VIIRS/NPP On Board Calibrator (OBC) IP NRT
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
| Science Keywords: |
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| Spatial Extent: | Bounding Rectangle: N: 90.0 S: -90.0 E: 180.0 W: -180.0 |
Data Format(s): | Distribution: NetCDF5 |
| Temporal Extent: | Platform(s): | SUOMI-NPP | |
| Data Center(s): | NASA/GSFC/SED/ESD/BSL/VCST | Instrument(s): | VIIRS |
| Version: | 1 | ||
- Title: VIIRS/NPP On Board Calibrator (OBC) IP NRT
- Version: 1
- Creator: VCST Team
- Publisher: LANCEMODIS
- Release Date: 2017-07-01T00:00:00.000Z
- Linkage: https://earthdata.nasa.gov/earth-observation-data/near-real-time/download-nrt-data/viirs-nrt
- GENERAL DOCUMENTATION: https://earthdata.nasa.gov/earth-observation-data/near-real-time/download-nrt-data/viirs-nrt, NASA LANCE Near Real Time Data Product Information
Collection Information
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Version Description
S-NPP VIIRS NRT Version 1 Data -
DOI
http://dx.doi.org/10.5067/VIIRS/VNP02OBC_NRT.001
- Search for granules from this collection
Data Identification
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Processing Level
1B
- Quality This is a near real-time (NRT) product that has undergone expedited processing to make it available within 3 hours of observation time to meet the needs of the NRT applications community. NRT data are subject to geolocation errors or reprocessing. Usually the geolocationalerrors are minimal (less than 100 meters), however, there are situations, particularly before and after spacecraft maneuvers and during space weather events, when the difference can increase up to several kilometers.
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Collection Progress
Active
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Use Constraints
None. See disclaimer: https://earthdata.nasa.gov/data/near-real-time-data/about-lance/disclaimer
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Access Constraints
No constraints but users need to be registered with the ESDIS User Registration system (https://urs.eosdis.nasa.gov/users/new) to download files via the download site.
Data Dates
| Creation |
Other Descriptive Keywords
Ancillary Keywords
- Near Real Time (NRT)
- LANCE
- RELATIVE_START_DATE: -8
ISO Topic Categories
- IMAGERY/BASE MAPS/EARTH COVER
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| SUOMI-NPP | No campaigns listed. | No dates provided. |
| LANCE | No campaigns listed. | No dates provided. |
Temporal Information
Spatial Information
Generic Resolutions
Generic Resolution 1
X Dimension750 Not provided
Y Dimension750 Not provided
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | CARTESIAN | GEODETIC |
Resolution and Coordinate System
Horizontal Data Resolution
Location Keywords
- GEOGRAPHIC REGION
- GLOBAL
Data Centers
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NASA/GSFC/SED/ESD/BSL/VCST
ORIGINATORVIIRS Characterization Support Team (MCST), Biospheric Sciences Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
This data center does not have any addresses listed.
This data center does not have any contact mechanisms listed.
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NASA/GSFC/EOS/ESDIS/LANCE MODIS
DISTRIBUTORLand, Atmosphere Near real-time Capability for EOS (LANCE) Moderate Resolution Imaging Spectroradiometer (MODIS)
This data center does not have any addresses listed.
This data center does not have any contact mechanisms listed.
Data Contacts
Archive And Distribution Information
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Format: NetCDF5
Format Type: Native
Media: Online (HTTP)
Fees: No Fee