Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

MODIS/Aqua Net Evapotranspiration Gap-Filled 8-Day L4 Global 500m SIN Grid V061

Metadata Updated: June 4, 2024

The MYD16A2GF 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 improved algorithm 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 MYD16A2GF will be generated at the end of each year when the entire yearly 8-day MYD15A2H (https://doi.org/10.5067/MODIS/MYD15A2H.061) is available. Hence, the gap-filled MYD16A2GF is the improved MYD16, 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 MYD16A2GF in near-real time because it will be generated only at the end of a given year.

Provided in the MYD16A2GF 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 MYD16A2GF 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.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date April 27, 2023
Metadata Updated Date June 4, 2024

Metadata Source

Harvested from NASA Data.json

Graphic Preview

Browse image for Earthdata Search

Additional Metadata

Resource Type Dataset
Metadata Created Date April 27, 2023
Metadata Updated Date June 4, 2024
Publisher LP DAAC
Maintainer
Identifier C2565794067-LPCLOUD
Data First Published 2021-03-15
Language en-US
Data Last Modified 2021-03-15
Category Aqua, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Steve Running, Qiaozhen Mu, Maosheng Zhao, Alvaro Moreno. 2021-03-15. MODIS/Aqua Net Evapotranspiration Gap-Filled 8-Day L4 Global 500m SIN Grid V061. Sioux Falls, South Dakota, USA. Archived by National Aeronautics and Space Administration, U.S. Government, NASA EOSDIS Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MYD16A2GF.061. https://doi.org/10.5067/MODIS/MYD16A2GF.061. The DOI landing page provides citations in APA and Chicago styles..
Creator Steve Running, Qiaozhen Mu, Maosheng Zhao, Alvaro Moreno
Graphic Preview Description Browse image for Earthdata Search
Graphic Preview File https://cmr.earthdata.nasa.gov/browse-scaler/browse_images/granules/G2638841639-LPCLOUD?h=85&w=85
Harvest Object Id 3aa7b42f-19db-4514-8b62-f877a24b74e7
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.5067/MODIS/MYD16A2GF.061
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Release Place Sioux Falls, South Dakota, USA
Source Datajson Identifier True
Source Hash efa1b630adb9094bd778cbfd4de34fd617472e8a3e6c08fdb2476adb6ee9612c
Source Schema Version 1.1
Spatial
Temporal 2002-01-01T00:00:00Z/2024-06-03T00:00:00Z

Didn't find what you're looking for? Suggest a dataset here.