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periz replied to the topic Exporting products in the forum Sarproz Forum 9 years, 2 months ago
in Such a case, I suggest you to read directly the data from the disk.
All parameters are written as matrixes SxL -float- (real or complex depending on the case).
you can use the function leggi included in the pcodes
Data=leggi(FileName,S,L);
FileName is a string containing the name of the file with full path.
S and L are samples and lines.
This…[Read more] -
periz replied to the topic Minimum suggested number of scenes in the forum Sarproz Forum 9 years, 2 months ago
If you have more images, use them.
Using more images makes all statistical parameters more stable, and estimates are much more accurate.
If you are interested only in a given period of time, you will focus your attention there. But you have to use all images you can get.
You can e.g. use the ampl. stab. index estimated on many more images, get the…[Read more] -
periz replied to the topic ERS-2 gyroscope failure in the forum Sarproz Forum 9 years, 2 months ago
What Yuxiao says is partly not correct.
If the Doppler polynomial is precise, Sarproz does the job of resampling the image in the right way.
The problem is that those images highly probably do not have a reliable Doppler polynomial.
If this is the case, you will get lots of problems.
If on the contrary the Doppler polynomial is correct, you can…[Read more] -
periz replied to the topic APS estimation in the forum Sarproz Forum 9 years, 2 months ago
a. UW means unwrapped.
If you check it, the sw will try to read UW interferograms. Then, the multi-temporal processing (estimation of parameters) will work using Least Squares (instead of the maximization of the periodogram).b. Ext DEM means removing the external DEM from time series.
c. the connections (temporal) coherence is calculated as…[Read more]
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periz replied to the topic cumulative displacement isn't accuarte in the forum Sarproz Forum 9 years, 2 months ago
the title of this post is pretty misleading.
insar is relative, but it can still be accurate.
so, deformation trend, time series, cumulative displacement and any other insar product are RELATIVE to a reference point.
unless you know whether the ref. point is stable, your measurements will always be RELATIVE to it.
the true displacement value does…[Read more] -
periz replied to the topic Sparse points selection in the forum Sarproz Forum 9 years, 2 months ago
On the contrary, I believe the net disk is the major problem.
Can you check the network usage?
Or can you simply try to copy the dataset locally? Note that you do not need the SLC folder. So, I believe the rest of the folders should be quite small. -
periz replied to the topic Sparse points selection in the forum Sarproz Forum 9 years, 2 months ago
On the contrary, I believe the net disk is the major problem.
Can you check the network usage?
Or can you simply try to copy the dataset locally? Note that you do not need the SLC folder. So, I believe the rest of the folders should be quite small. -
periz replied to the topic Sparse points selection in the forum Sarproz Forum 9 years, 2 months ago
there is no evident reason for your problem
the file is 2.2MB, less than 1.5e6 points
loading the file in matlab takes a few seconds
I am wondering whether you could have problems affecting matlab and/or windows installation.
or maybe some problems in reading/writing operations: is the file on a local or external disk?
which kind of disk are you…[Read more] -
periz replied to the topic Sparse points selection in the forum Sarproz Forum 9 years, 2 months ago
the mask file is independent from the number of images
it would be nice to know how big is maschera.mat, and which is the size of your dataset (samples and lines).
by the way, which option did you use for mask generation?
are you working with windows? what’s the size of the RAM? -
periz replied to the topic Geocoding in the forum Sarproz Forum 9 years, 2 months ago
given the infos you posted,
I expect the geocoding through external DEM to work well -
periz replied to the topic ALOS-2 import in the forum Sarproz Forum 9 years, 2 months ago
download manually the following file and place it into the same folder of main.exe
http://the.earth.li/~sgtatham/putty/latest/x86/psftp.exe -
periz replied to the topic ALOS-2 import in the forum Sarproz Forum 9 years, 2 months ago
download manually the following file and place it into the same folder of main.exe
http://the.earth.li/~sgtatham/putty/latest/x86/psftp.exe -
periz replied to the topic ALOS-2 import in the forum Sarproz Forum 9 years, 2 months ago
Thanks,
this was a bug (in the compiled version) and it has just been fixed. At this moment you can download the windows compiled version (using the manage version module).
Are you using windows or linux? -
periz replied to the topic ALOS-2 import in the forum Sarproz Forum 9 years, 2 months ago
Thanks,
this was a bug (in the compiled version) and it has just been fixed. At this moment you can download the windows compiled version (using the manage version module).
Are you using windows or linux? -
periz replied to the topic SLC Data Selectin in the forum Sarproz Forum 9 years, 3 months ago
Hi Santiago,
did you read this? http://www.sarproz.com/groups/sarproz-group/forum/topic/data-import-update-with-external-data/
did you download the last version, produced after that discussion? let me know if it solves your issue.
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periz replied to the topic Geocoding in the forum Sarproz Forum 9 years, 3 months ago
As explained many times to you in person,
in this forum, in the manual, tutorials and so on,
the best way to geocode a dataset is precisely manually. In fact, it takes very little to geocode a dataset manually in Sarproz.
You can check it in the many examples in the tutorials.
Why?
1. because there are many sensors for which the orbital…[Read more] -
periz replied to the topic APS processing in the forum Sarproz Forum 9 years, 3 months ago
1) why do you use DS=10 and DL=10?
Leave DL=0.
2) how big is the area, did you check the initial selection of points in the refl map/amp stab map?
18 images is enough for a PS-like analysis, but you have to be very careful because all statistical indexes are affected by the low number of images.
3) why didn’t you keep the Non-Linear weights…[Read more] -
periz replied to the topic Data import (update) with external data in the forum Sarproz Forum 9 years, 3 months ago
the log file is very explicit
u should carefully read the messages from the swafter the
WARNING!!!!! The cube of loaded data contains 26 images, while the current dataset has 31 data
You can load the data again through “Select Area”
which it seems you read,then the sw says:
reading phase-flat coefficients
leggi_flat: at least one…[Read more] -
periz replied to the topic PSInSAR Analysis in the forum Sarproz Forum 9 years, 3 months ago
this result looks much more reasonable.
however, I’d suggest you to use the I.R. APS. read old posts on this topic.I do not understand your question about the amplitude time series.
Your example looks ok and it shows that no evident pattern is visible.
For other cases, please read some papers about temporary PSs (or check the ampl time series…[Read more] -
periz replied to the topic APS processing in the forum Sarproz Forum 9 years, 3 months ago
probably you used wrong weights.
which APS options are you using?
Can you grab the APS module screen and show them to us?
Also, how many images are you processing, from which sensor, which images graph? - Load More