MOD21A1N.061 Terra Land Surface Temperature and 3-Band Emissivity Daily Global 1km

MODIS/061/MOD21A1N
Dataset Availability
2000-02-24T00:00:00Z–2024-05-16T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("MODIS/061/MOD21A1N")
Tags
daily emissivity global lst nasa surface-temperature terra usgs

Description

The MOD21A1N dataset is produced daily from nighttime Level 2 Gridded (L2G) intermediate LST products at a spatial resolution of 1,000 meters. The L2G process maps the daily MOD21 swath granules onto a sinusoidal MODIS grid and stores all observations falling over a gridded cell for a given day. The MOD21A1 algorithm sorts through these observations for each cell and estimates the final LST value as an average from all observations that are cloud free and have good LST&E accuracies. The nighttime average is weighted by the observation coverage for that cell. Only observations having an observation coverage greater than a 15% threshold are considered. The MOD21A1N product contains the calculated LST as well as quality control, the three emissivity bands, view zenith angle, and time of observation.

Documentation:

Bands

Resolution
1000 meters

Bands

Name Units Min Max Scale Offset Description
LST_1KM K 7500 65535 0.02

Land Surface Temperature

QC

Quality Control

Emis_29 0 255 0.002 0.49

Band 29 emissivity

Emis_31 1 255 0.002 0.49

Band 31 emissivity

Emis_32 1 255 0.002 0.49

Band 32 emissivity

View_Angle deg 0 130 -65

MODIS view zenith angle

View_Time h 0 240 0.1

Time of MODIS observation

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)

var dataset = ee.ImageCollection('MODIS/061/MOD21A1N')
                  .filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var landSurfaceTemperature = dataset.select('LST_1KM');
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,
    'Land Surface Temperature');
Open in Code Editor