SARPROZ ©

Hi Yuxiao,

I am sorry, I did not mentioned the path where the lasterror is. Hope it is fine now.

Thank you for the answers. I will therefore try to re-download the data in all cases. The distance is not so critical, I was just astonished that for two tracks, the stations are so far away from each other…

When the weather data was not complete…[Read more]

Hi Ivana,

For your second question: since the software is querying one webpage for each date of your image, there are chances that one or more of all the querying are not getting response within the setted time limitation (which is 10 seconds, I think). The reason we set the time limitation for each query is because there is a known bug in Matlab…[Read more]

Hi Ivana,
yes, the your first note is a bug. please give us 1 day to upload the fixed version.
Second note: if you download the weather data at the beginning of the SLC extraction process, yes, the center of the footprint is used. But if you download the data again after working on the crop, the crop center is used. If still the weather station is…[Read more]

As checked together,
probably there were corrupted files in the optical images directory, changing the directory or deleting/moving the downloaded Google Earth files solves the problem.
We take the chance to remind here that GE files are downloaded in this directory: ‘../GIS/GOOGLEEARTH/’
with reference to the current site directory.
In case of…[Read more]

Hi Ivana,
that error happens while loading the image in the background.
The sw searches in the directory that you can change through the “layer” button.
If you change the directory, you should temporarily solve your problem.
To investigate why that happens, you could save the small area (with the same conditions as when the error occurs)
and pass…[Read more]

Yasser,

In Sarproz you can implement almost everything. However, instead of having buttons as “PSI”, “SBAS”, or whatever, you have a series of tools/options that you can combine. Clearly, this requires understanding the operations. It’s more difficult than having predefined buttons, but I think it’s more powerful.

The 2 conditions you mention…[Read more]

Hi Yasser,

original PSI: STAR graph, no weights, no filtering
QPS: non-STAR graph, weights (spatial coherence), filtered phase
Anyway, Sarproz gives you the choice to combine those options and do what you want. You do not need to call what you do “PSI” or “QPS”.

However, you have to be aware of the following: when you choose the option “coher”…[Read more]

Yuxiao,

can you check one image is detected as ascending?
thx

That is the incidence matrix of the images graph
each row is a connection between 2 images
each column represents an image
in a row, 1 and -1 locate which image to take with the plus sign and which one with the minus
interf = im1.*conj(im2) = a1.*exp(j.*ph1).*a2.*exp(-j.*ph2)
read the various QPS papers in the publications section

it should be the same bug reported by Ivana,
so, the solution may already be online

Hi Ivana,

thanks for the feedback, it’s a bug, we are uploading a fix, it will be ready online soon!

Hi Yasser, the reply of a similar answer is here:
http://www.sarproz.com/groups/sarproz-group/forum/topic/doubling-number-of-graph-connection-to-mst-estimation/

if your matrix is small is just because there were no interferograms with coherence higher than the threshold you used…

hi Yasser,
first of all, are you aware that you can put the software in “help mode” and receive some description for each module of the sw?
You can do this with the corresponding flag in the main window.

If you will do it, you will see that you only need to select a geotiff file to load a dem in such format.
The corresponding module and help file…[Read more]

Hello,

this is my second experience with the MISP/time series module, and I am getting an error I did not get for the first time, so maybe I did something wrong, but in the previous version (21-Mar), it still works.

Thank you, Ivana