- Dataset Availability
- 2012-04-01T00:00:00 - Present
- Dataset Provider
- NOAA
- Earth Engine Snippet
-
ee.ImageCollection("NOAA/VIIRS/DNB/MONTHLY_V1/VCMCFG")Sign up for Earth Engine
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- Tags
Description
Monthly average radiance composite images using nighttime data from the Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB).
As these data are composited monthly, there are many areas of the globe where it is impossible to get good quality data coverage for that month. This can be due to cloud cover, especially in the tropical regions, or due to solar illumination, as happens toward the poles in their respective summer months. Therefore it is recommended that users of these data utilize the 'cf_cvg' band and not assume a value of zero in the average radiance image means that no lights were observed.
Cloud cover is determined using the VIIRS Cloud Mask product (VCM). In addition, data near the edges of the swath are not included in the composites (aggregation zones 29-32). Version 1 has NOT been filtered to screen out lights from aurora, fires, boats, and other temporal lights. This separation is under development and will be included in a later version of this time series. Also in development is a method to separate lights from background (non-light) values.
Prior to averaging, the DNB data is filtered to exclude data impacted by stray light, lightning, lunar illumination, and cloud-cover.
Product generated by the Earth Observation Group, NOAA National Geophysical Data Center.
Bands
Resolution
15 arc seconds
Bands
| Name | Units | Min | Max | Description |
|---|---|---|---|---|
avg_rad |
nanoWatts/cm2/sr | -1.5* | 340573* | Average DNB radiance values. |
cf_cvg |
0* | 58* | Cloud-free coverages; the total number of observations that went into each pixel. This band can be used to identify areas with low numbers of observations where the quality is reduced. |
Terms of Use
Terms of Use
NOAA data, information, and products, regardless of the method of delivery, are not subject to copyright and carry no restrictions on their subsequent use by the public. Once obtained, they may be put to any lawful use. The forgoing data is in the public domain and is being provided without restriction on use and distribution.
Explore in Earth Engine
var dataset = ee.ImageCollection('NOAA/VIIRS/DNB/MONTHLY_V1/VCMCFG')
.filter(ee.Filter.date('2017-05-01', '2017-05-31'));
var nighttime = dataset.select('avg_rad');
var nighttimeVis = {min: 0.0, max: 60.0};
Map.setCenter(-77.1056, 38.8904, 8);
Map.addLayer(nighttime, nighttimeVis, 'Nighttime');