Incomplete gamma area map

Hi,

Another thread on gamma area maps generation.

This time I encountered a very weird case where the gamma area map has not been fully generated over the MGRS tile.

Here are the key info to reproduce the issue:

  • MGRS tile: 30UYU
  • start / end: 2024-12-20 / 2024-12/21
  • relative orbit: 132 (ascending)

Here are:

I used s1tiling docker image 1.2.0 and 1.4.2rc1 both leading to the same output.

The following screenshot shows the missing part of the gamma area map:

(granule on bottom: S1A_IW_GRDH_1SDV_20241220T174852_20241220T174917_057079_070420_FC0F, granule on top: S1A_IW_GRDH_1SDV_20241220T174917_20241220T174942_057079_070420_AC6D, )
Zoom on the top-right corner of the image:

I looked in the temporary generated files and looked at the gamma area map generated for the two granules.

S1A_IW_GRDH_1SDV_20241220T174852_20241220T174917_057079_070420_FC0F (granule on bottom):

S1A_IW_GRDH_1SDV_20241220T174917_20241220T174942_057079_070420_AC6D (granule on top):

So I suspect that there is something wrong with this.

Do you have any clue what could be the cause? I really don’t know if this is linked to the other topic I opened a few days ago (on visible gamma area image patterns in abrupt terrain).

S1Tiling report tells 0 computations errors. 0 search failures. 0 download failures. 0 download timeouts.

Many thanks!

Rémi