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

Dataset Availability: 2000-02-24T00:00:00Z–2024-11-01T00:00:00Z
Dataset Provider: NASA LP DAAC at the USGS EROS Center
Earth Engine Snippet: ee.ImageCollection("MODIS/061/MOD21C3")

Cadence: 1 Month
Tags: 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

Resolution
1000 meters

Bands

Name	Units	Min	Max	Scale	Offset	Description
`Count_Day`		1	65535			Count of Daytime Input Values
`Count_Night`		1	65535			Count of Nighttime Input Values
`QC_Day`						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`						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`	K	7500	65535	0.02		Average Daytime Land Surface Temperature
`LST_Night`	K	7500	65535	0.02		Average Nighttime Land Surface Temperature
`LST_Day_err`	K	1	255	0.04		Root-mean-square-error Daytime Land Surface Temperature
`LST_Night_err`	K	1	255	0.04		Average Nighttime Land Surface Temperature
`Day_view_angle`	deg	0	130		-65	Average Daytime View Zenith Angle
`Night_view_angle`	deg	0	130		-65	Average Nighttime View Zenith Angle
`Day_view_time`	h	0	120	0.2		Average Daytime View Time (UTC)
`Night_view_time`	h	0	120	0.2		Average Nighttime View Time (UTC)
`Emis_29_Day`		1	255	0.002	0.49	Average Daytime Band 29 Emissivity
`Emis_29_Night`		1	255	0.002	0.49	Average Nighttime Band 29 Emissivity
`Emis_29_Day_err`		1	65535	0.0001		Root-mean-square-error Daytime Band 29 Emissivity
`Emis_29_Night_err`		1	65535	0.0001		Root-mean-square-error Nighttime Band 29 Emissivity
`Emis_31_Day`		1	255	0.002	0.49	Average Daytime Band 31 Emissivity
`Emis_31_Night`		1	255	0.002	0.49	Average Nighttime Band 31 Emissivity
`Emis_31_Day_err`		1	65535	0.0001		Root-mean-square-error Daytime Band 31 Emissivity
`Emis_31_Night_err`		1	65535	0.0001		Root-mean-square-error Nighttime Band 31 Emissivity
`Emis_32_Day`		1	255	0.002	0.49	Average Daytime Band 32 Emissivity
`Emis_32_Night`		1	255	0.002	0.49	Average Nighttime Band 32 Emissivity
`Emis_32_Day_err`		1	65535	0.0001		Root-mean-square-error Daytime Band 32 Emissivity
`Emis_32_Night_err`		1	65535	0.0001		Root-mean-square-error Nighttime Band 32 Emissivity
`View_Angle`	deg				-65	MODIS view zenith angle
`Percent_land_in_grid`	%	1	100			Percent of Land Detections in Grid Cell
`Clear_sky_days`		0	2.14748e+09			Bitmap of Clear Sky Days (1 = clear, LSB = 1st day)
`Clear_sky_nights`		0	2.14748e+09			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/MOD21C3.061

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MOD21C3')
                  .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

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

MODIS/061/MOD21C3, emissivity,global,lst,monthly,nasa,surface-temperature,terra,usgs

2000-02-24T00:00:00Z/2024-11-01T00:00:00Z

Google Earth Engine

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

https://doi.org/10.5067/MODIS/MOD21C3.061