SAR mosaic - how to remove slant vertical stripes where scenes are stitched?

[eamler]

Dear all,

I downloaded 66 S1 GRDH scenes and want to mosaic those.
Before mosaicing I did
-> apply orbit file -> S-1 Remove GRD Border Noise ->
Radiometric calibration -> S-1 Slice assembly -> Radiometric
Terrain Flattening -> Geometric Terrain Correction -> SAR mosaic

Now one can see in the screenshot without weighted average of overlap (left) and with weighted average of overlap (right). I do not want to normalize because this messes up values in the final large mosaic.

Anyone has an idea how to work on this?

Best regards, Esther

[Ben]

perhaps you need to deburst the images

[eamler]

Thank you Ben!

For me as a new SAR user, another interesting new working step. But is it correct to deburst GRD products? As far as I understand, this working step has been already conducted in provided scenes:
‘For GRD products, the bursts are concatenated and sub-swaths are
merged to form one image. Bursts overlap minimally in azimuth and
sub-swaths overlap minimally in range. Bursts for all beams have been
resampled to a common grid during azimuth post-processing.’#
‘The input to the operator is the Sentinel-1 TOPSAR IW or EW SLC
product.’

[mfoumelis]

Please check previous post

SAR mosaic

OK, again, thanks clardeux, I got it now (I hope): with S1 GRDH also the orbit needs to be coorected -> apply orbit file -> S-1 Remove GRD Border Noise -> Radiometric calibration -> S-1 Slice assembly -> Radiometric Terrain Flattening -> Geometric Terrain Correction -> SAR mosaic (with 500 feather pixels and no weighted average of overlap or normalization) Now the 'quasi' horizontal stripes are gone and offsets disappear. I am still fighting with quasi vertical stripes where the mosaic stitche…