MODIS/Aqua Land Surface Temperature/3-Band Emissivity 5-Min L2 1km V061
The MYD21 Version 6.1 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_l2.061) 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)). Validation at stage 1 (https://modis-land.gsfc.nasa.gov/MODLAND_val.html) has been achieved for the MODIS Land Surface Temperature and Emissivity data products. Further details regarding MODIS land product validation for the MYD21 data products are available from the MODIS Land Team Validation site (https://modis-land.gsfc.nasa.gov/ValStatus.php?ProductID=MOD21). 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 utilizes GEOS data replacing MERRA2. * Three new CMG products are available in the MxD21 suite (MxD21C1/C2/C3).
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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-EOS |
| Temporal Extent: | Platform(s): | Aqua | |
| Data Center(s): | LP DAAC | Instrument(s): | MODIS |
| Version: | 061 | ||
- Title: MODIS/Aqua Land Surface Temperature/3-Band Emissivity 5-Min L2 1km V061
- Creator: Glynn Hulley
- Publisher: NASA EOSDIS Land Processes DAAC
- Release Date: 2021-02-08T00:00:00.000Z
- Other Citation Details: The DOI landing page provides citations in APA and Chicago styles.
- Linkage: https://doi.org/10.5067/MODIS/MYD21.061
- USER'S GUIDE: https://lpdaac.usgs.gov/documents/620/MOD21_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/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.
Collection Information
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Purpose
Science Research -
Version Description
Collection Version 6.1 Processing and Reprocessing -
DOI
10.5067/MODIS/MYD21.061
https://doi.org/
- Search for granules from this collection
Data Identification
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Processing Level
2
Sensor Measurements
- 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: 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
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| Aqua |
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No dates provided. |
Temporal Information
Spatial Information
Generic Resolutions
Generic Resolution 1
X Dimension1000.0 Meters
Y Dimension1000.0 Meters
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | CARTESIAN | GEODETIC |
Resolution and Coordinate System
Horizontal Data Resolution
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, 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
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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
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NASA/GSFC Code 922
GREENBELT, Maryland 20771
301-614-5515
Contact DetailsContact for data content concerns
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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-EOS
Format Type: Native
Media: HTTP
Average File Size: 4.0 MB
Total Collection File Size Begin Date: 2002-07-04T00:00:00.000Z