{"@type": "dcat:Dataset", "accessLevel": "public", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Earthdata Forum", "hasEmail": "mailto:earthdata-support@nasa.gov"}, "description": "The VIIRS Level 1 and Level 2 swath products are generated from the processing of 6 minutes of VIIRS data acquired during the NPP satellite overpass. The VIIRS sensor has 5 high-resolution imagery channels (I-bands) that have 32 detectors (32 rows of pixels per scan), with twice the resolution of the M-bands and the DNB, that span the wavelengths from 0.640 µm to 11.45 µm. The VIIRS on-board calibrator and engineering data product is referred to by it's shortname, VNP02OBC. The VIIRS On Board Calibrator IP file contains space view, solar diffuser, on-board calibrator blackbody (OBCBB) view observations, the associated gain state and HAM side information, and all engineering and housekeeping data, including unscaled data from the Solar Diffuser Stability Monitor (SDSM)/VIIRS Earth View Radiometric Calibration Unit and the Solar Diffuser GEO angles. For additional information, see the Operational Algorithm Description (OAD) Document for the L1B product (http://npp.gsfc.nasa.gov/sciencedocs/2015-08/474-00090_OAD-VIIRS-CAL-GEO-SDR_H.pdf). The document describes how VIIRS operates in space and provides the equations implemented by the L1B software to generate the MODIS Level 1 intermediate products. It is a summary document the presents the formulae and error budges used to transform VIIRS digital counts to radiance and reflectance. file_naming_convention = VNP02OBC.AYYYYDDD.HHMM.CCC.nc AYYYYDDD = Acquisition Year and Day of Year HHMM = Hour and minute of acquisition CCC = Collection number nc = NetCDF5", "distribution": [{"@type": "dcat:Distribution", "conformsTo": "http://www.isotc211.org/2005/gmi", "description": "The metadata's original source.", "downloadURL": "https://cmr.earthdata.nasa.gov/search/concepts/C1410266775-LANCEMODIS.iso19115", "format": "ISO", "mediaType": "text/xml", "title": "Original Metadata"}, {"@type": "dcat:Distribution", "downloadURL": "https://earthdata.nasa.gov/earth-observation-data/near-real-time/download-nrt-data/viirs-nrt", "format": "BIN", "mediaType": "application/octet-stream"}, {"@type": "dcat:Distribution", "downloadURL": "https://nrt3.modaps.eosdis.nasa.gov/archive/allData/5001/VNP02OBC_NRT", "format": "BIN", "mediaType": "application/octet-stream"}], "identifier": "http://dx.doi.org/10.5067/VIIRS/VNP02OBC_NRT.001", "keyword": ["earth-science-platform-characteristics-spectral-engineering", "earth-science-platform-characteristics-spectral-engineering-attitude-characteristics", "earth-science-platform-characteristics-spectral-engineering-flight-data-logs", "earth-science-platform-characteristics-spectral-engineering-orbital-characteristics", "earth-science-platform-characteristics-spectral-engineering-viewing-geometry", "earth-science-sensor-characteristics-spectral-engineering-viewing-geometry"], "landingPage": "http://dx.doi.org/10.5067/VIIRS/VNP02OBC_NRT.001", "license": "https://www.usa.gov/government-works", "modified": "2026-05-11", "programCode": ["026:000"], "publisher": {"@type": "org:Organization", "name": "NASA/GSFC/SED/ESD/BSL/VCST;NASA/GSFC/EOS/ESDIS/LANCE MODIS"}, "spatial": "[\"CARTESIAN\",[{\"WestBoundingCoordinate\":-180.0,\"NorthBoundingCoordinate\":90.0,\"EastBoundingCoordinate\":180.0,\"SouthBoundingCoordinate\":-90.0}]]", "theme": ["Earth Science"], "title": "VIIRS/NPP On Board Calibrator (OBC) IP NRT"}