VNP46A1: VIIRS Daily Gridded Day Night Band 500m Linear Lat Lon Grid Night

NOAA/VIIRS/001/VNP46A1
Dataset Availability
2012-01-19T00:00:00Z–2024-05-17T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("NOAA/VIIRS/001/VNP46A1")
Tags
daily dnb nasa noaa viirs

Description

The Suomi National Polar-orbiting Partnership (SNPP) Visible Infrared Imaging Radiometer Suite (VIIRS) supports a Day-Night Band (DNB) sensor that provides global daily measurements of nocturnal visible and near-infrared (NIR) light that are suitable for Earth system science and applications. The VIIRS DNB's ultra-sensitivity in lowlight conditions enables us to generate a new set of science-quality nighttime products that manifest substantial improvements in sensor resolution and calibration when compared to the previous era of Defense Meteorological Satellite Program/Operational Linescan System's (DMSP/OLS) nighttime lights image products.

VNP46A1 is a daily, top-of-atmosphere, at-sensor nighttime radiance product called VIIRS/NPP Daily Gridded Day Night Band 15 arc-second Linear Lat Lon Grid Night. The product contains 26 Science Data Sets (SDS) that include sensor radiance, zenith and azimuth angles (at-sensor, solar, and lunar), cloud-mask flags, time, shortwave IR radiance, brightness temperatures, VIIRS quality flags, moon phase angle, and moon illumination fraction. It also provides Quality Flag (QF) information specific to the cloud-mask, VIIRS moderate-resolution bands M10, M11, M12, M13, M15, M16, and DNB.

Documentation:

Bands

Resolution
500 meters

Bands

Name Units Min Max Description
BrightnessTemperature_M12 K 0 163.835

Brightness temperature of band M12

BrightnessTemperature_M13 K 0 163.835

Brightness temperature of band M13

BrightnessTemperature_M15 K 0 163.835

Brightness temperature of band M15

BrightnessTemperature_M16 K 0 163.835

Brightness temperature of band M16

DNB_At_Sensor_Radiance_500m 0 6553.4

At-sensor DNB radiance

Glint_Angle deg -180 180

Moon glint angle

Granule 0 254

Number of selected Granule

Lunar_Zenith deg 0 180

Lunar zenith angle

Lunar_Azimuth deg -180 180

Lunar azimuth angle

Moon_Illumination_Fraction % 0 100

Moon illumination fraction

Moon_Phase_Angle deg 0 180

Moon phase angle

QF_Cloud_Mask

Quality flag for cloud mask

QF_DNB 0 65534

DNB quality flag

QF_VIIRS_M10 0 65534

Quality flag of band M10

QF_VIIRS_M11 0 65534

Quality flag of band M11

QF_VIIRS_M12 0 65534

Quality flag of band M12

QF_VIIRS_M13 0 65534

Quality flag of band M13

QF_VIIRS_M15 0 65534

Quality flag of band M15

QF_VIIRS_M16 0 65534

Quality flag of band M16

Radiance_M10 0 85.1942

Radiance in band M10

Radiance_M11 0 38.0097

Radiance in band M11

Sensor_Azimuth deg -180 180

Sensor azimuth angle

Sensor_Zenith deg -90 90

Sensor zenith angle

Solar_Azimuth deg -180 180

Solar azimuth angle

Solar_Zenith deg 0 180

Solar zenith angle

UTC_Time h 0 24

UTC time

QF_DNB Class Table

Value Color Description
1 Substitute_Cal
2 Out_of_Range
4 Saturation
8 Temp_not_Nominal
16 Stray_light
256 Bowtie_Deleted
512 Missing_EV
1024 Cal_Fail
2048 Dead_Detector

QF_VIIRS_M10 Class Table

Value Color Description
1 Substitute_Cal
2 Out_of_Range
4 Saturation
8 Temp_not_Nominal
256 Bowtie_Deleted
512 Missing_EV
1024 Cal_Fail
2048 Dead_Detector

QF_VIIRS_M11 Class Table

Value Color Description
1 Substitute_Cal
2 Out_of_Range
4 Saturation
8 Temp_not_Nominal
256 Bowtie_Deleted
512 Missing_EV
1024 Cal_Fail
2048 Dead_Detector

QF_VIIRS_M12 Class Table

Value Color Description
1 Substitute_Cal
2 Out_of_Range
4 Saturation
8 Temp_not_Nominal
256 Bowtie_Deleted
512 Missing_EV
1024 Cal_Fail
2048 Dead_Detector

QF_VIIRS_M13 Class Table

Value Color Description
1 Substitute_Cal
2 Out_of_Range
4 Saturation
8 Temp_not_Nominal
256 Bowtie_Deleted
512 Missing_EV
1024 Cal_Fail
2048 Dead_Detector

QF_VIIRS_M15 Class Table

Value Color Description
1 Substitute_Cal
2 Out_of_Range
4 Saturation
8 Temp_not_Nominal
256 Bowtie_Deleted
512 Missing_EV
1024 Cal_Fail
2048 Dead_Detector

QF_VIIRS_M16 Class Table

Value Color Description
1 Substitute_Cal
2 Out_of_Range
4 Saturation
8 Temp_not_Nominal
256 Bowtie_Deleted
512 Missing_EV
1024 Cal_Fail
2048 Dead_Detector

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

Citations:

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('NOAA/VIIRS/001/VNP46A1').filter(
  ee.Filter.date('2013-01-01', '2013-07-01'));

// At-sensor Day/night Band radiance (DNB).
var dnb = dataset.select('DNB_At_Sensor_Radiance_500m');
var dnbVis = {
  min: 0,
  max: 50,
  palette: ['black', 'purple', 'cyan', 'green', 'yellow', 'red', 'white'],
};

Map.setCenter(-79.4, 43.1, 8);

Map.addLayer(dnb, dnbVis, 'Day-Night Band (DNB) at sensor radiance 500m');
Open in Code Editor