Oil Spill detection empty results

Microwave Toolbox
#1

Hello,

I have been running the oil spill detection application over a couple of Sentinel-1 images. The images are:

  1. S1A_IW_GRDH_1SDV_20201012T041354_20201012T041419_034758_040CC5_2B11
  2. S1A_IW_GRDH_1SDV_20200901T040521_20200901T040546_034160_03F7CA_D7C9
  3. S1A_IW_GRDH_1SDV_20201124T040521_20201124T040546_035385_042277_EDEA
  4. S1A_IW_GRDH_1SDV_20210808T151957_20210808T152022_039140_049E7F_6CAA
  5. S1A_IW_GRDH_1SDV_20220303T154459_20220303T154524_042159_050601_6CAA

The processing over the first three works correctly, but with images 4 and 5, the processing seems to run successfully (no errors appear), but the results are empty, both Sigma0_VV and Sigma0_VV_oil_spill_bit_mask. If no oil spill was detected the bit mask could be empty, but Sigma0_VV should show what was the input to the oil spill tool.

The polygons I am using for the images are:

  • S1A_IW_GRDH_1SDV_20210808T151957_20210808T152022_039140_049E7F_6CAA

POLYGON ((37.41523549935894 44.48479337444719, 37.52308816982337 44.5049812386218,
37.55952719249142 44.61917889842728, 37.62421961364541 44.69489866516731,
37.418291427462485 44.74546202488434, 37.32338723645611 44.654807251442016,
37.33965698093744 44.50963693659517, 37.33965698093744 44.50963693659517,
37.41523549935894 44.48479337444719))

  • S1A_IW_GRDH_1SDV_20220303T154459_20220303T154524_042159_050601_6CAA

POLYGON ((31.059996309004138 46.340091182952946, 31.135081651302887 46.34966644474683, 31.119113059552493 46.40881969931172, 31.043952329826134 46.39924329976291, 31.059996309004138 46.340091182952946))

Any hint about what might be happening is welcome.

Thanks in advance,
Miguel