VIIRS/NPP Land Surface Temperature/Emissivity Daily L3 Global 1km SIN Grid Night V001
The NASA Suomi National Polar-Orbiting Partnership (Suomi NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Land Surface Temperature and Emissivity (LST&E) Night Version 1 product (VNP21A1N) is compiled daily from nighttime Level 2 Gridded (L2G) intermediate products. The L2G process maps the daily (VNP21) (https://doi.org/10.5067/VIIRS/VNP21.001) swath granules onto a sinusoidal MODIS grid and stores all observations overlapping a gridded cell for a given night. The VNP21A1 algorithm sorts through all these observations for each cell and estimates the final LST value as an average from all cloud-free observations that have good LST accuracies. The nighttime average is weighted by the observation coverage for that cell. Only observations having observation coverage more than a certain threshold (15%) are considered for this averaging. The 1 kilometer dataset is derived through resampling the native 750 meter VIIRS resolution in the input product. The VNP21A1N product is developed synergistically with the Moderate Resolution Imaging Spectroradiometer (MODIS) LST&E Version 6 product (MOD21A1N) (https://doi.org/10.5067/MODIS/MOD21A1N.006) using the same input atmospheric products and algorithmic approach. The overall objective for NASA VIIRS products is to ensure the algorithms and products are compatible with the MODIS Terra and Aqua algorithms to promote the continuity of the Earth Observation System (EOS) mission. Additional details regarding the method used to create this Level 3 (L3) product are available in the Algorithm Theoretical Basis Document (ATBD) (https://lpdaac.usgs.gov/documents/428/VNP21_ATBD_V1.pdf). VIIRS LST&E products are available 2 months after acquisition due to latency of data inputs. The VNP21A1N product contains seven Science Datasets (SDS): LST, quality control, emissivity for bands M14, M15, and M16, view zenith angle, and time of observation. A low-resolution browse image for LST is also available for each VNP21A1N granule.
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| Spatial Extent: | Bounding Rectangle: N: 90.0 S: -90.0 E: 180.0 W: -180.0 |
Data Format(s): | Archive: HDF-EOS5Distribution: HDF-EOS5 |
| Temporal Extent: | Platform(s): | Suomi-NPP | |
| Data Center(s): | LP DAAC | Instrument(s): | VIIRS |
| Version: | 001 | ||
- Title: VIIRS/NPP Land Surface Temperature/Emissivity Daily L3 Global 1km SIN Grid Night V001
- Version: 001
- Creator: Glynn Hulley, Simon Hook
- Publisher: NASA EOSDIS Land Processes DAAC
- Release Date: 2019-07-09T00:00:00.000Z
- Other Citation Details: This data set was provided by the NASA/NOAA NPP Project. The DOI landing page provides citations in APA and Chicago styles.
- Linkage: https://doi.org/10.5067/VIIRS/VNP21A1N.001
10.5067/VIIRS/VNP21A1N.001
https://doi.org
- USER'S GUIDE: https://lpdaac.usgs.gov/documents/429/VNP21_User_Guide_V1.pdf, The technical information in the User's Guide enables users to interpret and use the data products.
- ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD): https://lpdaac.usgs.gov/documents/428/VNP21_ATBD_V1.pdf, The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
- SCIENCE DATA PRODUCT VALIDATION: https://viirsland.gsfc.nasa.gov/Val/LSR_Val.html, Validation at stage 1 has been achieved for the VIIRS land surface temperature product suite.
- SCIENCE DATA PRODUCT VALIDATION: https://landweb.modaps.eosdis.nasa.gov/cgi-bin/NPP_QA/NPPpage.cgi?fileName=maturity&subdir=forPage#, Further details regarding VIIRS product validation and maturity status are available from VIIRS Land Product Quality Assessment site.
- SCIENCE DATA PRODUCT VALIDATION: https://viirsland.gsfc.nasa.gov/Val/LST_Val.html, Validation at stage 1 has been achieved for the VIIRS land surface temperature product suite.
- SCIENCE DATA PRODUCT VALIDATION: https://landweb.modaps.eosdis.nasa.gov/cgi-bin/NPP_QA/NPPpage.cgi?fileName=maturity&subdir=forPage#, Further details regarding VIIRS product validation and maturity status are available from VIIRS Land Product Quality Assessment site.
Collection Information
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Purpose
Science Research -
Version Description
Collection Version 1 Processing and Reprocessing - Search for granules from this collection
Data Identification
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Processing Level
3
Sensor Measurements
- Quality
-
Collection Progress
Active
-
Access Constraints
None
Data Dates
| Creation | |
| Last Revision |
Related URLs
Other Descriptive Keywords
Additional Attributes
- Name: identifier_product_doi STRING Description: Digital object identifier that uniquely identifies this data product
- Name: identifier_product_doi_authority STRING Description: URL of the digital object identifier resolving authority
- Name: TileID INT Description: VIIRS Land tile identification number which represents a geographical area on the surface of the Earth bounded by latitude and longitude coordinates.
- Name: HORIZONTALTILENUMBER INT Description: VIIRS Horizontal tile number of a grid, which increases from left to right.
- Name: VERTICALTILENUMBER INT Description: VIIRS Vertical tile number of a grid, which increases from top to bottom.
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| NPP-JPSS |
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No dates provided. |
Temporal Information
Spatial Information
Gridded Resolutions
Gridded Resolution 1
X Dimension1000.0 Meters
Y Dimension1000.0 Meters
| 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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LP DAAC
ARCHIVERLand Processes Distributed Active Archive Center
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U.S. Geological Survey, Earth Resources Observation and Science (EROS) Center
Sioux Falls, South Dakota 57198
M-F, 8 a.m. to 4 p.m. Central Time
605-594-6116
866-573-3222
Contact DetailsLP DAAC User Services is the point of contact for answering questions concerning data products, data access, and online applications.
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
https://lpdaac.usgs.gov/
- Home Page
-
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NASA/GSFC/SED/ESD/TISL/LandSIPS
PROCESSORLand Science Investigator-led Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Sciences 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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LP DAAC User Services
User ServicesLP DAAC User Services
LP DAAC-
U.S. Geological Survey, Earth Resources Observation and Science (EROS) Center
Sioux Falls, South Dakota 57198
M-F, 8 a.m. to 4 p.m. Central Time
605-594-6116
866-573-3222
Contact DetailsLP DAAC User Services is the point of contact for answering questions concerning data products, data access, and online applications.
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
https://lpdaac.usgs.gov/
- Home Page
-
Archive And Distribution Information
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Format: HDF-EOS5
Format Type: Native
Average File Size: 1.0 MB
Total Collection File Size Begin Date: 2012-01-19T00:00:00.000Z
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Format: HDF-EOS5
Format Type: Native
Media: https
Average File Size: 1.0 MB
Total Collection File Size Begin Date: 2012-01-19T00:00:00.000Z
File Archive Information
File Distribution Information
There is no direct distribution information for this collection.