Search found 24 matches

by gbourdin
Thu Feb 29, 2024 9:56 pm
Forum: Support
Topic: GSW landmask with MSI
Replies: 0
Views: 348

GSW landmask with MSI

Hi François, hi everyone, I am trying to apply the GSW landmask to MSI scenes with the command below with polymer-4.17beta2 but I see no difference with the scene I process without using the GSW landmask. The GSW netcdf are downloaded in the correct directory and I get no error when the image is pro...
by gbourdin
Mon Nov 06, 2023 4:22 pm
Forum: Support
Topic: Change in Earthdata API
Replies: 15
Views: 37568

Re: Change in Earthdata API

Hello Nathan,
Is it possible to have access to this release quickly?
I am having the same problem to process near real time data and need to fix it as soon as possible to send data for two cruises currently at sea.
Best,
Guillaume
by gbourdin
Thu Jul 13, 2023 7:04 pm
Forum: Support
Topic: Inconsistencies in tau_r, K_O2, and K_NO2 coefficients
Replies: 2
Views: 21901

Inconsistencies in tau_r, K_O2, and K_NO2 coefficients

Hello François, I have modified ./polymer/level1_nasa.py and ./polymer/params to add VIIRS-JPSS2 tau_r, K_O2, and K_NO2 (from NASA-OceanColor website: https://oceancolor.gsfc.nasa.gov/resources/docs/rsr_tables/ ) and add support for VIIRS-JPSS2 in POLYMER, it seems to work well. It would be great to...
by gbourdin
Wed Oct 05, 2022 6:12 pm
Forum: Support
Topic: Sentinel 2 striping
Replies: 3
Views: 2943

Re: Sentinel 2 striping

Hello, To my understanding, polymer does not correct for stripping but you can try a de-striping algorithm: https://opg.optica.org/oe/fulltext.cfm?uri=oe-22-23-28058&id=303697 I have personally never tried using this type of correction but according to the example presented in the paper, it should w...
by gbourdin
Mon Aug 29, 2022 7:00 pm
Forum: Support
Topic: output nLw using POLYMER
Replies: 2
Views: 2821

Re: output nLw and Ed using POLYMER

Hi François, Thank you I managed to get nLw from Rw and the extraterrestrial solar flux. I am now trying to get Ed(0-). I would need to account for tau_rayleigh, tau_gases and tau_aerosol to attenuate F0 through the atmosphere. I believe I can get tau_rayleigh from the surface pressure (sp), and tau...
by gbourdin
Mon Aug 29, 2022 6:41 pm
Forum: Support
Topic: custom ancillary folder doesn't work for NASA satellites
Replies: 2
Views: 2702

Re: custom ancillary folder doesn't work for NASA satellites

Hi François, Sorry I was at sea for a while. I was indeed using the argument "directory" to the class Ancillary_NASA but it wasn't working. It was still downloading the ancillary data without crashing but it was creating the usual folder with the year number and Julian day. The error happened later ...
by gbourdin
Fri Jul 01, 2022 9:21 pm
Forum: Support
Topic: custom ancillary folder doesn't work for NASA satellites
Replies: 2
Views: 2702

custom ancillary folder doesn't work for NASA satellites

Hi François, I am processing MODIS, VIIRS and OLCI using NASA and ERA5 ancillary data. I can't make polymer download and use the ancillary data from a custom ancillary folder that I define when I process NASA satellites. It works perfectly with ERA5 though... I have installed polymer 4.14 Best, Guil...
by gbourdin
Mon Apr 11, 2022 2:58 pm
Forum: Support
Topic: output nLw using POLYMER
Replies: 2
Views: 2821

output nLw using POLYMER

Hi all,
Is there any way to output nLw using POLYMER?
Best,
Guillaume
by gbourdin
Fri Apr 08, 2022 11:38 pm
Forum: Support
Topic: ERROR:cdsapi:Reason: Request returned no data
Replies: 3
Views: 3291

Re: ERROR:cdsapi:Reason: Request returned no data

Hi François, I may have found the problem. I am only processing the zone of interest of the L1A file into L1C using the same sline, eline, srow and erow on l2gen. The output file are usually ~600K except the ones that make the ancillary request crash on POLYMER. Those ones are ~200K so the zone I am...
by gbourdin
Wed Mar 09, 2022 3:56 pm
Forum: Support
Topic: ERROR:cdsapi:Reason: Request returned no data
Replies: 3
Views: 3291

Re: ERROR:cdsapi:Reason: Request returned no data

I have set my program to create an ancillary folder for each image separately and found out that polymer is creating a folder dated to 1970/01/01 ANCILLARY/ERA5/A2017315041000/1970/01/01/ for all the image the cdapi can't find ancillary data for: A2017315041000/ A2018035061500/ A2018043052500/ A2018...