VIIRS/NPP Nadir BRDF-Adjusted Reflectance Daily L3 Global 1 km SIN Grid NRT
The VIIRS/NPP Nadir BRDF-Adjusted Reflectance Daily L3 Global 1 km SIN Grid NRT (VNP43MA4N) product provides NBAR estimates at 1 kilometer (km) resolution. The VNP43MA4N product is produced daily using 16-day VIIRS data (i.e., the current day and the previous 15 days). The view angle effects are removed from the directional reflectances resulting in a stable and consistent NBAR product. The VNP43 algorithm uses the RossThick/Li-Sparse-Reciprocal (RTLSR) semi-empirical kernel-driven BRDF model, with the three kernel weights from VNP43MA1N to reconstruct surface anisotropic effects, correcting the directional reflectance to a common view geometry (VNP43MA4N), while also computing integrated black-sky albedo (BSA) at local solar noon and white-sky albedo (WSA) (VNP43MA3N). Researchers can use the BRDF model parameters with a simple polynomial, to obtain black-sky albedo at any solar illumination angle. Likewise, both the BSA and WSA Science Dataset (SDS) layers can be used with a simple polynomial, to manually estimate instantaneous actual albedo (blue-sky albedo). Additional details regarding the methodology are available in the Algorithm Theoretical Basis Document (ATBD) at https://lpdaac.usgs.gov/sites/default/files/public/product_documentation/vnp43_v1_atbd.pdf. The VNP43MA4N product includes 18 SDS layers for BRDF/Albedo mandatory quality and nadir reflectance for VIIRS nine moderate bands M1-M5, M7-M8, and M10-M11.
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| Spatial Extent: | Bounding Rectangle: N: 80.0 S: -80.0 E: 180.0 W: -180.0 |
Data Format(s): | Distribution: HDF 5 |
| Temporal Extent: | Platform(s): | SUOMI-NPP | |
| Data Center(s): | NASA/GSFC/SED/ESD/TISL/MODAPS | Instrument(s): | VIIRS |
| Version: | 1 | ||
- Title: VIIRS/NPP Nadir BRDF-Adjusted Reflectance Daily L3 Global 1 km SIN Grid NRT
- Version: 1
- Creator: LANCEMODIS
- Publisher: LANCEMODIS
- Release Date: 2019-01-01T00:00:00.000Z
- Linkage: http://doi.org/10.5067/VIIRS/VNP43MA4N.001
- 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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DOI
10.5067/VIIRS/VNP43MA4N.001
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 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.
Data Dates
| Creation |
Other Descriptive Keywords
Ancillary Keywords
- Near Real Time (NRT)
- LANCE
- RELATIVE_START_DATE: -8
ISO Topic Categories
- ENVIRONMENT
- GEOSCIENTIFIC INFORMATION
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| LANCE | No campaigns listed. | No dates provided. |
| SUOMI-NPP | No campaigns listed. | No dates provided. |
Temporal Information
Spatial Information
Generic Resolutions
Generic Resolution 1
X Dimension1 Kilometers
Y Dimension1 Kilometers
| 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/TISL/MODAPS
ARCHIVERMODIS Adaptive Processing System, Terrestrial Information Systems 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.
Data Contacts
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LANCEMODIS
Technical ContactLANCEMODIS
This contact does not have any addresses listed.
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C. SCHAAF
InvestigatorC. SCHAAF
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University of Massachusetts Boston
Boston, MA 02125
This contact does not have any contact mechanisms listed.
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NASA LANCE SUPPORT
Data Center ContactNASA LANCE SUPPORT
NASA/GSFC/SED/ESD/TISL/MODAPSThis contact does not have any addresses listed.
Archive And Distribution Information
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Format: HDF 5
Format Type: Native
Media: Online (https)
Fees: No Fee