MYD21C2.061 Aqua Land Surface Temperature and 3-Band Emissivity 8-Day L3 Global 0.05 Deg CMG

AI-generated Key Takeaways

The MYD21C2 dataset provides 8-day composite Land Surface Temperature (LST) data using a simple averaging method of cloud-free daily acquisitions.
This dataset includes separate bands for daytime and nighttime LST, Quality Control, view zenith angle, and viewing time, along with averaged values for MODIS emissivity bands.
The dataset is available from February 24, 2000, to October 8, 2025, with an 8-day cadence.
Data acquired through the LP DAAC for this dataset have no restrictions on subsequent use, sale, or redistribution.

Dataset Availability: 2000-02-24T00:00:00Z–2025-11-01T00:00:00Z
Dataset Provider: NASA LP DAAC at the USGS EROS Center

Cadence: 8 Days
Tags: aqua climate emissivity global lst nasa surface-temperature usgs

Description

The MYD21C2 dataset is an 8-day composite LST product that uses an algorithm based on a simple averaging method. The algorithm calculates the average from all the cloud free MYD21A1D and MYD21A1N daily acquisitions from the 8-day period. Unlike the MYD21A1 data sets where the daytime and nighttime acquisitions are separate products, the MYD21A2 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

65535

meters

Count of Daytime Input Values

Count_Night

65535

meters

Count of Nighttime Input Values

QC_Day

meters

Quality Control for Daytime LST and Emissivity

Bitmask for QC_Day

Bits 0-1: Mandatory QA flags
- 0: Pixel produced, good quality, no further QA info necessary
- 1: Pixel produced, nominal quality. Recommend more detailed analysis of other QC information
- 2: Pixel not produced due to cloud
- 3: Pixel not produced due to reasons other than cloud
Bits 2-3: Data quality flag
- 0: Good data quality of L1B bands 29, 31, 32
- 1: Missing pixel
- 2: Fairly calibrated
- 3: Poorly calibrated, TES processing skipped
Bits 4-5: Emissivity accuracy
- 0:
  0.02 (Poor performance)
- 1: 0.015 - 0.02 (Marginal performance)
- 2: 0.01 - 0.015 (Good performance)
- 3: <0.01 (Excellent performance)
Bits 6-7: LST accuracy
- 0:
  2K (Poor performance)
- 1: 1.5 - 2K (Marginal performance)
- 2: 1 - 1.5K (Good performance)
- 3: <1K (Excellent performance)

QC_Night

meters

Quality Control for Nighttime LST and Emissivity

Bitmask for QC_Night

Bits 0-1: Mandatory QA flags
- 0: Pixel produced, good quality, no further QA info necessary
- 1: Pixel produced, nominal quality. Recommend more detailed analysis of other QC information
- 2: Pixel not produced due to cloud
- 3: Pixel not produced due to reasons other than cloud
Bits 2-3: Data quality flag
- 0: Good data quality of L1B bands 29, 31, 32
- 1: Missing pixel
- 2: Fairly calibrated
- 3: Poorly calibrated, TES processing skipped
Bits 4-5: Emissivity accuracy
- 0:
  0.02 (Poor performance)
- 1: 0.015 - 0.02 (Marginal performance)
- 2: 0.01 - 0.015 (Good performance)
- 3: <0.01 (Excellent performance)
Bits 6-7: LST accuracy
- 0:
  2K (Poor performance)
- 1: 1.5 - 2K (Marginal performance)
- 2: 1 - 1.5K (Good performance)
- 3: <1K (Excellent performance)

LST_Day

7500

65535

0.02

meters

Average Daytime Land Surface Temperature

LST_Night

7500

65535

0.02

meters

Average Nighttime Land Surface Temperature

LST_Day_err

255

0.04

meters

Root-mean-square-error Daytime Land Surface Temperature

LST_Night_err

255

0.04

meters

Average Nighttime Land Surface Temperature

Day_view_angle

deg

130

-65

meters

Average Daytime View Zenith Angle

Night_view_angle

deg

130

-65

meters

Average Nighttime View Zenith Angle

Day_view_time

120

0.2

meters

Average Daytime View Time (UTC)

Night_view_time

120

0.2

meters

Average Nighttime View Time (UTC)

Emis_29_Day

255

0.002

0.49

meters

Average Daytime Band 29 Emissivity

Emis_29_Night

255

0.002

0.49

meters

Average Nighttime Band 29 Emissivity

Emis_29_Day_err

65535

0.0001

meters

Root-mean-square-error Daytime Band 29 Emissivity

Emis_29_Night_err

65535

0.0001

meters

Root-mean-square-error Nighttime Band 29 Emissivity

Emis_31_Day

255

0.002

0.49

meters

Average Daytime Band 31 Emissivity

Emis_31_Night

255

0.002

0.49

meters

Average Nighttime Band 31 Emissivity

Emis_31_Day_err

65535

0.0001

meters

Root-mean-square-error Daytime Band 31 Emissivity

Emis_31_Night_err

65535

0.0001

meters

Root-mean-square-error Nighttime Band 31 Emissivity

Emis_32_Day

255

0.002

0.49

meters

Average Daytime Band 32 Emissivity

Emis_32_Night

255

0.002

0.49

meters

Average Nighttime Band 32 Emissivity

Emis_32_Day_err

65535

0.0001

meters

Root-mean-square-error Daytime Band 32 Emissivity

Emis_32_Night_err

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

100

meters

Percent of Land Detections in Grid Cell

Clear_sky_days

2.14748e+09

meters

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

Clear_sky_nights

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

Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.

DOIs

https://doi.org/10.5067/MODIS/MYD21C2.061

Explore with Earth Engine

Code Editor (JavaScript)

 var 
  
 dataset 
  
 = 
  
 ee 
 . 
 ImageCollection 
 ( 
 'MODIS/061/MYD21C2' 
 ) 
  
 . 
 filter 
 ( 
 ee 
 . 
 Filter 
 . 
 date 
 ( 
 '2018-01-01' 
 , 
  
 '2018-05-01' 
 )); 
 var 
  
 landSurfaceTemperature 
  
 = 
  
 dataset 
 . 
 select 
 ( 
 'LST_Day' 
 ); 
 var 
  
 landSurfaceTemperatureVis 
  
 = 
  
 { 
  
 min 
 : 
  
 216.0 
 , 
  
 max 
 : 
  
 348.0 
 , 
  
 palette 
 : 
  
 [ 
  
 '040274' 
 , 
  
 '040281' 
 , 
  
 '0502a3' 
 , 
  
 '0502b8' 
 , 
  
 '0502ce' 
 , 
  
 '0502e6' 
 , 
  
 '0602ff' 
 , 
  
 '235cb1' 
 , 
  
 '307ef3' 
 , 
  
 '269db1' 
 , 
  
 '30c8e2' 
 , 
  
 '32d3ef' 
 , 
  
 '3be285' 
 , 
  
 '3ff38f' 
 , 
  
 '86e26f' 
 , 
  
 '3ae237' 
 , 
  
 'b5e22e' 
 , 
  
 'd6e21f' 
 , 
  
 'fff705' 
 , 
  
 'ffd611' 
 , 
  
 'ffb613' 
 , 
  
 'ff8b13' 
 , 
  
 'ff6e08' 
 , 
  
 'ff500d' 
 , 
  
 'ff0000' 
 , 
  
 'de0101' 
 , 
  
 'c21301' 
 , 
  
 'a71001' 
 , 
  
 '911003' 
  
 ], 
 }; 
 Map 
 . 
 setCenter 
 ( 
 6.746 
 , 
  
 46.529 
 , 
  
 2 
 ); 
 Map 
 . 
 addLayer 
 ( 
  
 landSurfaceTemperature 
 , 
  
 landSurfaceTemperatureVis 
 , 
  
 'Average Daytime Land Surface Temperature' 
 );

Open in Code Editor

MYD21C2.061 Aqua Land Surface Temperature and 3-Band Emissivity 8-Day L3 Global 0.05 Deg CMG

MODIS/061/MYD21C2, aqua,climate,emissivity,global,lst,nasa,surface-temperature,usgs

2000-02-24T00:00:00Z/2025-11-01T00:00:00Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets

MYD21C2.061 Aqua Land Surface Temperature and 3-Band Emissivity 8-Day L3 Global 0.05 Deg CMG Stay organized with collections Save and categorize content based on your preferences.

AI-generated Key Takeaways

Description

Bands

Terms of Use

Citations

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

MYD21C2.061 Aqua Land Surface Temperature and 3-Band Emissivity 8-Day L3 Global 0.05 Deg CMG