Project Documentation GFZ Department 1

11/23/2022

01:33 PM GAMMA Questions SAR Data Preprocessing: Multilooking - a general question

Dear all,
I'm getting confused about the term "multilooking" which is used in gamma and other software. When I rea... Sofia Antonova

10/29/2018

05:21 PM GAMMA Questions DEM generation: RE: shift between TanDEM-X and external DEM

Dear Charles,
thanks a lot for your reply.
The heights of external DEM are above WGS84 ellipsoid, I made sure.
... Sofia Antonova

03:47 PM GAMMA Questions DEM generation: shift between TanDEM-X and external DEM

Hi,
I have several TanDEM-X CoSSC pairs and I'm trying to obtain differential interferograms using airborne laser... Sofia Antonova

03/20/2017

10:05 AM GAMMA Questions TerraSAR-X / TanDEM-X: RE: CoSSC TDX/TSX pair - poor coherence

I use SLC_intf. I just found out that calculation with full resolution gives high coherence but with multilooked imag... Sofia Antonova

03/06/2017

02:47 PM GAMMA Questions TerraSAR-X / TanDEM-X: CoSSC TDX/TSX pair - poor coherence

Dear all,
I'm facing the problem of very low coherence when calculating it for the bistatic pair of TDX/TSX.
Sho... Sofia Antonova

08/24/2016

11:45 AM GAMMA Questions DEM generation: DEM geocoding

Hi,
does anybody tried to geocode TSX DEM obtained by interferometry? I ended up with the file $1_$2.hgt, then I u... Sofia Antonova

08/03/2015

10:57 AM GAMMA Questions DEM generation: RE: TSX DEM generation - undesired negative values

Hi all,
I just did unwrapping once again, and height file looks much better now! Sorry for spamming! Thanks for i... Sofia Antonova

07/31/2015

02:47 PM GAMMA Questions DEM generation: RE: TSX DEM generation - undesired negative values

Hi Julia, hi Jackie,
I used branch-cut method and I did use the bridge command to unwrap step by step over the rive... Sofia Antonova

02:29 PM GAMMA Questions DEM generation: TSX DEM generation - undesired negative values

I'm trying to proceed 4-pass differential interferometry with my TSX data. For that I want to create a DEM based on t... Sofia Antonova

03/31/2015

04:08 PM GAMMA Questions SAR Data Preprocessing: RE: sigma nought/gamma nought backscatter

Response from Tazio Strozzi:
The difference between your $1.mli and $1.cmli_sigma images is the
calibration facto... Sofia Antonova