Curious "Apply-Orbit" Fail

Dear all,

I was performing 2D-displacements time-series using offset tracking. To do so, I created a graph where one of the first step consists in applying precise orbits. I also let the software fails if no precise orbits are found.

Everything was fine untill images from February the 26 where i’ve got the error message : error in opening zip file (see picture below)

For images after this date, the same problem occurs. My first thought was that maybe my files are corrupted ? So I re-downloaded the images but I still got the same issue.

I discovered that if I check the button Do not fail if new orbits file is not found , the process runs well. Nevertheless, I had in mind that the error message was much more explicit in this case, like No valid orbit file found.

So I tested an image where there was obviously no precise orbit (mid-may) and, as we all guess, the message No valid orbit file found popped up.

That’s strange because, my images can be read, precise orbits should be available but Apply Orbit File doesn’t work.

Does anyone has any info ?

Thanks in advance

Quentin Glaude

PS : here’s my images where it fails :

  • S1A_IW_GRDH_1SSH_20180226T184521_20180226T184546_020781_023A06_82E8.SAFE
  • S1A_IW_GRDH_1SSH_20180322T184521_20180322T184546_021131_024510_F496.SAFE
  • S1A_IW_GRDH_1SSH_20180403T184522_20180403T184547_021306_024A9C_835E.SAFE
  • S1A_IW_GRDH_1SSH_20180415T184522_20180415T184547_021481_02500E_2D0F.SAFE
  • S1A_IW_GRDH_1SSH_20180427T184523_20180427T184548_021656_025585_801E.SAFE

Hi Quentin,
I know you found the post explaining the reason for this problem already, but for others and for completeness:

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