- Dataset Availability
- 2012-01-19T00:00:00Z–2023-04-30T00:00:00
- Dataset Provider
- NASA LP DAAC at the USGS EROS Center
- Earth Engine Snippet
-
ee.ImageCollection("NOAA/VIIRS/001/VNP21A1N")Sign up for Earth Engine
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- Tags
Description
The NASA Suomi National Polar-Orbiting Partnership (Suomi NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Land Surface Temperature and Emissivity (LST&E) Night Version 1 product (VNP21A1N) is compiled daily from nighttime Level 2 Gridded (L2G) intermediate products.
The L2G process maps the daily VNP21 swath granules onto a sinusoidal MODIS grid and stores all observations overlapping a gridded cell for a given night. The VNP21A1 algorithm sorts through all these observations for each cell and estimates the final LST value as an average from all cloud-free observations that have good LST accuracies. Only observations having observation coverage more than a certain threshold (15%) are considered for this averaging.
Documentation:
Bands
Resolution
1000 meters
Bands
| Name | Units | Scale | Offset | Description | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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LST_1KM |
K | 0.02 | Daily 1 km Land Surface Temperature. |
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QC |
Daily Quality control for LST and emissivity |
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Emis_14 |
0.002 | 0.49 | Daily M14 emissivity |
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Emis_15 |
0.002 | 0.49 | Daily M15 emissivity |
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Emis_16 |
0.002 | 0.49 | Daily M16 emissivity |
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View_Angle |
deg | -65 | View zenith angle of LST |
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View_Time |
h | 0.1 | Time of LST observation |
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Terms of Use
Terms of Use
LP DAAC NASA data are freely accessible; however, when an author publishes these data or works based on the data, it is requested that the author cite the datasets within the text of the publication and include a reference to them in the reference list.
Citations
Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.
DOIs
Explore in Earth Engine
var dataset = ee.ImageCollection('NOAA/VIIRS/001/VNP21A1N')
.filter(ee.Filter.date('2022-11-01', '2022-12-01'));
var visualization = {
bands: ['LST_1KM'],
min: 200,
max: 300,
palette: [
'a50026',
'd73027',
'f46d43',
'fdae61',
'fee08b',
'ffffbf',
'd9ef8b',
'a6d96a',
'66bd63',
'1a9850',
'006837',
]
};
Map.setCenter(41.2, 38.84, 3);
Map.addLayer(dataset, visualization, 'LST');