SARPROZ ©

–“why are you surprised that the result is within the imposed range?”

Based on the velocity results and “linear trend” threshold setting, I found the velocity result is within the range of “linear trend”. In fact, the threshold of “linear trend” was estimated by person,it’s just a estimated value, so it wasn’t correct,and it didn’t…[Read more]

why are you surprised that the result is within the imposed range?
the range is used exactly for the purpose to limit the result within a minimum and a maximum.
the result can be different in case of noisy data (the algorithm has a random component, and random data can lead to random results)

anyway, never use a-symmetric ranges in the APS…[Read more]

Hi Amir,

this means that you are missing the matlab parallel processing toolbox.
You should contact your IT person for that. I can anyway send you the compiled version and you can keep both versions on your computer (the license is the same). You can use the compiled one for running the operations requiring functions not installed in your matlab…[Read more]

Your matlab version is not supporting the function needed for the update

yeah, I use the pcodes version compiled for linux.

hi Shimin,

you should reduce the jpg image and paste it here again, so that we can see the error. Also, if you got a lasterror.mat include it together with the log (zip them before attaching them here).
In the meanwhile, to get an update write to support at sarproz dot com, specifying whether you are using the pcodes version, compiled for win or…[Read more]

The coregistration refinement may be needed if you are working with high resolution, high normal baselines, important topography.
We had clear evidence of that with Cosmo datasets in mountainous areas.
Your errors look a bit strange and in fact may be due to the 2015b version of matlab
d

Hi Dan,
I’ll have to look into re-ordering the SLCs. In the meantime I’m running the refinement with GAMMA and I’ll then import the files again. But do you think this is a good approach if I ultimately want to run PS?
I have attached the zipped up error files.
Best,
Jackie

Hi Jackie,

unfortunately at this moment the coregistration refinement works only with images coregistered by Sarproz. The reason is that the algorithm is using the results of the first coregistration.
Would that be possible for you to access SLC images? it would also be a chance to compare the result with yours.
We could also implement a…[Read more]

Hi Dear Ivana,

Thanks for the testing, this is indeed a bug and I’ve fixed it.

I’ll submit the fixed code for sarproz.

Between now and the publishing of new version, as a temporarily work around, this bug can generally be avoided by not selecting areas close to the border of Sentinel image.

Also in your log I see that you have sentinel…[Read more]

Hello,

I am attaching an error I encountered more times (but sometimes not; in different areas), I am processing an area close to image border; what is the problem here and how shall I avoid it?

If I understand it well, it concerns the number of bursts…?

Thank you, Ivana

Sorry, following the next site I fixed the problem.

Thank you for the advice!! I followed your instruction.

Tannia

Hi Ivana,

you raised a good point. We used to store the normalization constants many years ago, but we did not implement it when we included the SLC module. The image amplitude is normalized to have an average value equal to 1. You could further equalize the images using only stable targets. But the matter of fact is that at this moment the…[Read more]