MOD21C3.061 Terra Land Surface Temperature and 3-Band Emissivity Monthly L3 Global 0.05 Deg CMG

    MODIS/061/MOD21C3
    Dataset Availability
    2000-02-24T00:00:00Z–2025-07-01T00:00:00Z
    Dataset Provider
    Earth Engine Snippet
    ee.ImageCollection("MODIS/061/MOD21C3")
    Cadence
    1 Month
    Tags
    climate emissivity global lst monthly nasa surface-temperature terra usgs

    Description

    The MOD21C3 dataset is a monthly composite LST product that uses an algorithm based on a simple averaging method. The algorithm calculates the average from all the cloud free MOD21A1D and MOD21A1N 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. The LST, Quality Control (QC), view zenith angle, and viewing time have separate day and night bands, while the values for the MODIS emissivity bands 29, 31, and 32 are the average of both the nighttime and daytime acquisitions.

    Documentation:

    Bands

    Pixel Size 1000 meters

    Bands

    Name
    Units
    Min
    Max
    Scale
    Offset
    Pixel Size
    Description
    Count_Day
    1
    65535
    meters

    Count of Daytime Input Values

    Count_Night
    1
    65535
    meters

    Count of Nighttime Input Values

    QC_Day
    meters

    Quality Control for Daytime LST and Emissivity

    QC_Night
    meters

    Quality Control for Nighttime LST and Emissivity

    LST_Day
    K
    7500
    65535
    0.02
    meters

    Average Daytime Land Surface Temperature

    LST_Night
    K
    7500
    65535
    0.02
    meters

    Average Nighttime Land Surface Temperature

    LST_Day_err
    K
    1
    255
    0.04
    meters

    Root-mean-square-error Daytime Land Surface Temperature

    LST_Night_err
    K
    1
    255
    0.04
    meters

    Average Nighttime Land Surface Temperature

    Day_view_angle
    deg
    0
    130
    -65
    meters

    Average Daytime View Zenith Angle

    Night_view_angle
    deg
    0
    130
    -65
    meters

    Average Nighttime View Zenith Angle

    Day_view_time
    h
    0
    120
    0.2
    meters

    Average Daytime View Time (UTC)

    Night_view_time
    h
    0
    120
    0.2
    meters

    Average Nighttime View Time (UTC)

    Emis_29_Day
    1
    255
    0.002
    0.49
    meters

    Average Daytime Band 29 Emissivity

    Emis_29_Night
    1
    255
    0.002
    0.49
    meters

    Average Nighttime Band 29 Emissivity

    Emis_29_Day_err
    1
    65535
    0.0001
    meters

    Root-mean-square-error Daytime Band 29 Emissivity

    Emis_29_Night_err
    1
    65535
    0.0001
    meters

    Root-mean-square-error Nighttime Band 29 Emissivity

    Emis_31_Day
    1
    255
    0.002
    0.49
    meters

    Average Daytime Band 31 Emissivity

    Emis_31_Night
    1
    255
    0.002
    0.49
    meters

    Average Nighttime Band 31 Emissivity

    Emis_31_Day_err
    1
    65535
    0.0001
    meters

    Root-mean-square-error Daytime Band 31 Emissivity

    Emis_31_Night_err
    1
    65535
    0.0001
    meters

    Root-mean-square-error Nighttime Band 31 Emissivity

    Emis_32_Day
    1
    255
    0.002
    0.49
    meters

    Average Daytime Band 32 Emissivity

    Emis_32_Night
    1
    255
    0.002
    0.49
    meters

    Average Nighttime Band 32 Emissivity

    Emis_32_Day_err
    1
    65535
    0.0001
    meters

    Root-mean-square-error Daytime Band 32 Emissivity

    Emis_32_Night_err
    1
    65535
    0.0001
    meters

    Root-mean-square-error Nighttime Band 32 Emissivity

    View_Angle
    deg
    -65
    meters

    MODIS view zenith angle

    Percent_land_in_grid
    %
    1
    100
    meters

    Percent of Land Detections in Grid Cell

    Clear_sky_days
    0
    2.14748e+09
    meters

    Bitmap of Clear Sky Days (1 = clear, LSB = 1st day)

    Clear_sky_nights
    0
    2.14748e+09
    meters

    Bitmap of Clear Sky Nights (1 = clear, LSB = 1st day)

    Terms of Use

    Terms of Use

    MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.

    Citations

    Citations:

    DOIs

    Explore with Earth Engine

    Code Editor (JavaScript) 

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    Open in Code Editor
    The MOD21C3 dataset is a monthly composite LST product that uses an algorithm based on a simple averaging method. The algorithm calculates the average from all the cloud free MOD21A1D and MOD21A1N daily acquisitions from the 8-day period. Unlike the MOD21A1 data sets where the daytime and nighttime acquisitions are …
    MODIS/061/MOD21C3, climate,emissivity,global,lst,monthly,nasa,surface-temperature,terra,usgs
    2000-02-24T00:00:00Z/2025-07-01T00:00:00Z
    -90 -180 90 180
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