Search found 269 matches

by OB SeaDAS - dshea
Mon Jan 26, 2026 9:15 am America/New_York
Forum: Home
Question: l3mapgen is extremely slow when generating 500 m daily mosaic over China region – any optimization suggestions?
Replies: 1

Re: l3mapgen is extremely slow when generating 500 m daily mosaic over China region – any optimization suggestions?

At 500m you might be running into a cache size problem with l3mapgen writing NetCDF. Try running l3mapgen with "deflate=0". The file will be a lot bigger without compression, but this should speed up processing if the cache is the problem. You can always run h5repack on the file to compres...
by OB SeaDAS - dshea
Fri Dec 19, 2025 11:46 am America/New_York
Forum: Home
Question: mismatch in ntime
Replies: 3

Re: mismatch in ntime

MODIST lasted longer than one of the internal tables could handle.
Need to use T20025.16 or later. See:

viewtopic.php?t=7294

don
by OB SeaDAS - dshea
Fri Dec 12, 2025 12:20 pm America/New_York
Forum: Home
Question: MODIS L2GEN error: "mismatch in ntime" when reading XCAL file xcal_modist_txc_oc_v4.9b_412.hdf
Replies: 1

Re: MODIS L2GEN error: "mismatch in ntime" when reading XCAL file xcal_modist_txc_oc_v4.9b_412.hdf

The problem is that we did not expect Terra to last this long... We only had space in the code for 300 date records and the current xcal file for modist (xcal_modist_txc_oc_v4.12b) has ndates = 307. The fix for this first appearers in T2025.16 so any tag after that should work. Sorry it is not in an...
by OB SeaDAS - dshea
Fri Dec 12, 2025 12:19 pm America/New_York
Forum: Home
Question: MODIS-T XCAL v4.9b / v4.10b cause mismatch in ntime in l2gen (OCSSW V2025.5)
Replies: 1

Re: MODIS-T XCAL v4.9b / v4.10b cause mismatch in ntime in l2gen (OCSSW V2025.5)

The problem is that we did not expect Terra to last this long... We only had space in the code for 300 date records and the current xcal file for modist (xcal_modist_txc_oc_v4.12b) has ndates = 307. The fix for this first appearers in T2025.16 so any tag after that should work. Sorry it is not in an...
by OB SeaDAS - dshea
Thu Nov 13, 2025 12:23 pm America/New_York
Forum: Home
Question: OCSSW Install Error - "unsupported Mac machine = x86_64"
Replies: 2

Re: OCSSW Install Error - "unsupported Mac machine = x86_64"

NASA does not allow Intel Macs, since they are too old to support. I had to remove Mac Intel support on May 16 2025. The last tags with Intel support are: T2025.9 V2025.1 These tags or older willl work for you, but yo will need an old installer. Download these two files in the same dir: https://ocea...
by OB SeaDAS - dshea
Thu Aug 14, 2025 11:27 am America/New_York
Forum: Home
Question: OCSSW install error on older Mac with Intel
Replies: 1

Re: OCSSW install error on older Mac with Intel

I no longer have access to an Intel mac at NASA, so I had to discontinue the intel mac distributions

T2025.14 was the last tag with intel mac support. You will have to grab the install_ocssw and manifest.py from that tag to install on an intel mac.

don
by OB SeaDAS - dshea
Tue Jul 22, 2025 12:13 pm America/New_York
Forum: Home
Question: PACE OCI resolution question
Replies: 1

Re: PACE OCI resolution question

Actually 4 pixels are aggregated in the across track direction. The aggregation is done on the spacecraft before the data is transmitted. We do not have enough bandwith to send all the data. There is no way to get the individual unaggregated data.

don
by OB SeaDAS - dshea
Fri May 16, 2025 12:18 pm America/New_York
Forum: Home
Question: SeaDAS new l2gen very slow
Replies: 19

Re: SeaDAS new l2gen very slow

What system are you running on?
l2gen does not get anything from the network.

don
by OB SeaDAS - dshea
Thu Apr 10, 2025 4:51 pm America/New_York
Forum: Home
Question: Missing gas transmittance file for S2B MSI
Replies: 4

Re: Missing gas transmittance file for S2B MSI

we have not generated gas transmittance tables for MSI. Your command will work if you get rid of "gas_opt=32".

don
by OB SeaDAS - dshea
Tue Mar 25, 2025 11:52 am America/New_York
Forum: Home
Question: Missing gas transmittance file for S2B MSI
Replies: 4

Re: Missing gas transmittance file for S2B MSI

Sorry about that. We do not have a gas transmittance table for MSI yet.
Just put this on the l2gen command line or par file.

gas_transmittance_file=none

don