New mistake in Sentinel 1 Toolbox in Offset Tracking

Microwave Toolbox
#1

On the computer with RAM 16 Gb was all steps on “Offset Tracking Tutorial” are executed
for two images:

  1. S1A_IW_GRDH_1SSV_20160805T004806_20160805T004831_012458_01376C_99F7
  2. S1A_IW_GRDH_1SSV_20160829T004807_20160829T004832_012808_01431E_01B3
    after performance of “Apply Orbit File” received two files:
  3. 1A_IW_GRDH_1SSV_20160805T004806_20160805T004831_012458_01376C_99F7_Orb
  4. 1A_IW_GRDH_1SSV_20160829T004807_20160829T004832_012808_01431E_01B3_Orb
    then I open in the SNAP window only images 1 and 2 and I start “DEM Assisted Coregistration”, using SRTM of 3 Sec and then “Create subset image” an “Offset Tracking” as a result appeared a mistake
    SentMistake.jpg850×463 72.5 KB


    In what reason of this mistake?
    Why after coregistration with use of DEM, the image in window will be turned on longitude, that is the right side has to be at the left and vice versa?
#2

coregistration shouln’t actually change your images’ orientation and extent.

Is the subset of the coregistered stack the input for your offset tracking?
Have you tried a smaller Registration window size (see Processing Parameters)?

#3

Hi,
Yes, thanks, I made smaller Registration window size, and it yielded result.
I received the correct geolocation through Radar - Geometric - Ellipsoid correction - Geolocation-Grid.
I do not understand why it does not occur after coregistration