SARPROZ ©

are you opening two matlab windows and running a sarproz instance in each of them?

Launch it twice.
But make sure the two instances are not using the same CPU cores, or as a result they will run slower. You may want to assign half number of CPU cores to each instance. Moreover, one of the bottle necks of InSAR is the quantity of data: if you don’t have very fast disks, attempting to read data from multiple disk locations at the…[Read more]

The NL weights are used to decide which coherence values are good and which are not good.
In fact, the value of the coherence is not universal. The value depends on the dataset that you are using (number of images and distribution of baselines) and on the parameters that you estimated (as deformation model, height and so on).
The sw runs a test to…[Read more]

there is some error relative to the coordinates
before the error you report here an other one happened, it would be useful to look into it
also, we may need to check the contents of the hand_slc_module structure that you can get by typing “fast” at the command prompt

All satellite data come in a specific format.
The format is not only about the file containing the data.
Format may include also subdirectories and additional meta data.
You should never touch such structure and never separate original files.
In particular Sentinel data are organized in directories whose name terminates with .SAFE
and they have…[Read more]

Hi Benattou,
looks like that your code is somehow corrupted
try please to update your software version using the manage version module
or otherwise replace your code with the original one you received
let us know if that solves your issue
(by the way, from your log it looks like you have ascending a descending images in the same dataset, please…[Read more]

send by email the log file and errors if any

At the moment we don’t have yet a module for pixel tracking, we are still developing it.
However, the functionality is already there, and, with a bit of patience, you can already use it.
In fact, the software is storing the shifts estimated from the coregistration, and you can load them and display/output the shifts.
Some elements needed to do…[Read more]

there are many types of masks
sparse points masks:
http://sarproz.com/manual/set_mask.html
continuous masks
http://sarproz.com/manual/kml2mask.html
more complex pixel selections (“save selection” below)
http://sarproz.com/manual/xplot.html
and you can load any custom file you create in any module of the software with “choose a real file” in the…[Read more]

1. if you process the STAR graph and you do not use the coherence as weight, there is no need to generate interferograms (the sw uses unfiltered phase)
2. if you have few images, a possibility to make the system more stable is processing a non-star graph to add redundant interferograms. if you do so, you may want to filter interferograms and use…[Read more]

Hi Sekhar,
yes, the lines appear because the image is subdivided into patches. however, they look like lines in the picture that you attached, but in fact it’s just an optical effect showing the higher density close to patch borders. if you zoom in, you will see that they still pick up real local maxima, and pixels are not aligned, so, you do not…[Read more]

Updates can be installed through this interface http://sarproz.com/manual/manage_version.html
if you encountered errors, please send us lasterror and log files
if you upload them here, zip them first

Hi Sekhar,
in Sarproz parameters you find both “ampl. stab. index 1-sigma/mu”=ASI and “ampl. stab mu/sigma”=SA
what you call Ampl. Dispersion is DA=sigma/mu=1/SA
ASI=1-1/SA=1-DA
since in the APS module points over the threshold are selected, then you have to use ASI > .75
otherwise, you can apply more complex conditions (>< || && on multiple…[Read more]

Hi Sekhar,
in Sarproz parameters you find both “ampl. stab. index 1-sigma/mu”=ASI and “ampl. stab mu/sigma”=SA
what you call Ampl. Dispersion is DA=sigma/mu=1/SA
ASI=1-1/SA=1-DA
since in the APS module points over the threshold are selected, then you have to use ASI > .75
otherwise, you can apply more complex conditions (>< || && on multiple…[Read more]

Hi Sekhar,
in Sarproz parameters you find both “ampl. stab. index 1-sigma/mu”=ASI and “ampl. stab mu/sigma”=SA
what you call Ampl. Dispersion is DA=sigma/mu=1/SA
ASI=1-1/SA=1-DA
since in the APS module points over the threshold are selected, then you have to use ASI > .75
otherwise, you can apply more complex conditions (>< || && on multiple…[Read more]

Hi Sekhar,
in Sarproz parameters you find both “ampl. stab. index 1-sigma/mu”=ASI and “ampl. stab mu/sigma”=SA
what you call Ampl. Dispersion is DA=sigma/mu=1/SA
ASI=1-1/SA=1-DA
since in the APS module points over the threshold are selected, then you have to use ASI > .75
otherwise, you can apply more complex conditions (>< || && on multiple…[Read more]

hi Ivana,
InSAR is by definition a differential operation, so, constant terms have no impacts.
What counts in the temperature is its variation, not its average.
Also standard deviation and variance are independent from the mean value.

Hi Ivana,
baselines are saved in the DataSet.txt file. However, it’s just an indicative number, since the baselines changes within the analyzed area. In the processing, such value is calculated from the orbital information.
If you use Matlab you can also load the baselines values using the command “fast”. They are stored together with other infos…[Read more]