SARPROZ ©

For anyone having the same problem, selecting an appropriate manual GCP seems to fix the problem. Roads and other landscape features are properly aligned now. I used a floodlight from a football field and it seems to do the job just fine.

The all zero error seems to be due to ocean, as the satellite data does cover some coastal area.

Thanks for the help.

Thank you very much for help 🙂
I create in the DEM program according to the following steps:
1. Loading data – Select Dataset,
2. Coregistration – SLC Data Processing
3. Performing processes in the Site Processing window marked in red
4.Small Area Processing:
– Select Area
-InSAR Analysis: execution flattening, DEM removal, filtering…[Read more]

1. if DemSynt is not found it means you have to generate it via “external DEM and synthetic amplitude in SAR coordinates” (this could be the reason for wrong georeferencing)
2. if an SRTM tile is all zeros there are 2 possible explanations: (a) it’s on the sea (b) the sw tried to download it but there was a failure. If (b) then delete the all…[Read more]

I am now getting an SRTM error:

sel_par: neither file D:SNAPBejaBeja_SARSLC2017RESULTSDemSynt nor D:SNAPBejaBeja_SARSLC2017RESULTSDemSynt.mat found

files D:SNAPBejaBeja_SARSLC2017RESULTSDemSynt and D:SNAPBejaBeja_SARSLC2017RESULTSDemSynt.mat not found

leggi_srtm: Warning! file D:SNAPBejaBeja_SARSLC2017..SRTMN05W033.hgt is all zeros!!…[Read more]

First of all, check well the data. Usually Sentinel should have good orbits, not requiring a manual GCP (keeping current orbits option works in most cases). By the way, what DEM did you use?
About posts, if he post is big enough and isolated (like those in parking lots) it should be firly well visible also in Sentinel data.
Buildings can be…[Read more]

I will try to select a different GCP than the auto GCP option. What are the best practices for GCP selection at Sentinel 1 resolution? I am aware posts are good for higher res. sensors, but what about ST1? A building?

check this tutorial: https://www.sarproz.com/publish/tutorials_partIV.pdf
best

Hi carolina,

Did you follow the tutorials available on the site? If you want to select a small area, go:

1. Select Area -> View Refl. Map

2. Now zoom in to the area of interest in the new image window

3. Once you have it in the field of view, press the Grab Area button

4. The values should be automatically input in the boxes, now press Load

Hi Steffan,
to properly judge the geo-referencing you should observe carefully the reflectivity map (not the changes) and you should look at multiple areas. If all areas present the same coherent shift, then it is a problem that can be corrected by choosing a GCP. Check this tutorial: https://www.sarproz.com/publish/data_import_partII.pdf
If the…[Read more]

I understand the unfinished.
I should use Mathlab Compiler? https://www.mathworks.com/products/compiler.html

It looks like you are missing the Matlab Signal Processing Toolbox.
You can use the compiled version instead
best

Hi everyone 🙂
I’m trying to use the program to generate DEM. But unfortunately, at the very beginning I have problems, when loading data in the SLC Data Processing window, the following message appears:
1 Slave images have not been extracted!!
Because of this I can not do the first step which is co-registration.
I created the appropriate data…[Read more]

At the moment no automatic import of external APS delay map is implemented.
However, you can do it in many ways if you can manipulate your data.
Inverted Residuals atmospheric delay is saved in the ATMOSPHERESGRAFO folder
they are binary files
The size is S/DSF x L/DSF (precise rounded values are in DimAtmo.mat, same folder). APS values are in…[Read more]

I would like to see the settlement of PS points over time. So is it better to use a time-series analysis rather than a cumulative displacement??

If you use the smart option, the modeled displacement is a non-parametric estimate of the displacement. In other words, the smart option filters the displacement, and the filtered series is the result.
modeled_disp = filter ( displacement )
The cumulative displacement in Sarproz is always calculated based on the model, so
cum_disp = modeled_disp…[Read more]

Hi Periz,
Thank you so much for quick response. I will try to read the papers you mentioned and the discussions in the forum,
Best regards,
Van Anh