Search found 306 matches

by fsteinmetz
Mon Jan 04, 2021 11:44 am
Forum: Support
Topic: make auxdata_all crashing
Replies: 10
Views: 7478

Re: make auxdata_all crashing

Dear zhangYingyin,
Apologies, we are having a hardware issue again, and we are trying to restore it as soon as possible. When it is done, the files will be available again for download.
Kind regards,
François
by fsteinmetz
Fri Jan 01, 2021 5:39 pm
Forum: Support
Topic: Problems encountered when processing MDOIS
Replies: 15
Views: 9601

Re: Problems encountered when processing MDOIS

Dear Ding,

You can use the script tools/make_L1C.py to generate L1C files from L1A. This script uses l2gen. See also section 2.4 of the readme file.
Cheers,
François
by fsteinmetz
Fri Jan 01, 2021 5:24 pm
Forum: Support
Topic: SVC gains for Polymer 4.10 and 4.13
Replies: 3
Views: 3747

Re: SVC gains for Polymer 4.10 and 4.13

Yes indeed, the SVC update follows an update of the algorithm.
Cheers,
François
by fsteinmetz
Fri Dec 11, 2020 7:58 am
Forum: Support
Topic: Use polymer v4.13 to process OLCI in the presence of thin clouds
Replies: 1
Views: 2671

Re: Use polymer v4.13 to process OLCI in the presence of thin clouds

Hello, There are many parameters that can be tuned, but most likely none that would improve your results easily. Unfortunately Polymer is known to retrieve underestimated values of water reflectance in moderately to highly turbid waters. We are doing research on this topic and hopefully this will im...
by fsteinmetz
Thu Dec 10, 2020 9:28 am
Forum: Support
Topic: luts.py error
Replies: 4
Views: 3507

Re: luts.py error

Can you check that luts.py has not been modified ? The line 999 of this file is part of a multi-line statement, and I don't see why there would be an invalid syntax here. Or double-check that you are not using python2 by accident, I think this might be the most likely issue. Just type $ python --ver...
by fsteinmetz
Wed Dec 09, 2020 10:57 am
Forum: Support
Topic: luts.py error
Replies: 4
Views: 3507

Re: luts.py error

Hello,
I suspect you are using a python version older than 3.6, can you confirm ?
Python 3.6 or newer is required.
Cheers,
François
by fsteinmetz
Fri Nov 27, 2020 8:41 am
Forum: Support
Topic: Weird striped/blocky patterns in processed Rws and Flagbit 2048
Replies: 2
Views: 3075

Re: Weird striped/blocky patterns in processed Rws and Flagbit 2048

Dear Jan, Thanks for your feedback. Indeed in this case the area appearing in red does has unstable results, similar to what user vishnu identified. Work is underway to try and reduce this effect, but these are complex cases with very turbid waters (Mackenzie river). So it seems that the flag 2048 s...
by fsteinmetz
Tue Nov 24, 2020 11:44 am
Forum: Support
Topic: How to process landsat 7 data with POLYMER-v4.13?
Replies: 1
Views: 3471

Re: How to process landsat 7 data with POLYMER-v4.13?

Dear Ding,
It is not possible, there is no reader for Landsat7 data.
Kind regards,
François
by fsteinmetz
Thu Nov 19, 2020 2:44 pm
Forum: Support
Topic: Acquisition time set at 01 JAN 2000 00:00:00.0000
Replies: 1
Views: 2623

Re: Acquisition time set at 01 JAN 2000 00:00:00.0000

Hello,
Could you provide more details ?
The only attribute that is set in Polymer output regarding the acquisition time is called 'sensing_time', and after checking it is set correctly.
Cheers,
François
by fsteinmetz
Wed Nov 18, 2020 8:49 am
Forum: Support
Topic: SVC gains for Polymer 4.10 and 4.13
Replies: 3
Views: 3747

Re: SVC gains for Polymer 4.10 and 4.13

Hi Fernanda, The SVC gains are not the same in v4.10 and v4.13. They are defined in params.py, see self.calib in method defaults_olci. For your information, they have been reset to 1 because of an algorithm change in 4.11 which would make them inappropriate, then re-calculated with this algorithmic ...