SARPROZ ©

This is either related to hardware problem (like e.g. faulty memory) or operating system problem (like e.g. swap space not accessible) or matlab installation problem. Firstly, monitor the resources you are using. Then, you may try to re-install matlab, or the whole system, or run some system/hardware checks…

So, you have ramps both on the estimated height and on the estimated velocity
this is why u see non-zeros velocity.
What I would do is the following:
firstly, check interferograms and see if they are well flattened or if they have ramps themselves. If interferograms have residual orbital ramps, then u can remove them with this function:…[Read more]

Hi Cecilia,
even if you have to analyze a small target (the dam), you need a minimum number of good targets to guarantee a correct and precise coregistration. Since it’s an extra-urban area, and you are using Sentinel, I’d suggest you to increase the area you are processing.
Moreover, I see in the grabbed screen that the sw warns you about…[Read more]

can you generate a higher resolution geocoded reflectivity map and send it to me by email?
it could be correct and the footprint might be shifted.
if this is the case, the reason is that footprints are geocoded using the elevation of a point in the middle of the area. You have steep mountains in your area, thus the footprint could be strongly…[Read more]

Can you be more specific about “you have tried with ext. DEM and it’s not working”? what did you do and what is not working? If you got errors, can you paste zipped lasterror.mat and log files?

both directories have no problems.
the sw searches for the file product.xml. if it is not found, it will give the message you reported above.
be aware that the directory you have to select in sarproz is the one containing (not contained!!) the SLC folder.
“Qarn16” and “qarntest” in your case

hi Bala,
the “force my pixel” option simply means that the software is not checking the probability that the pixel you selected is actually corresponding to a radar target. You can use it in the case of glaciers.
Here the problem is the external DEM. When you say that the height is zero, I assume that there is no SRTM in your area. Is it correct?…[Read more]

narginchk has been introduced in Matlab 2011b
I guess then that you have an older Matlab
for compatibility issues we’ll remove those lines
for the moment you could overtake the problem by using a more recent version of matlab… can you?

can u please post the structure of your directory?
where is the product.xml located precisely?

Hi Pawel,
we could change that piece of code to allow you using that function with your old matlab version.
However, you may find other issues later on. If it is easy for you to upgrade matlab, please do it. If you cannot, let us know and we will make those changes
best

Those are not errors
they are informative messages.
If in your area no SRTM files are available, there is nothing wrong. If SRTM should be available, then the software cannot download them for some reasons. Do it manually and place them in that folder

hi Thibault,
to use Sarproz in matlab, you need the pcodes, which is a set of more than 1,500 files with extension .p, and which comes in a zipped file, pcodes.tar. If you have the main.exe file, instead, it means you have the compiled version that runs independently from Matlab. You cannot call main.exe from within Matlab.
Please send an email…[Read more]

Dear Bridget,
it is always useful to include the full log file in order for us to read more infos and better understand your case.
It seems to me that both issues should belong to an old software version, the last update should have solved them.
In any case, none of them represent a real problem for the success of the processing.
Please check you…[Read more]

is this error happening in both matlab windows or in just one of them?
I am afraid this is a problem of that particular matlab version.
We tested it with versions equal or higher than 2014a and it works

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]