MODIS/Aqua Land Surface Temperature/3-Band Emissivity Daily L3 Global 1km SIN Grid Night V006

Metadata Updated: March 23, 2019

MODIS/Aqua Land Surface Temperature/3-Band Emissivity Daily L3 Global 1km SIN Grid Night (MYD21A1N.006).

A new suite of MODIS Land Surface Temperature (LST) and Emissivity products are available in Collection 6. The MYD21 LST algorithm differs from the algorithm of the MYD11 LST products, in that the MYD21 algorithm is based on the ASTER Temperature Emissivity Separation (TES) technique, whereas the MYD11 uses the split-window technique. The MYD21 TES algorithm uses a physics-based algorithm to retrieve dynamically both the LST and Emissivity simultaneously from the three MODIS thermal infrared bands 29, 31, and 32. The TES algorithm is combined with an improved Water Vapor Scaling (WVS) atmospheric correction scheme to stabilize the retrieval during very warm and humid conditions.

The MYD21A1N dataset is produced daily from nighttime Level 2 Gridded (L2G) intermediate LST products. The L2G process maps the daily MYD21 swath granules onto a sinusoidal MODIS grid and stores all observations falling over a gridded cell for a given day. The MOD21A1 algorithm sorts through all these observations for each cell and estimates the final LST value as an average from all observations that are cloud free and have good LST and emissivity 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 MYD21A1N product contains seven Science Datasets (SDS), which include the calculated LST as well as quality control, the three emissivity bands, view zenith angle, and time of observation. Additional details regarding the methodology used to create this Level 3 (L3) product are available in the Algorithm Theoretical Basis Document (https://lpdaac.usgs.gov/sites/default/files/public/product_documentation/mod21_user_guide.pdf).

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.

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Dates

Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019

Metadata Source

Harvested from NASA Data.json

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Browse image for Earthdata Search

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019
Publisher LP DAAC
Unique Identifier C1000000520-LPDAAC_ECS
Maintainer
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Maintainer Email
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 Archived by National Aeronautics and Space Administration, U.S. Government, LP DAAC. https://doi.org/10.5067/MODIS/MYD21A1N.006. This data set was provided by the NASA EOS Project..
Datagov Dedupe Retained 20190322235447
Graphic Preview Description Browse image for Earthdata Search
Graphic Preview File https://e4ftl01.cr.usgs.gov//WORKING/BRWS/Browse.001/2018.10.19/BROWSE.MYD21A1N.A2018266.h16v01.006.2018292123043.1.jpg?_ga=2.113465666.417575848.1539608311-1292697017.1532527375
Harvest Object Id f8b1a319-5216-4de8-b476-41c8b5d7ef8f
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2016-01-20
Homepage URL https://doi.org/10.5067/MODIS/MYD21A1N.006
Language en-US
Metadata Type geospatial
Data Last Modified 2016-01-20
Program Code 026:001
Source Datajson Identifier True
Source Hash e10636d3f2d2c442cb388bb982cab460aac46ae5
Source Schema Version 1.1
Spatial -180.0 -90.0 180.0 90.0
Temporal 2002-05-04T00:00:00Z/2019-02-25T00:00:00Z
Category Aqua, geospatial

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