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.
Science Keywords: |
|
||
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 |
10.5067/VIIRS/VNP43MA4N.001
Creation |
3
Active
None. See disclaimer: https://earthdata.nasa.gov/data/near-real-time-data/about-lance/disclaimer
No constraints but users need to be registered with the ESDIS User Registration system (https://urs.eosdis.nasa.gov/users/new) to download files.
Project Short Name | Campaigns | Project Dates |
---|---|---|
LANCE | No campaigns listed. | No dates provided. |
SUOMI-NPP | No campaigns listed. | No dates provided. |
Coverage Type | Zone Identifier | Geometry | Granule Representation |
---|---|---|---|
HORIZONTAL | CARTESIAN | GEODETIC |
1 Kilometers
1 Kilometers
This data center does not have any addresses listed.
This data center does not have any contact mechanisms listed.
This contact does not have any addresses listed.
University of Massachusetts Boston
Boston,
MA
02125
This contact does not have any contact mechanisms listed.
This contact does not have any addresses listed.
Format: HDF 5
Format Type: Native
Media: Online (https)
Fees: No Fee