the vertical components.Figure A shows combination of Ascending-Descending TS objects.
And Figure B shows combination of Ascending -De…[Read more]
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periz replied to the topic E-W, U-D decomposition in the forum Sarproz Forum 4 years, 9 months ago
Those values are not vertical, they are range displacement, which means, along the LOS, inclined w.r.t. the vertical.
Please read well the basic theory of SAR.
if you generate TS objects, you can load them in the multisensor module and combine them to estimate vertical and horizontal components
range movement can have opposite signs in asce/desce…[Read more] -
sjhossene started the topic E-W, U-D decomposition in the forum Sarproz Forum 4 years, 9 months ago
Hello dear colleagues
one question
The following figures show the deformation evaluation of the 2 salt diapirs in the ascending and descending tracks.
Why are the values inverted in two ascending and descending tracks ?The following figure 2 shows Vertical Velocity Displacement along Ascending and Descending tracks
thanks in advance
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periz replied to the topic Small area geocoding panel in the forum Sarproz Forum 4 years, 9 months ago
At the moment there are no distance learning courses.
We are working to set up a training school in Italy. We should be able to advertise a first course in 2020.
There should be a chance to have a course in Tehran though. We’ll let you know - Load More