| Instruments | Ancillary File Names | Update Frequency | Source Organization & Files Location | Agency | SPAs Using This Data | Support | AQUA-MODIS | MYD02_Emissive_LUTS*, MYD02_QA_LUTS*, MYD_Reflective_LUTS* | Few Times a Year* | MCST - MODIS Charcterization and Support Team . The LUT to be downloaded is under "No PV LWIR cross-talk correction" OR NASA Ocean - MODISA/ MODIST | NASA | MODISL1DB_SPA / IPOPP | ocean-color+subscribe@oceancolor.gsfc.nasa.gov / IPOPP |
|---|---|---|---|---|---|---|
TERRA-MODIS | MYD02_Emissive_LUTS*, MOD02_QA_LUTS*, MOD_Reflective_LUTS* | |||||
JPSS-VIIRS | L1B/*VCST*.tar.gz | VCST (VIIRS Characterization and Support Team): VIIRS - J1, VIIRS - J2, and VIIRS - SNPP | VIIRS-L1_SPA IPOPP | ocean-color+subscribe@oceancolor.gsfc.nasa.gov | JPSS-ATMS | ADL_* | Field Terminal System | NOAA | IPOPP | ESPCOperations@noaa.gov |
JPSS-CRIS | ADL_* | |||||
JPSS-VIIRS | ADL_*/JPSS-1_VIIRS_ADL_LU*.tar.gz | VIIRS-L1_SPA IPOPP | ||||
JPSS-OMPS | OMPS-N20_NP-DRK-* | OMPSNADIR_SPA IPOPP |
Note - These are Level -1 coefficient Look Up Tables (LUTs). They are updated periodically by the Flight Operations and Cal/Val teams at NASA (MCST & VSCT for MODIS and VIIRS respectively) and NOAA (for the SNPP, J1 and J2 OMPS, VIIRS, CrIS and ATMS suite of SDR data)
| Ancillary Data | Example File Names | Update Frequency | File Location | Maintaining Agency | DRL SPAs using this data |
|---|---|---|---|---|---|
Digital Elevation Model (DEM) | dem30ARC_E60N0.hdf, dem30ARC_EN60N90.hdf, dem30ARC_W60N0.hdf, dem30ARC_W60N90.hdf, dem30ARC_W180N0.hdf, dem30ARC_W180N90.hdf | Static files - at DRL this data has not been updated since 2005 | LAADS - https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/1/DEM30ARC/ | NASA | NDVIEVI_SPA IPOPP |
WDB2 - includes coastline and waterbodies database | bdy.dat, cil.dat, riv.dat | Static files - at DRL this data has not been updated since 2005 | LAADS - https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/1/DEM30ARC/ | NASA | NDVIEVI_SPA IPOPP |
Note - The ancillary files listed above are static files and have not been updated since 2005 and availbale through DRL. There are various other updated high resolution DEM data available through USGS website.
| Ancillary Data | Example File Names | Update Frequency | Alternate location to get the files | Details | Maintaining Agency | DRL SPAs using this data | Support | Clear Sky Radiances | MODCSR_B.A2023136.061.2023144082338.hdf | Daily | Note- LAADS link requires user registration to NASA Earthdata forum | The file contains 1-degree zonal mean clear-sky biases (observed minus calculated radiance differences) and associated statistics for bands 31 and 33-36 for each calendar day from the previous eight-day period. | NASA | Cloudmask_SPA, Aerosol_SPA, L2GEN IPOPP | MODAPSUSO@lists.nasa.gov |
GDAS | gdas1.PGrbF00.230522.06z, gdas1.PGrbF00.230524.00z.grib2 | every 6 hours | https://bin.ssec.wisc.edu/pub/eosdb/ancillary/ https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/61/GDAS_0ZF/ https://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gdas.20250701/00/atmos/ Note - The variables in red font changes for each day; | This is a 6-hour forecast / analysis from the GFS model. It is gridded to 1 degree. Can be downloaded directly. Data can be downloaded from the links. | NASA/U. Wisc/NOAA | Cloudmask_SPA, Aerosol_SPA, L2GEN IPOPP | MODAPSUSO@lists.nasa.gov https://www.ssec.wisc.edu/datacenter/mailing-list/ |
GFS | gfs.t00.230531.pgrbf03, gfs.t00.230531.pgrbf03.grib2 | multiple times each day | https://bin.ssec.wisc.edu/pub/eosdb/ancillary/2025_07_08_189/forecast/ https://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gdas.20250701/00/atmos/ Note - The variables in red font changes for each day; | This is Global Forcast System. The model runs upto 4 times each day and geneartes forecast data upto 16 days in advance. It produces data 3 hourly. Data can be dowloaded from the links. | NOAA/U. Wisc | Cloudmask_SPA, Aerosol_SPA, L2GEN IPOPP | MODAPSUSO@lists.nasa.gov https://www.ssec.wisc.edu/datacenter/mailing-list/ |
NISE | NISE_SSMIF13_20230530.HDFEOS | Daily | https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/1/NISE/ https://n5eil01u.ecs.nsidc.org/OTHR/NISE.005/2023.06.06/ | This is a 5-day running average snow and sea ice cover (yes/no for snow and a percentage cover for sea ice) from the SSM/I-SSMIS instrument provided by the NSIDC (National Snow and Ice Data Center). The product is output on a polar grid at 20km resolution. | NASA/NOAA | L2GEN, IPOPP | MODAPSUSO@lists.nasa.gov |
OCEANSICE | N202300100_SEAICE_NSIDC_24h.hdf | every 6 hours | Instructions to download data are provided at the website | NASA | L2GEN, IPOPP | ocean-color+subscribe@oceancolor.gsfc.nasa.gov |
OCEANSMET | S202315800_NCEP.MET | few times every day | Instructions to download data are provided at the website | NASA | L2GEN, IPOPP | ocean-color+subscribe@oceancolor.gsfc.nasa.gov |
OCEANSTOAST | S20201480014823_TOAST.OZONE | once a week | Instructions to download data are provided at the website | NASA | L2GEN, IPOPP | ocean-color+subscribe@oceancolor.gsfc.nasa.gov |
SEAICE | eng.230530 | Daily | https://bin.ssec.wisc.edu/pub/eosdb/ancillary/ https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/61/SEA_ICE | This is a gridded 0.5 degree sea ice fraction product. It contains information that is almost the same as information in the NISE product | NASA/U. Wisc | Cloudmask_SPA, Aerosol_SPA, L2GEN IPOPP | SST | oisst.20230510 | Daily | https://bin.ssec.wisc.edu/pub/eosdb/ancillary/SST/ https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/61/REYNSST/ | This is a weekly Reynolds sea surface temperature gridded product. | NASA/U. Wisc | Cloudmask_SPA, Aerosol_SPA, L2GEN IPOPP | TOAST | TOAST16_230530.GRB | every 7 days | https://bin.ssec.wisc.edu/pub/eosdb/ancillary/ https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/61/TOAST/ | Total Ozone Analysis Data. | NASA/U. Wisc | Cloudmask_SPA, Aerosol_SPA, L2GEN IPOPP |
|---|
Note - All the ancillary files listed and described in this document are currently available through DRL website. The goal of this document is to provide the alternate source location to retreive the same data.
Note - LAADS link requires user registration to NASA Earthdata forum