SeaWiFS L2 processing errors

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wang2579
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Joined: Fri Jul 30, 2021 4:03 pm America/New_York
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SeaWiFS L2 processing errors

by wang2579 » Thu Jul 14, 2022 11:36 am America/New_York

Wish to process some SeaWiFS L1A files to L2 using l2gen (SeaDAS 8.1 or OCSSW) but failed in reading ancillary files.

(1) If just use all default parameters, either SeaDAS or OCSSW can run through smoothly and get a default L2 file.
Either OCSSW command or SeaDAS GUI mode works fine.

(2) However, if just added ancillary files in parfile:
ifile=/home/L1/S2003243191524.L1A_MLAC
ofile=/home/L1/S2003243191524.L2
met1=/home/L1/N200324318_MET_NCEPR2_6h.hdf
met2=/home/L1/N200324400_MET_NCEPR2_6h.hdf
met3=/home/L1/N200324400_MET_NCEPR2_6h.hdf
ozone1=/home/L1/N200324300_O3_EPTOMS_24h.hdf
ozone2=/home/L1/N200324400_O3_EPTOMS_24h.hdf
ozone3=/home/L1/N200324400_O3_EPTOMS_24h.hdf

L2gen program stopped with error messages:
** ERROR: get_ancillary: openHDF: Cannot open file -- SDstart failed on /home/L1/N200324318_MET_NCEPR2_6h.hdf
-E- /home/seadas/ocssw/src/l2gen/setanc.c 649: Error loading relative humidity ancillary data. /home/ocssw/share/common/anc_cor_file_28jan2014.nc
. . . . . .

How comes failed at those ancillary files reading (both SeaDAS & OCSSW commands) ?

Ancillary files are downloaded from OCDAAC:
162558 Sep 15 2018 N200324300_O3_EPTOMS_24h.hdf
734327 Oct 27 2020 N200324318_MET_NCEPR2_6h.hdf
731186 Feb 10 2020 N200324400_MET_NCEPR2_6h.hdf
162558 Jul 2 2020 N200324400_O3_EPTOMS_24h.hdf

Can you kindly help to complete this L2 processing with these ancillary files please ?
(ancillary files were used in official SeaWiFS L2 files)

Many thanks !

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OB SeaDAS - xuanyang02
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Re: SeaWiFS L2 processing errors

by OB SeaDAS - xuanyang02 » Thu Jul 14, 2022 1:03 pm America/New_York

I assume you are using OCSSW V2021.2.

If you want to do l2gen with ancillary files, you can click "Get Ancillary" on the main tab on l2gen GUI. I successfully did l2gen on S2003243191524.L1A_MLAC with the following ancillary files

icefile=/Users/*/ocssw-V2021.2/var/anc/2003/243/N2003243_SST_OIV2AVAM_24h.nc
met1=/Users/*/ocssw-V2021.2/var/anc/2003/243/N200324318_MET_NCEPR2_6h.hdf
met2=/Users/*/ocssw-V2021.2/var/anc/2003/244/N200324400_MET_NCEPR2_6h.hdf
met3=/Users/*/ocssw-V2021.2/var/anc/2003/244/N200324400_MET_NCEPR2_6h.hdf
ozone1=/Users/*/ocssw-V2021.2/var/anc/2003/243/N200324300_O3_EPTOMS_24h.hdf
ozone2=/Users/*/ocssw-V2021.2/var/anc/2003/244/N200324400_O3_EPTOMS_24h.hdf
ozone3=/Users/*/ocssw-V2021.2/var/anc/2003/244/N200324400_O3_EPTOMS_24h.hdf
sstfile=/Users/*/ocssw-V2021.2/var/anc/2003/243/N2003243_SST_OIV2AVAM_24h.nc

Bing

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