Short Name:

MYD21

MODIS/Aqua Land Surface Temperature/3-Band Emissivity 5-Min L2 1km V006

The MYD21 Land Surface Temperature and Emissivity (LST&E) swath data product is produced daily in five minute temporal increments of satellite acquisition. The swath is approximately 2,030 pixels along track and 1,354 pixels per line, at a nadir resolution of 1,000 meters. The MYD21 Land Surface Temperature (LST) algorithm differs from the (MYD11) (https://doi.org/10.5067/modis/myd11_l2.006) algorithm in that the MYD21 LST 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 dynamically retrieve both 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. MYD21 products are available two months after acquisition due to latency of data inputs. Additional details regarding the method used to create this Level 2 (L2) product are available in the Algorithm Theoretical Basis Document (ATBD) (https://lpdaac.usgs.gov/documents/107/MOD21_ATBD.pdf).

Overview Download Data Services Tools Citation Information Documentation Additional Information

Science Keywords:

Spatial Extent:

Bounding Rectangle:

N: 90.0 S: -90.0 E: 180.0 W: -180.0

Data Format(s):

Archive: HDF-EOSDistribution: HDF-EOS

Temporal Extent:

2002-05-04 to now

Platform(s):

Aqua

Data Center(s):

LP DAAC

Instrument(s):

MODIS

Version:

006

Download Options

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Title: MODIS/Aqua Land Surface Temperature/3-Band Emissivity 5-Min L2 1km V006
Version: 006
Creator: Glynn Hulley
Publisher: NASA EOSDIS Land Processes DAAC
Release Date: 2017-09-21T00:00:00.000Z
Other Citation Details: The DOI landing page provides citations in APA and Chicago styles.
Linkage: https://doi.org/10.5067/MODIS/MYD21.006

USER'S GUIDE: https://lpdaac.usgs.gov/documents/108/MOD21_User_Guide_V6.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/107/MOD21_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/MYD21, The File Specification provides a description of the product file including Scientific Data Sets and their attributes.

Purpose
Science Research
Version Description
Collection Version 6 Processing and Reprocessing
DOI
10.5067/MODIS/MYD21.006

https://doi.org/
Search for granules from this collection

Data Dates

Creation	2013-07-17T10:10:58.863Z
Last Revision	2017-04-10T09:35:54.892Z

Processing Level

Sensor Measurements

Quality

Collection Progress
Active
Access Constraints

None

Related URLs

Additional Attributes

Name: GRANULENUMBER INT Description: The number of the granule for the day starting at midnight. Example: The granule from 00:00:00 to 00:00:05 will be granule number 1. The granule from 00:01:00 to 00:01:05 will be granule number 13
Name: QAFRACTIONGOODQUALITY FLOAT Description: Fraction of pixels with good quality of product
Name: QAFRACTIONNOTPRODUCEDCLOUD FLOAT Description: Fraction of pixels without product due to cloud
Name: QAFRACTIONNOTPRODUCEDOTHER FLOAT Description: Fraction of pixels without product due to reasons other than cloud
Name: QAFRACTIONOTHERQUALITY FLOAT Description: Fraction of pixels with not so good quality of product
Name: QAPERCENTGOODQUALITY INT Description: Percent of pixels with good quality
Name: QAPERCENTNOTPRODUCEDCLOUD INT Description: Percent of pixels under cloud
Name: QAPERCENTNOTPRODUCEDOTHER INT Description: Percent of pixels not produced due to some reason other than cloud
Name: QAPERCENTOTHERQUALITY INT Description: Percent of pixels with not so good quality
Name: PROCESSVERSION STRING Description: Version of the process software that generated the product.
Name: CLOUD_CONTAMINATED_LST_SCREENED STRING Description: Indicator of whether cloud-contaminated Land Surface Temperature values are screened off.
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: SNOWCOVERPERCENT INT Description: Percent of pixels with snow cover

Projects

Project Short Name	Campaigns	Project Dates
Aqua	Aqua	No dates provided.

Coverage Type	Zone Identifier	Geometry	Granule Representation
HORIZONTAL		CARTESIAN	GEODETIC

Resolution and Coordinate System

Horizontal Data Resolution

Generic Resolutions
- Generic Resolution 1
  X Dimension
  1000.0 Meters
  Y Dimension
  1000.0 Meters

Location Keywords

- GEOGRAPHIC REGION
- GLOBAL

LP DAAC
ARCHIVER

Land Processes Distributed Active Archive Center
- 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

Email
Contact Details
LP 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
NASA/GSFC/SED/ESD/TISL/MODAPS
PROCESSOR

MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
- NASA/GSFC Code 922
  GREENBELT, Maryland 20771
301-614-5515

Email
Contact Details
Contact for data content concerns
https://modaps.modaps.eosdis.nasa.gov/

Home Page

LP DAAC User Services
User Services

LP 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

Email
Contact Details
LP 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

Metadata Dates

Creation	2017-09-18T12:04:00.000Z
Last Revision	2021-03-22T13:35:00.000Z

File Archive Information

Format: HDF-EOS

Format Type: Native

Average File Size: 3.99 MB

Total Collection File Size Begin Date: 2002-07-04T00:00:00.000Z

File Distribution Information

Format: HDF-EOS

Format Type: Native

Media: https

Average File Size: 3.99 MB

Total Collection File Size Begin Date: 2002-07-04T00:00:00.000Z

CMR Search

MODIS/Aqua Land Surface Temperature/3-Band Emissivity 5-Min L2 1km V006

Collection Information

Data Identification

Data Dates

Related URLs

Other Descriptive Keywords

Additional Attributes

Acquisition Information

Projects

Temporal Information

Spatial Information

Resolution and Coordinate System

Horizontal Data Resolution

Generic Resolutions

Generic Resolution 1

Location Keywords

Data Centers

LP DAAC

Land Processes Distributed Active Archive Center

NASA/GSFC/SED/ESD/TISL/MODAPS

MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Contacts

LP DAAC User Services

LP DAAC User Services

Metadata Dates

Archive And Distribution Information

File Archive Information

File Distribution Information