VIIRS/NPP Daily Gridded Day Night Band 500m Linear Lat Lon Grid Night NRT
The first of two VIIRS DNB-based Near Real Time (NRT) datasets is a daily, top-of-atmosphere, at-sensor nighttime radiance product called VIIRS/NPP Daily Gridded Day Night Band 500m Linear Lat Lon Grid Night. Known by its short-name, VNP46A1_NRT, this product contains 26 Science Data Sets (SDS) that include sensor radiance, zenith and azimuth angles (at-sensor, solar, and lunar), cloud-mask flags, time, shortwave IR radiance, brightness temperatures, VIIRS quality flags, moon phase angle, and moon illumination fraction. It also provides Quality Flag (QF) information specific to the cloud-mask, VIIRS moderate-resolution bands M10, M11, M12, M13, M15, M16, and DNB.
| 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): | Archive: HDF5Distribution: HDF5 |
| Temporal Extent: | Platform(s): | SUOMI-NPP | |
| Data Center(s): | NASA/GSFC/EOS/ESDIS/LANCE MODIS | Instrument(s): | VIIRS |
| Version: | 1 | ||
- Title: VIIRS/NPP Daily Gridded Day Night Band 500m Linear Lat Lon Grid Night NRT
- Version: 1
- Creator: VIIRS Land SIPS
- Publisher: LANCEMODIS
- Release Date: 2020-12-31T00:00:00.000Z
- Linkage: https://earthdata.nasa.gov/earth-observation-data/near-real-time/download-nrt-data/viirs-nrt
Collection Information
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Purpose
To provide VIIRS 500m Gridded Day Night Band in Near Real-Time. -
DOI
10.5067/VIIRS/VNP46A1_NRT.001
https://doi.org
- Search for granules from this collection
Data Identification
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Processing Level
3
- 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 geolocational errors 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.
Data Dates
| Creation |
Metadata Associations
| Association Type | Entry ID | Description | Version |
|---|---|---|---|
| Science Associated | VNP46A1_1 |
Related URLs
Other Descriptive Keywords
Ancillary Keywords
- Near Real Time (NRT)
- Nighttime Lights
- at-Sensor TOA Nighttime Radiance
- RELATIVE_START_DATE: -8
Additional Attributes
- Name: TileId INT Description: Id for each data tile.
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| SUOMI-NPP | No campaigns listed. | No dates provided. |
Temporal Information
Temporal Keywords
- Daily - < Weekly
Spatial Information
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | CARTESIAN | GEODETIC |
Location Keywords
- GEOGRAPHIC REGION
- GLOBAL
Data Centers
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NASA/GSFC/EOS/ESDIS/LANCE MODIS
ARCHIVERLand, Atmosphere Near real-time Capability for EOS (LANCE) Moderate Resolution Imaging Spectroradiometer (MODIS)
Data Contacts
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LANCE-MODIS Users Services
Technical ContactLANCE-MODIS Users Services
NASA/GSFC/EOS/ESDIS/LANCE MODISThis contact does not have any addresses listed.
Archive And Distribution Information
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Format: HDF5
Format Type: Native
Average File Size: 35.0 MB
Total Collection File Size Begin Date: 2020-12-31T00:00:00.000Z
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Format: HDF5
Format Type: Native
Media: Online
Average File Size: 35.0 MB
Total Collection File Size Begin Date: 2020-12-31T00:00:00.000Z
Fees: None