Very Basic Slice Assembly Failure

Microwave Toolbox
#1

Using SNAP 8.0.9 I’m finding an unusual failure when assembling together two specific slices. The second slice in never included in the slice-assembled output. I’ve tried various DEM’s and various orbit file sources. I’ve created the simplest possible graph that demonstrates the failure here. The failure is occurring for S1B_IW_GRDH_1SDV_20210826T152400_20210826T152429_028419_03640D_CF30.zip and S1B_IW_GRDH_1SDV_20210826T152429_20210826T152454_028419_03640D_83B1.zip (two adjacent slices from the same datatake). In the product explorer window we can see the result [3] of assembling slices [1] and [2] with the shown graph.

Any advice would be very helpful!

Thanks

Annotation 2022-08-10 164732
Annotation 2022-08-10 1647321920×660 162 KB

#2

I compared the metadata for both images:
There is nothing obvious other than a difference in the number of columns: 25444 and 25453, respectively. I do not know if this could be an issue for SliceAssembly.

I also verfied this metadata which does not appear to be an issue:
Both were processed using the same Sentinel-1 IPF version 003.31
The begin position for the second is approximately 1.5 ms after the end position of the first which appears correct:
endPosition >2021-08-26T15:24:29.858942Z
beginPosition>2021-08-26T15:24:29.860444Z

#3

Can you replicate the issue reported by wintermute?

#4

Yes, I have verified this failure.