Debursting - java.lang.NullPointerException

Gherasim · May 4, 2018, 7:58am

Hello there!

I just downloaded an inSAR image, and i want to process the data using the SNAP software. First things first…i have to deburst the data. When i go to Radar -> Sentinel - 1 TOPS ->S-1 TOPS Deburst…instead of debursting my data, it gives me this error: “java.lang.NullPointerException”.

Anyone has any ideeas?

P.S. Begginer level, still trying to learn.

Thank you!

obarrilero · May 4, 2018, 8:59am

Hello,

what is your input product?

Gherasim · May 4, 2018, 9:16am

S1A_IW_SLC__1SDV_20160825T043726_20160825T043753_012752_01413D_394D

It’s an Interferometric Wide Swath Level 0 Product.

ABraun · May 4, 2018, 9:32am

Level 0 is not supported in SNAP

mengdahl · May 4, 2018, 9:55am

SLC is Level-1 so it should work.

Gherasim · May 4, 2018, 9:55am

yeah, yeah…sorry…it’s level 1

Gherasim · May 4, 2018, 9:58am

now i tried these steps:

Corregistration
Interferogram Formation
S-1 TOPS Deburst.
The deburst is still in progress…i think it will work. First time i tried to deburst the data exactly how it was initially (from the archive / .zip)

ABraun · May 4, 2018, 10:03am

Right, sorry.

Gherasim · May 4, 2018, 10:21am

After all…i managed to do the deburst…but now i got into another problem. I want to do a calibration of the data on the coregistered set of data. It says to me that i cannot do the calibration on it. Is there any other way to calibrate the values of intensity?

ABraun · May 4, 2018, 3:40pm

Calibration to Sigma0 loses complex information (i+q). If you want to calibrate for interferometric analysis you have to check “complex output”.