Description
The Visible Infrared Imaging Radiometer Suite (VIIRS) (https://lpdaac.usgs.gov/dataset_discovery/viirs) daily surface reflectance (VNP09GA) Version 1 product provides an estimate of land surface reflectance from the Suomi National Polar-Orbiting Partnership (Suomi NPP) VIIRS sensor. Data are provided for three imagery bands (I1-I3) at nominal 500 meter resolution (~ 463 meter) and nine moderate resolution bands (M1-M5, M7, M8, M10, M11) at nominal 1 kilometer (~926 meter) resolution. The 500 meter and 1 kilometer datasets are derived through resampling the native 375 meter and 750 meter VIIRS resolutions, respectively, in the Level 2 input product. These bands are corrected for atmospheric conditions such as the effects of molecular gases, including ozone and water vapor, and for the effects of atmospheric aerosols.
The inputs to the surface reflectance algorithm are top-of-atmosphere reflectance for the VIIRS visible bands, the VIIRS cloud mask and aerosol product, aerosol optical thickness and atmospheric data obtained from the NOAA National Centers for Environmental Prediction (NCEP) reanalysis system. Along with the twelve reflectance bands are reflectance band quality, sensor azimuth angle, solar azimuth angle, sensor zenith angle, solar zenith angle, and observations layers. The reflectance layers from the VNP09GA data product are used as input data for many of the VIIRS land products.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| This dataset's landing page | HTML | The LP DAAC product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc. | Open resource |
| Download this dataset through a directory map | HTML | LP DAAC Data Pool provides direct access to available products via HTTPS. | Open resource |
| Get a related visualization | HTML | Browse image for Earthdata Search | Open resource |
| Download this dataset through USGS Earth Explorer | HTML | USGS EarthExplorer provides users the ability to query, search, and order products available from the LP DAAC. | Open resource |
| View this dataset's science data product validation documentation | HTML | Further details regarding VIIRS product validation and maturity status are available from VIIRS Land Product Quality Assessment site. | Open resource |
| View this dataset's product quality assessment | HTML | Quality Assessment provides information regarding the usability and usefulness of the data product. | Open resource |
| Download this dataset through APPEEARS | HTML | The Application for Extracting and Exploring Analysis Ready Samples (AρρEEARS) offers a simple and efficient way to perform data access and transformation processes. | Open resource |
| The dataset's project home page | HTML | The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products. | Open resource |
| View this dataset's algorithm theoretical basis document | The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. | Open resource | |
| View this dataset's user's guide | The technical information in the Version 1.1 User's Guide enables users to interpret and use the data products. | Open resource | |
| View this dataset's user's guide | The technical information in the Version 1.6 User's Guide enables users to interpret and use the data products. | Open resource | |
| Use OPeNDAP to access the dataset's data | HTML | OPeNDAP provides direct access to data via HTTPS. | Open resource |
| Google Scholar search results | HTML | Search results for publications that cite this dataset by its DOI. | Open resource |
| Download this dataset through Earthdata Search | HTML | Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data. | Open resource |
| View this dataset's science data product validation documentation | HTML | Validation at stage 1 has been achieved for the VIIRS surface reflectance product suite. | Open resource |