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Description

The MYD11B1 Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MYD11B1 Version 6.1 data product.

The MYD11B1 Version 6 product provides daily per pixel Land Surface Temperature and Emissivity (LST&E) in a 1,200 by 1,200 kilometer (km) tile with a pixel size of 5,600 meters (m). Each MOD11B1 granule consists of the following layers for daytime and nighttime observations: LSTs, quality control assessments, observation times, view zenith angles, number of clear-sky observations, and emissivities from bands 20, 22, 23, 29, 31, and 32 (bands 31 and 32 are daytime only) along with the percentage of land in the tile. Unique to the MYD11B products are additional day and night LST layers generated from band 31 of the corresponding 1 km MYD11_L2 swath product aggregated to the 6 km grid.

Known Issues

Improvements/Changes from Previous Versions

  • Removed cloud-contaminated LSTs from Level 2 and Level 3 LST products.
  • Updated the coefficient look-up table (LUT) for the split-window algorithm with comprehensive regression analysis of Moderate Resolution Imaging Spectroradiometer (MODIS) simulation data in bands 31 and 32 over wide ranges of surface and atmospheric conditions, especially extending the upper boundary for (LST – Ts-air) in arid and semi-arid regions. Increased the overlap between various sub-ranges to reduce the sensitivity of the algorithm to uncertainties in the input data (i.e., column water vapor and air surface temperature from MYD07).
  • Made minor adjustments in the classification-based surface emissivity values, especially for bare soil and rocks land cover types.
  • Tuned the day/night algorithm by adjusting weights to improve performance in desert regions where the incorporated split-window algorithm may not work well.
  • Generated new gridded LST&E products with a 6 km spatial resolution for 8-day (MYD11B2) and monthly (MYD11B3) intervals in response to user community requests.

Version Description

The MYD11B1 Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MYD11B1 Version 6.1 data product (https://doi.org/10.5067/MODIS/MYD11B1.061).

Product Summary

Platforms
Aqua
Instruments
MODIS
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Spatial Resolution
5600 Meters x 5600 Meters
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2002-07-04 to 2023-02-26
Temporal Resolution
1 Day
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC)
MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/MODAPS)
Concept ID
C2763370207-LPCLOUD
Data State
DEPRECATED
Processing Level
3
Published
Updated
Science Keywords
Land Surface Temperature,
Emissivity

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Wan, Z., Hook, S., & Hulley, G. (2015). MYD11B1 MODIS/Aqua Land Surface Temperature/Emissivity Daily L3 Global 6km SIN Grid V006 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MYD11B1.006 Date Accessed: 2025-10-30

File Naming Convention

MYD11B1.A2002281.h08v07.006.2015161040113.hdf

The file name begins with the Product Short Name (MYD11B1) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2002281), the Tile Identifier which is horizontal tile and vertical tile provided as hXXvYY (h08v07), the Version of the data collection (006), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2015161040113), and the Data Format (hdf).

Documents

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Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
Day_view_angl View zenith angle of day observation Degree uint8 255 255 to 130 N/A
Day_view_time Local time of day observation Hours uint8 255 255 to 120 0.2
Emis_20 Band 20 emissivity N/A uint8 0 0 to 255 0.002
Emis_20_night Band 20 emissivity night N/A uint8 0 0 to 255 0.002
Emis_22 Band 22 emissivity N/A uint8 0 0 to 255 0.002
Emis_22_night Band 22 emissivity night N/A uint8 0 0 to 255 0.002
Emis_23 Band 23 emissivity N/A uint8 0 0 to 255 0.002
Emis_23_night Band 23 emissivity night N/A uint8 0 0 to 255 0.002
Emis_29 Band 29 emissivity N/A uint8 0 0 to 255 0.002
Emis_29_night Band 29 emissivity night N/A uint8 0 0 to 255 0.002
Emis_31 Band 31 emissivity N/A uint8 0 0 to 255 0.002
Emis_32 Band 32 emissivity N/A uint8 0 0 to 255 0.002
LST_Day_6km Day Land Surface Temperature Kelvin uint16 0 0 to 65535 0.02
LST_Day_6km_Aggregated_from_1km Daytime LST aggregated from 1km Kelvin uint16 0 0 to 65535 0.02
LST_Night_6km Night Land Surface Temperature Kelvin uint16 0 0 to 65535 0.02
LST_Night_6km_Aggregated_from_1km Nighttime LST aggregated from 1km Kelvin uint16 0 0 to 65535 0.02
Night_view_angl View zenith angle of night observation Degree uint8 255 255 to 130 N/A
Night_view_time Local time of night observation Hours uint8 255 255 to 120 0.2
Percent_land_in_grid Percentage of land in the grid Percent uint8 0 0 to 100 N/A
QC_Day Daytime LST Quality Indicators Bit Field uint8 N/A N/A to 255 N/A
QC_Emis Daytime emissivity quality indicators Bit Field uint8 N/A N/A to 255 N/A
QC_Emis_night Nighttime emissivity quality indicators Bit Field uint8 N/A N/A to 255 N/A
QC_Night Nighttime LST Quality indicators Bit Field uint8 N/A N/A to 255 N/A
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