MODIS/Terra Net Evapotranspiration Gap-Filled 8-Day L4 Global 500m SIN Grid V061
The MOD16A2GF Version 6.1 Evapotranspiration/Latent Heat Flux (ET/LE) product is a year-end gap-filled 8-day composite dataset produced at 500 meter (m) pixel resolution. The algorithm used for the MOD16 data product collection is based on the logic of the Penman-Monteith equation, which includes inputs of daily meteorological reanalysis data along with Moderate Resolution Imaging Spectroradiometer (MODIS) remotely sensed data products such as vegetation property dynamics, albedo, and land cover. The MOD16A2GF will be generated at the end of each year when the entire yearly 8-day MOD15A2H (https://doi.org/10.5067/MODIS/MOD15A2H.061) is available. Hence, the gap-filled MOD16A2GF is the improved MOD16, which has cleaned the poor-quality inputs from 8-day Leaf Area Index and Fraction of Photosynthetically Active Radiation (LAI/FPAR) based on the Quality Control (QC) label for every pixel. If any LAI/FPAR pixel did not meet the quality screening criteria, its value is determined through linear interpolation. However, users cannot get MOD16A2GF in near-real time because it will be generated only at the end of a given year. Provided in the MOD16A2GF product are layers for composited ET, LE, Potential ET (PET), and Potential LE (PLE) along with a quality control layer. Two low resolution browse images, ET and LE, are also available for each MOD16A2GF granule. The pixel values for the two Evapotranspiration layers (ET and PET) are the sum of all eight days within the composite period, and the pixel values for the two Latent Heat layers (LE and PLE) are the average of all eight days within the composite period. The last acquisition period of each year is a 5- or 6-day composite period, depending on the year. Validation at stage 1 (https://landweb.modaps.eosdis.nasa.gov/cgi-bin/QA_WWW/newPage.cgi?fileName=maturity) has been achieved for MODIS Evapotranspiration products. Improvements/Changes from Previous Versions * The Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and corrections to the Terra MODIS forward look-up table (LUT) update for the period 2012 - 2017. * A polarization correction has been applied to the L1B Reflective Solar Bands (RSB). * The product uses Climatology LAI/FPAR as back up to the operational LAI/FPAR.
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| Spatial Extent: | Bounding Rectangle: N: 90.0 S: -90.0 E: 180.0 W: -180.0 |
Data Format(s): | Distribution: HDF-EOS2 |
| Temporal Extent: | Platform(s): | Terra | |
| Data Center(s): | LP DAAC | Instrument(s): | MODIS |
| Version: | 061 | ||
- Title: MODIS/Terra Net Evapotranspiration Gap-Filled 8-Day L4 Global 500m SIN Grid V061
- Creator: Steven Running, Qiaozhen Mu, Maosheng Zhao, Alvaro Moreno
- Publisher: NASA EOSDIS Land Processes DAAC
- Release Date: 2021-03-15T00:00:00.000Z
- Other Citation Details: The DOI landing page provides citations in APA and Chicago styles.
- Linkage: https://doi.org/10.5067/MODIS/MOD16A2GF.061
10.5067/MODIS/MOD16A2GF.061
https://doi.org
- USER'S GUIDE: https://lpdaac.usgs.gov/documents/931/MOD16_User_Guide_V61.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/93/MOD16_ATBD.pdf, The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
- GENERAL DOCUMENTATION: https://ladsweb.modaps.eosdis.nasa.gov/filespec/MODIS/6/MOD16A2GF, The File Specification provides a description of the product file including Scientific Data Sets and their attributes.
Collection Information
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Purpose
Science Research -
Version Description
Collection Version 6.1 Processing and Reprocessing - Search for granules from this collection
Data Identification
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Processing Level
4
GRID
- Quality
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Collection Progress
Active
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Access Constraints
None
Data Dates
| Creation | |
| Last Revision |
Related URLs
Other Descriptive Keywords
Additional Attributes
- Name: HORIZONTALTILENUMBER INT Description: Horizontal tile number of a grid, which increases from left to right.
- Name: NDAYS_COMPOSITED INT Description: Number of days of the data that have been composited.
- Name: QAPERCENTGOODQUALITY INT Description: Percent of pixels with good quality
- Name: QAPERCENTOTHERQUALITY INT Description: Percent of pixels with not so good quality
- Name: VERTICALTILENUMBER INT Description: Vertical tile number of a grid, which increases from top to bottom.
- Name: TileID INT Description: MODIS Land tile identification number which represents a geographical area on the surface of the Earth bounded by latitude and longitude coordinates.
- Name: PROCESSVERSION STRING Description: Version of the process software that generated the product.
- Name: QAPERCENTGOODPSN INT Description: Percent of pixels with good Net Photosynthesis (PSN) quality
- Name: QAPERCENTGOODNPP INT Description: Percent of pixels with good Net Primary Production (NPP) quality
- 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
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| Terra |
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No dates provided. |
Temporal Information
Spatial Information
Gridded Resolutions
Gridded Resolution 1
X Dimension500.0 Meters
Y Dimension500.0 Meters
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | MODIS Sinusoidal Tiling System | CARTESIAN | GEODETIC |
Resolution and Coordinate System
Horizontal Data Resolution
Tiling Identification Systems
| System Name | Coordinate 1 Min | Coordinate 1 Max | Coordinate 2 Min | Coordinate 2 Max |
|---|---|---|---|---|
| MODIS Tile SIN | 0.0 | 35.0 | 0.0 | 17.0 |
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, 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/MODAPS
PROCESSORMODIS 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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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-EOS2
Format Type: Native
Format Description: Hierarchical Data Format - Earth Observing System Version 2
Media: HTTP
Average File Size: 5.0 MB
Total Collection File Size Begin Date: 2001-01-01T00:00:00.000Z
File Distribution Information
There is no direct distribution information for this collection.