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periz replied to the topic APS Test lowest coherence master date in the forum Sarproz Forum 5 years, 7 months ago
Sarproz estimates a residual phase that can be attributed to the Master image.
I do not fully understand your meaning. Let’s say you have Image0 as Master and you get a low coherence at Image0. Then you change the reference image and you set Image1 as your Master. In this second case, which one is getting a low coherence value, Image0 or Image1…[Read more] -
periz replied to the topic DEM void in the forum Sarproz Forum 5 years, 7 months ago
yes void/nan values are interpolated
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periz replied to the topic ERS Orbits in the forum Sarproz Forum 5 years, 7 months ago
Your case needs to be debugged. Please arrange installing teamviewer 10 and let’s schedule a remote connection by email
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periz replied to the topic Change detection output on slant range in the forum Sarproz Forum 5 years, 7 months ago
Option A. just check the folder where data/results are saved. if your result is a full matrix, you will find also a jpeg image. E.g. in FITTED you find jpegs of each image. For map changes (in RESULTSCHDETECT), if they have been filtered, most of the area is zero, they are saved as sparse mat files, you can load them in matlab.
Option B. you…[Read more]
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periz replied to the topic Persistent Scatterers steps and interferograms generation in the forum Sarproz Forum 5 years, 8 months ago
It looks like somehow my previous answer to this post went lost…
In your recap you list 3 main steps.
The first 2 are common to all Time-Series approaches.
The third one corresponds to the classic Persistent Scatterers method.
If you want to apply other methods, you might need to process interferograms first.
Also, in some cases you do not use…[Read more] -
periz replied to the topic APS estimation in the forum Sarproz Forum 5 years, 8 months ago
the default value of linear deformation trend is -100 / 100 mm/year.
when you estimate the def trend in the APS processing, you estimate it between close points (the network connections). So, -100 / 100 is already a pretty big range.
in any case, if you have no previous knowledge, the histograms and all plots you get after the processing will help…[Read more] -
periz replied to the topic SBAS processing in the forum Sarproz Forum 5 years, 8 months ago
that’s just a matter of spatial sampling. use the scatter plots module, filter/matrix visualization function to decide how to re-sample plots. you find some examples in the tutorials
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periz replied to the topic Sentinel precise orbit download in the forum Sarproz Forum 5 years, 8 months ago
please read the forum rules
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periz replied to the topic Weather Data News in the forum Sarproz Forum 5 years, 8 months ago
The only weather variable that is actually used in an operational and quantitative way is the temperature. Temperature is used if you decide to estimate the thermal expansion from your phase time series. If you do not estimate the thermal expansion, your results won’t be affected.
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periz replied to the topic CoerSpace not found in the forum Sarproz Forum 5 years, 8 months ago
from your log:
selected reference S: 6154 L: 2181, Temp Coher: 0.98, Sp Coher:
The software cannot tell you the value of the spatial coherence (the coherence map https://sarproz.com/manual/save_coher_map.html) because it is missing.
this is not going to cause any problems.
if you want to see that number or if u want to see the Coherence Map,…[Read more] -
periz replied to the topic Persistent Scatterers steps and interferograms generation in the forum Sarproz Forum 5 years, 8 months ago
phase2height and phase2flat constants are automatically generated when needed.
if you check the log, you will find it written.1.4.2.5 is coregistration refinement and you should NOT run it in normal conditions https://sarproz.com/manual/coreg_refine.html
APS estimation (1.4.8.1) + Sparse Points processing (1.4.8.3) is the standard approach.…[Read more]
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periz replied to the topic coregister two subswath(IW) sentinel-1A images in the forum Sarproz Forum 5 years, 8 months ago
We have already answered you by email.
You have to process the two subswaths separately. And the tutorials are online.
For additional help, please contact the Sarproz people in your area. -
periz replied to the topic Sentinal1 coregistration problem in the forum Sarproz Forum 5 years, 8 months ago
You are right, also Matlab 2017b has the same bug
You have the following options:
A) install an other Matlab version (e.g. 2017a, 2018b or any other)
B) install the Sarproz compiled version
C) keep your current Matlab version but disable the parallel pool when doing the coregistration (it means the coregistration will run on a single CPU core)
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periz replied to the topic reopen a project in the forum Sarproz Forum 5 years, 8 months ago
yess
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periz replied to the topic Amplitud stability good but low cohherence in the forum Sarproz Forum 5 years, 8 months ago
radians per celsius degree
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periz replied to the topic Amplitud stability good but low cohherence in the forum Sarproz Forum 5 years, 8 months ago
the fifth parameter that can be estimated from time series (range by default -.4 .4) is the thermal expansion.
check “estimate” and then analyze the output… -
periz replied to the topic Polar mode (9) error in the forum Sarproz Forum 5 years, 8 months ago
this error happens because you are trying to merge 2 images consecutive in azimuth and a different polar mode (SINGLE/DUAL) is detected.
so, you should find two images (directories) dated 2017-01-30 and in one of them there are two polarization files (like HH and HV) and in an other one just one of them.
probably you deleted the polarization you…[Read more] -
periz replied to the topic APS processing tutorial in the forum Sarproz Forum 5 years, 8 months ago
The infos you bring here are too limited for allowing us giving you processing suggestions.
You will be contacted by people in your region using Sarproz so that you can discuss better with them
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periz replied to the topic Sentinel TOPS threads in the forum Sarproz Forum 5 years, 8 months ago
You are in update mode: a Master is present and you chose to keep it. Since that Master was extracted in a given subswath, you cannot change it.
If you want to change the subswath, you have to remove the previous Master.
How to do it?
Check the “All” flag and then press “Set orbits”. The sw will warn you that it is going to delete the existing…[Read more] -
periz replied to the topic Height and Relative Height from ground in the forum Sarproz Forum 5 years, 8 months ago
can u attach the ext DEM in SAR coordinates? (fourth time)
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