MOD11B1 v061

MODIS/Terra Land Surface Temperature/Emissivity Daily L3 Global 6 km SIN Grid


PI: Zhengming Wan

Description

The Terra Moderate Resolution Imaging Spectroradiometer (MODIS) Land Surface Temperature/Emissivity Daily(MOD11B1) Version 6.1 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 MOD11B products are additional day and night LST layers generated from band 31 of the corresponding 1 km MOD11_L2 swath product aggregated to the 6 km grid.

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Characteristics

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).

Product Maturity

Validation at stage 2 has been achieved for all MODIS Land Surface Temperature and Emissivity products. Further details regarding MODIS land product validation for the MOD11 data products are available from the MODIS Land Team Validation site.

Collection and Granule

Collection

Characteristic Description
CollectionTerra MODIS
DOI10.5067/MODIS/MOD11B1.061
File Size~0.2 MB
Temporal ResolutionDaily
Temporal Extent2000-02-24 to Present
Spatial ExtentGlobal
Coordinate SystemSinusoidal
DatumN/A
File FormatHDF-EOS
Geographic Dimensions1200 km x 1200 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers23
Columns/Rows200 x 200
Pixel Size5600 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor Additional Offset
LST_Day_6km Daytime Land Surface Temperature Kelvin 16-bit unsigned integer 0 N/A 7500 to 65535 0.02 N/A
QC_Day Daytime LST Quality Indicators Bit Field 8-bit unsigned integer N/A N/A 0 to 255 N/A N/A
Day_view_time Local time of day observation Hours 8-bit unsigned integer 255 N/A 0 to 120 0.2 N/A
Day_view_angl View zenith angle of day observation Degree 8-bit unsigned integer 255 N/A 0 to 130 N/A -65
LST_Night_6km Nighttime Land Surface Temperature Kelvin 16-bit unsigned integer 0 N/A 7500 to 65535 0.02 N/A
QC_Night Nighttime LST Quality indicators Bit Field 8-bit unsigned integer N/A N/A 0 to 255 N/A N/A
Night_view_time Local time of night observation Hours 8-bit unsigned integer 255 N/A 0 to 120 0.2 N/A
Night_view_angl View zenith angle of night observation Degree 8-bit unsigned integer 255 N/A 0 to 130 N/A -65
Emis_20 Band 20 emissivity N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
Emis_22 Band 22emissivity N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
Emis_23 Band 23 emissivity N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
Emis_29 Band 29 emissivity N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
Emis_31 Band 31 emissivity N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
Emis_32 Band 32 emissivity N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
LST_Day_6km_Aggregated_from_1km Daytime LST aggregated from 1km Kelvin 16-bit unsigned integer 0 N/A 7500 to 65535 0.02 N/A
LST_Night_6km_Aggregated_from_1km Nighttime LST aggregated from 1km Kelvin 16-bit unsigned integer 0 N/A 7500 to 65535 0.02 N/A
Emis_20_night Band 20 emissivity night N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
Emis_22_night Band 22 emissivity night N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
Emis_23_night Band 23 emissivity night N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
Emis_29_night Band 29 emissivity night N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002 0.49
QC_Emis Daytime emissivity quality indicators Bit Field 8-bit unsigned integer N/A N/A 0 to 255 N/A N/A
QC_Emis_night Nighttime emissivity quality indicators Bit Field 8-bit unsigned integer N/A N/A 0 to 255 N/A N/A
Percent_land_in_grid Percentage of land in the grid Percent 8-bit unsigned integer 0 N/A 1 to 100 N/A N/A

Product Quality

The Quality Control (QC) layers are stored in an efficient bit-encoded manner. The unpack_sds_bits executable from the LDOPE Tools is available to the user community to help parse and interpret the QC layers.

The QA bit flags for the QC layers are provided in Table 20 of the User Guide.

Known Issues

For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.

Documentation

User Guide
Algorithm Theoretical Basis Document (ATBD)
File Specification

Using the Data

Access Data

Citation

DOI: 10.5067/MODIS/MOD11B1.061

About the Image

Terra MODIS land surface temperature data from the MOD11B1 product over Tibet, May 27, 2020.

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