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

Metadata Updated: November 5, 2019

A new suite of Moderate Resolution Imaging Spectroradiometer (MODIS) Land Surface Temperature and Emissivity (LST&E) products are available in Collection 6. The MOD21 Land Surface Temperatuer (LST) algorithm differs from the algorithm of the (MOD11) (https://doi.org/10.5067/modis/mod11_l2.006) LST products, in that the MOD21 algorithm is based on the ASTER Temperature/Emissivity Separation (TES) technique, whereas the MOD11 uses the split-window technique. The MOD21 TES algorithm uses a physics-based algorithm to dynamically retrieve both the LST and spectral emissivity simultaneously from the 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 MOD21A2 dataset is an 8-day composite LST product that uses an algorithm based on a simple averaging method. The algorithm calculates the average from all the cloud free (MOD21A1D) (http://dx.doi.org/10.5067/MODIS/MOD21A1D.006) and (MOD21A1N) (http://dx.doi.org/10.5067/MODIS/MOD21A1N.006) daily acquisitions from the 8-day period. Unlike the MOD21A1 data sets where the daytime and nighttime acquisitions are separate products, the MOD21A2 contains both daytime and nighttime acquisitions as separate Science Dataset (SDS) layers within a single Hierarchical Data Format (HDF) file. The LST, Quality Control (QC), view zenith angle, and viewing time have separate day and night SDS layers, while the values for the MODIS emissivity bands 29, 31, and 32 are the average of both the nighttime and daytime acquisitions. MOD21A2 products are available two months after acquisition due to latency of data inputs. 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/107/MOD21_ATBD.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 November 5, 2019

Metadata Source

Harvested from NASA Data.json

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Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date November 5, 2019
Publisher LP DAAC
Unique Identifier C1000000521-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 This data set was provided by the NASA EOS Project.
Graphic Preview Description Browse image for Earthdata Search
Graphic Preview File https://e4ftl01.cr.usgs.gov//WORKING/BRWS/Browse.001/2018.10.15/BROWSE.MOD21A1N.A2005364.h10v06.006.2018286112320.1.jpg?_ga=2.171802848.116070394.1561987039-1109527761.1561753117
Harvest Object Id 35a5efe6-b576-42e5-b378-6bfa2c09a1d0
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/MOD21A1N.006
Language en-US
Metadata Type geospatial
Data Last Modified 2016-01-20
Program Code 026:001
Source Datajson Identifier True
Source Hash 7f8bdfe75227a380cd2a183ee912a2e8790d7ce9
Source Schema Version 1.1
Spatial -180.0 -90.0 180.0 90.0
Temporal 1999-12-18T00:00:00Z/2019-11-04T00:00:00Z
Category Terra, geospatial

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