Search found 38 matches

by andrew.meredith
Fri Feb 23, 2024 11:04 am America/New_York
Forum: Questions/Comments
Question: l2gen very slow when using output from l1bextract_safe_nc
Replies: 3

Re: l2gen very slow when using output from l1bextract_safe_nc

Thanks for the update. I implemented the following change in the nccopy_var function in netcdf_utils.py to set chunking when creating the output variable that fixed the problem for me: # create variable with same name, dimnames, storage format zlib = srcvar.filters().get('zlib', False) shuffle = src...
by andrew.meredith
Tue Feb 20, 2024 4:54 pm America/New_York
Forum: Questions/Comments
Question: l2gen very slow when using output from l1bextract_safe_nc
Replies: 3

Re: l2gen very slow when using output from l1bextract_safe_nc

The problem seems to be related to different values being assigned to ChunkSizes in the l1bextract_safe_nc output netCDF files. Using nccopy to recreated radiance files with updated ChunkSizes gave much better l2gen performance. I see there's a "TODO: get and set chunksizes" comment in the...
by andrew.meredith
Thu Feb 15, 2024 2:19 pm America/New_York
Forum: Questions/Comments
Question: l2gen very slow when using output from l1bextract_safe_nc
Replies: 3

l2gen very slow when using output from l1bextract_safe_nc

The time for l2gen to process an OLCI granule subset using l1bextract_safe_nc takes significantly longer than processing the full granule (l2gen version msl12 9.6.0-V2023.3 (Oct 4 2023 22:27:24)). I tested on both RHEL8.9 and Ubuntu 22.04 with similar results. The following example demonstrates the ...
by andrew.meredith
Tue Jan 02, 2024 10:22 am America/New_York
Forum: Questions/Comments
Question: lonlat2pixline outputs incorrect pix/lin values
Replies: 2

Re: lonlat2pixline outputs incorrect pix/lin values

Thanks Sean. I will follow up with ESA.

Andrew
by andrew.meredith
Thu Dec 07, 2023 12:03 pm America/New_York
Forum: Questions/Comments
Question: lonlat2pixline outputs incorrect pix/lin values
Replies: 2

lonlat2pixline outputs incorrect pix/lin values

Hi, The OCSSW program lonlat2pixline gives incorrect pixel/line values for some MERIS L1B input files. I used lonlat2pixline to first get the pixel/line values for a bounding box covering Lake Erie and then used the output to subset the MERIS L1B file to what should be Lake Erie. lonlat2pixline /dat...
by andrew.meredith
Fri Apr 01, 2022 1:05 pm America/New_York
Forum: Questions/Comments
Question: modis_L1A not recognizing --output option
Replies: 1

modis_L1A not recognizing --output option

The modis_L1A script is no longer recognizing the --output option.

I'm running the T2022.7 version

Andrew
by andrew.meredith
Thu Feb 17, 2022 10:58 am America/New_York
Forum: Questions/Comments
Question: Ozone ancillary data
Replies: 1

Ozone ancillary data

I thought i saw a post that issues with Ozone ancillary data were resolved, but the anc_data_api is still not returning Ozone (for requests after 2021-05-17). Is that expected? https://oceandata.sci.gsfc.nasa.gov/api/anc_data_api/?&m=7&s=2022-01-29T17:10:00&e=2022-01-29T17:20:00 {"f...
by andrew.meredith
Mon Nov 08, 2021 2:54 pm America/New_York
Forum: Questions/Comments
Question: Error reading MERIS file from l2gen
Replies: 4

Re: Error reading MERIS file from l2gen

Thanks. I saw that and after updating SNAP I was able to process the file!
by andrew.meredith
Mon Nov 01, 2021 8:10 am America/New_York
Forum: Questions/Comments
Question: Error reading MERIS file from l2gen
Replies: 4

Re: Error reading MERIS file from l2gen

Great. Thanks.

Any estimate on date of next release?
by andrew.meredith
Fri Oct 29, 2021 8:42 am America/New_York
Forum: Questions/Comments
Question: Error reading MERIS file from l2gen
Replies: 4

Error reading MERIS file from l2gen

Hi I'm getting errors trying to process the latest MERIS L1B files using SeaDAS v8.1 with OCSSW T2021.21 (on linux VM with RHEL). The following provides an example of the processing steps that lead to the problem: lonlat2pixline /data/MERIS/RR_4th/FL/EN1_MDSI_MER_RR__1P_20020516T154356_20020516T1627...