VIIRS/SNPP

Use this Forum to find information on, or ask a question about, NASA Earth Science data.
Post Reply
emanuele_bohm
Posts: 9
Joined: Wed Sep 06, 2006 10:54 am America/New_York
Answers: 0

VIIRS/SNPP

by emanuele_bohm » Thu Sep 29, 2022 4:57 am America/New_York

VIIRS/SNPP files missing in https://oceancolor.gsfc.nasa.gov/ Level 1&2 browser since 2022-09-28

Tags:

OB.DAAC - SeanBailey
User Services
User Services
Posts: 1364
Joined: Wed Sep 18, 2019 6:15 pm America/New_York
Answers: 1

Re: VIIRS/SNPP

by OB.DAAC - SeanBailey » Thu Sep 29, 2022 6:46 am America/New_York

The forward stream for both the SNPP_VIIRS and NOAA20_VIIRS instruments was paused while we reconfigure our production system to prepare for the R2022 reprocessing. The data flow should resume later today.

Regards,
Sean

dem1
Posts: 76
Joined: Mon Nov 28, 2005 4:49 am America/New_York
Answers: 0

Re: VIIRS/SNPP

by dem1 » Fri Sep 30, 2022 5:12 am America/New_York

Hi,

For information I found in your archive one suspect file which does not follow the new file naming convention (it ends with *.SNPP_OC.NRT.nc):
https://oceandata.sci.gsfc.nasa.gov/ob/getfile/SNPP_VIIRS.20220928T223000.L2.SNPP_OC.NRT.nc

Best,
Julien

OB.DAAC - SeanBailey
User Services
User Services
Posts: 1364
Joined: Wed Sep 18, 2019 6:15 pm America/New_York
Answers: 1

Re: VIIRS/SNPP

by OB.DAAC - SeanBailey » Fri Sep 30, 2022 8:46 am America/New_York

Thanks, we'll fix that ASAP.

Sean

oo_processing
Posts: 261
Joined: Wed Apr 06, 2005 12:11 pm America/New_York
Answers: 0

Re: VIIRS/SNPP

by oo_processing » Fri Sep 30, 2022 1:34 pm America/New_York

OB.DAAC - SeanBailey wrote: Thu Sep 29, 2022 6:46 am America/New_York The forward stream for both the SNPP_VIIRS and NOAA20_VIIRS instruments was paused while we reconfigure our production system to prepare for the R2022 reprocessing. The data flow should resume later today.

Regards,
Sean
Hello Sean,

Allow me to recall the message from oceancolor mail-list,
"****** IMPORTANT NOTICE FOR SEADAS USERS ******
......So it is important that SeaDAS users who process VIIRS geolocation data locally update their OCSSW code to the R2022.12 version (which includes the v3.2.0 VIIRS L1 code), and run the update_luts script to obtain the latest VIIRS L1 LUTs. Alternatively, to maintain a processing flow using the existing code, users will need to disable any automated runs of update_luts for the VIIRS sensors."

Now I got the following error with OCSSW V2022.0:
######################################
geolocate_viirs v ifile=V2022271040600.L1A_SNPP.nc geofile_mod=V20222710406.GEO
Main:: Geolocating L1A V2022271040600.L1A_SNPP.nc

VcstCmnLutInputItem:: Failure opening LUT file: /shares/cms_optics/apps/seadas/ocssw/V2022.0/var/viirsn/cal/OPER/VIIRS_NPP_CMN_LUT_v3.0.0.2_obpg.nc
VcstCmnLutInputItem:: Failure reading netCDF file for LUT PLATFORM_LUT
VcstCmnGeo::LUT initialization failure
Main:: Geolocation processing failure for v
######################################

Was the error caused by the luts update mentioned in the mail-list? The --list_tags gives all OCSSW tags as follows, is the underlined one that we need to install?

$ ./install_ocssw --list_tags
R2020.1
R2022.0
R2022.1
R2022.10
R2022.11
R2022.12
R2022.13
R2022.14
R2022.2
R2022.3
R2022.4
R2022.5
R2022.6
R2022.7
R2022.8
R2022.9
T2020.0
T2020.1
T2020.2
T2020.3
T2020.4
T2020.5
T2020.6
T2020.7
T2021.0
T2021.10
T2021.11
T2021.12
T2021.13
T2021.14
T2021.15
T2021.16
T2021.17
T2021.18
T2021.19
T2021.20
T2021.21
T2021.22
T2021.23
T2021.24
T2021.3
T2021.4
T2021.5
T2021.6
T2021.7
T2021.8
T2021.9
T2022.0
T2022.1
T2022.10
T2022.11
T2022.12
T2022.13
T2022.14
T2022.15
T2022.16
T2022.17
T2022.18
T2022.19
T2022.2
T2022.20
T2022.21
T2022.22
T2022.23
T2022.24
T2022.25
T2022.26
T2022.27
T2022.3
T2022.4
T2022.5
T2022.6
T2022.7
T2022.8
T2022.9
V2020.0
V2020.1
V2020.2
V2021.0
V2021.1
V2021.2
V2022.0
don
initial
v3.1.0
v3.1.0-rc
v3.1.0-rc1

Thanks!
-Yuyuan

OB.DAAC - SeanBailey
User Services
User Services
Posts: 1364
Joined: Wed Sep 18, 2019 6:15 pm America/New_York
Answers: 1

Re: VIIRS/SNPP

by OB.DAAC - SeanBailey » Fri Sep 30, 2022 3:54 pm America/New_York

Yuyuan,

If your LUTs were updated (and since the error reports it can't find the v3.0.0.2 lut, I'd say they were), your options are to update to a compatible R tag (R2022.12 or later ...best to use the current latest R2022.14) or restore the older LUTS to your $OCVARROOT/viirsn/cal/OPER tree. You can find them in the EVAL path under:
https://oceandata.sci.gsfc.nasa.gov/Ancillary/LUTs/viirsn/cal/EVAL/ (running update_luts with the "-e, --eval" option will pull them over, but not put them in OPER). Look in $OCDATAROOT/viirs/npp/instrument_defaults.par for the ones to restore.

If you go with the 'keep V2022.0 tag' option, make sure to disable the lut updates or you'll undo the changes you made.

Sean

oo_processing
Posts: 261
Joined: Wed Apr 06, 2005 12:11 pm America/New_York
Answers: 0

Re: VIIRS/SNPP

by oo_processing » Tue Oct 04, 2022 1:00 pm America/New_York

R2022.14 works. Thanks Sean.

Post Reply