SARPROZ ©

Let me add a little bit more of my own understanding.

First of all, the shift is caused by the fact that the height of that point you try to estimate (using PSI) is not corrected. You said it is DEM error, but the better saying should be “height estimation error”.

In Sentinel-1 data, the normal baseline is very small, hence the height ambiguity…[Read more]

sry I dont understood correctly. Does H estimation in urban areas are nessery or not? If ext. Dem is ok.

I agree that in SarProz I can do everything. But I want to do something meaningful, because I think it is not a toy.
So I have to know that philosophy is behindthose buttons that I push.

this is an other good reading: https://engineering.purdue.edu/~perissin/CE697_insar/MTINSAR.pdf
avoiding estimating the DEM error can cause a wrong movement estimation (because the topographic phase acts as noise on the phase values).
but you are right, Sentinel has short normal baselines, and if your DEM is good, you can assume most of the…[Read more]

Thank You. It was very fruitful reading. If I understood correctly the positional shift caused mainly by DEM error.
In Sarproz displacement calculation totorials mainly H is also estimated. I deal with Sentinel data mainly. According to my knowledge, Sentinel is not very good dataset for dem estimation. So, does H estimation have some other…[Read more]

The short answer is: you need to take a course on the subject.
The longer answer: read this https://engineering.purdue.edu/~perissin/CE597_radar_remote_sensing/10336.pdf
and also all material you find on this website, including the papers here: https://www.sarproz.com/scientific-publications/
best

1. please read the forum rules about what to include in your post
2. as the message says, ur RAM is too low
3 possible workaround: do not generate jpeg files (to do this check the related option in the advanced parameters)

Thanks a lot! Seems like it was a network problem. The precise orbits were successfully applied when I switched to another internet connection.
Now I will have to figure out how to repair my other connection too

Kind regards,
Mihaela

First of all, Sentinel-TOPS can only be processed one subswath at a time for now.

In the second place, there are always a few lines at the border that might be out of the area (just a few lines). The system will automatically adjust the area so that a common area is selected.

As long as you can extract and coregister fine you can ignore this…[Read more]

Hello,

The FTP site is working well. There is either a network blocking issue (not necessarily from your side) or there also might be a proxy issue (if for any chances you are using a proxy).

I would try to test the following to rule out problems:
1. try to connect using a client, i.e., filezilla, and check if the connection works;
2. If you…[Read more]

The software has been updated since I uploaded the document.
These are the new log and lasterror files now:

Could you please send me the new lasterror.mat and log regarding the orbits downloading issue? – and before that, please update to the newest version of sarproz. I see in the previous log that you are using an old version from September last year. Please make sure you are using the newest version of sarproz.

yuxiao

Thank you for your answer!
I tried connecting to the url and it worked.
I have uninstalled the antivirus to make sure there’s no left firewall on. The one from windows is disabled.

I have attached another type of message I receive when I open the program besides the Java error after I try setting the orbits

Regards,
Mihaela

Hello,

Can you go to your browser and enter the following url:

ftp://johndoe:psinsar12138@128.46.174.159/data/S1A/

And see if you can connect. If you can, also try to go into the folder and randomly download a few orbits.

If you cannot connect it means something is still blocking your ftp protocol. If you can connect, then let me know and I…[Read more]

Thank you,

I have updated my software to the newest version, but unfortunately, the problem persists.

Kind regards,
Mihaela

no

It’s a network problem. Try again later. Or check if your network is behind a firewall or a proxy. You can also try to use a different connection (like from home or through a mobile device)