Hi, i think my case would be also relating to this topic, just to inform i would like to post what i faced
i have processed number of SLC data, where the process steps are taken as
Thermal noise removal > Calibration > deburst > Multilook > Speckle Filter > Terrain Flattening > Terrain Correction
i have used:
S1A_IW_SLC__1SSV_20141219T204259_20141219T204327_003793_004879_4929
S1A_IW_SLC__1SSV_20150112T204258_20150112T204326_004143_00505A_DA6E
S1A_IW_SLC__1SSV_20150313T204258_20150313T204325_005018_0064AB_41C6
S1A_IW_SLC__1SSV_20150418T204258_20150418T204325_005543_007169_C251
S1A_IW_SLC__1SSV_20150512T204259_20150512T204326_005893_00796F_DB0E
S1A_IW_SLC__1SSV_20150605T204301_20150605T204328_006243_0082A3_A8B3
S1A_IW_SLC__1SSV_20150723T204303_20150723T204330_006943_00965B_7C85
S1A_IW_SLC__1SSV_20150816T204304_20150816T204331_007293_00A009_5739
S1A_IW_SLC__1SSV_20150909T204305_20150909T204332_007643_00A994_2B73
S1A_IW_SLC__1SSV_20151027T204306_20151027T204333_008343_00BC63_DE97
S1A_IW_SLC__1SSV_20151120T204300_20151120T204327_008693_00C5E2_C43B
now, for all of the data except for the last 20151120 data, it works out okay without any shifting problems
but when i process with the 20151120 data i figured out that there were a kind of shifting to the west direction, kind of more shrinked compared to the other data.
here is example data scene (zoomed) from 20151027:
here is the 20151120 scene overlapped with the 20151027 data:
it is kind of shifted south west. i have used the collocation module and figured out fitting it to the other scenes
but just to show, this is what happened after the process
i noticed that the coverage of the observed scene has changed more into north area, i dont know if that changes made such shifting to it
thanks