![NOAA/VIIRS/001/VNP46A1](https://developers.google.com/earth-engine/datasets/images/NOAA/NOAA_VIIRS_001_VNP46A1_sample.png)

Dataset Availability
:   2012-01-19T00:00:00Z--2025-01-02T00:00:00Z

Dataset Producer
:


    [NASA LAADS DAAC](https://doi.org/10.5067/VIIRS/VNP46A1.001)

Cadence
:   1 Day

Tags
:
    [daily](https://developers.google.com/earth-engine/datasets/tags/daily) [dnb](https://developers.google.com/earth-engine/datasets/tags/dnb) [nasa](https://developers.google.com/earth-engine/datasets/tags/nasa) [noaa](https://developers.google.com/earth-engine/datasets/tags/noaa) [population](https://developers.google.com/earth-engine/datasets/tags/population) [viirs](https://developers.google.com/earth-engine/datasets/tags/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:

- [User's Guide](https://ladsweb.modaps.eosdis.nasa.gov/api/v2/content/archives/Document%20Archive/Science%20Data%20Product%20Documentation/VIIRS_Black_Marble_UG_v1.3_Sep_2022.pdf)

- [Algorithm Theoretical Basis Document (ATBD)](https://ladsweb.modaps.eosdis.nasa.gov/api/v2/content/archives/Document%20Archive/Science%20Data%20Product%20Documentation/Product%20Generation%20Algorithms/VIIRS_Black_Marble_ATBD_v1.1_July_2020.pdf)

- [General Documentation](https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/VNP46A1/)

### Bands

**Bands**

Pixel size: 500 meters (all bands)

| Name | Units | Min | Max | Offset | Pixel Size | Description |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| `BrightnessTemperature_M12` | K | 0 | 163.835 | 203 | 500 meters | Brightness temperature of band M12 |
| `BrightnessTemperature_M13` | K | 0 | 163.835 | 203 | 500 meters | Brightness temperature of band M13 |
| `BrightnessTemperature_M15` | K | 0 | 163.835 | 111 | 500 meters | Brightness temperature of band M15 |
| `BrightnessTemperature_M16` | K | 0 | 163.835 | 103 | 500 meters | Brightness temperature of band M16 |
| `DNB_At_Sensor_Radiance_500m` |   | 0 | 6553.4 |   | 500 meters | At-sensor DNB radiance |
| `Glint_Angle` | deg | -180 | 180 |   | 500 meters | Moon glint angle |
| `Granule` |   | 0 | 254 |   | 500 meters | Number of selected Granule |
| `Lunar_Zenith` | deg | 0 | 180 |   | 500 meters | Lunar zenith angle |
| `Lunar_Azimuth` | deg | -180 | 180 |   | 500 meters | Lunar azimuth angle |
| `Moon_Illumination_Fraction` | % | 0 | 100 |   | 500 meters | Moon illumination fraction |
| `Moon_Phase_Angle` | deg | 0 | 180 |   | 500 meters | Moon phase angle |
| `QF_Cloud_Mask` |   |   |   |   | 500 meters | Quality flag for cloud mask |
| Bitmask for QF_Cloud_Mask - Bit 0: Day/Night - 0: Night - 1: Day - Bits 1-3: Land/Water Background - 0: Land \& Desert - 1: Land no Desert - 2: Inland Water - 3: Sea Water - 5: Coastal - Bits 4-5: Cloud Mask Quality - 0: Poor - 1: Low - 2: Medium - 3: High - Bits 6-7: Cloud Detection Results \& Confidence Indicator - 0: Confident Clear - 1: Probably Clear - 2: Probably Cloudy - 3: Confident Cloudy - Bit 8: Shadow Detected - 0: No - 1: Yes - Bit 9: Cirrus Detection (IR) (BTM15 - BTM16) - 0: No cloud - 1: Cloud - Bit 10: Snow/Ice Surface - 0: No Snow/Ice - 1: Snow/Ice ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| `QF_DNB` |   | 0 | 65534 |   | 500 meters | DNB quality flag |
| `QF_VIIRS_M10` |   | 0 | 65534 |   | 500 meters | Quality flag of band M10 |
| `QF_VIIRS_M11` |   | 0 | 65534 |   | 500 meters | Quality flag of band M11 |
| `QF_VIIRS_M12` |   | 0 | 65534 |   | 500 meters | Quality flag of band M12 |
| `QF_VIIRS_M13` |   | 0 | 65534 |   | 500 meters | Quality flag of band M13 |
| `QF_VIIRS_M15` |   | 0 | 65534 |   | 500 meters | Quality flag of band M15 |
| `QF_VIIRS_M16` |   | 0 | 65534 |   | 500 meters | Quality flag of band M16 |
| `Radiance_M10` |   | 0 | 85.1942 | -0.04 | 500 meters | Radiance in band M10 |
| `Radiance_M11` |   | 0 | 38.0097 | -0.02 | 500 meters | Radiance in band M11 |
| `Sensor_Azimuth` | deg | -180 | 180 |   | 500 meters | Sensor azimuth angle |
| `Sensor_Zenith` | deg | 0 | 90 |   | 500 meters | Sensor zenith angle |
| `Solar_Azimuth` | deg | -180 | 180 |   | 500 meters | Solar azimuth angle |
| `Solar_Zenith` | deg | 0 | 180 |   | 500 meters | Solar zenith angle |
| `UTC_Time` | h | 0 | 24 |   | 500 meters | UTC time |

**QF_DNB Class Table**

| Value | Color | Description |
|---|---|---|
| 1 | None | Substitute_Cal |
| 2 | None | Out_of_Range |
| 4 | None | Saturation |
| 8 | None | Temp_not_Nominal |
| 16 | None | Stray_light |
| 256 | None | Bowtie_Deleted |
| 512 | None | Missing_EV |
| 1024 | None | Cal_Fail |
| 2048 | None | Dead_Detector |

**QF_VIIRS_M10 Class Table**

| Value | Color | Description |
|---|---|---|
| 1 | None | Substitute_Cal |
| 2 | None | Out_of_Range |
| 4 | None | Saturation |
| 8 | None | Temp_not_Nominal |
| 256 | None | Bowtie_Deleted |
| 512 | None | Missing_EV |
| 1024 | None | Cal_Fail |
| 2048 | None | Dead_Detector |

**QF_VIIRS_M11 Class Table**

| Value | Color | Description |
|---|---|---|
| 1 | None | Substitute_Cal |
| 2 | None | Out_of_Range |
| 4 | None | Saturation |
| 8 | None | Temp_not_Nominal |
| 256 | None | Bowtie_Deleted |
| 512 | None | Missing_EV |
| 1024 | None | Cal_Fail |
| 2048 | None | Dead_Detector |

**QF_VIIRS_M12 Class Table**

| Value | Color | Description |
|---|---|---|
| 1 | None | Substitute_Cal |
| 2 | None | Out_of_Range |
| 4 | None | Saturation |
| 8 | None | Temp_not_Nominal |
| 256 | None | Bowtie_Deleted |
| 512 | None | Missing_EV |
| 1024 | None | Cal_Fail |
| 2048 | None | Dead_Detector |

**QF_VIIRS_M13 Class Table**

| Value | Color | Description |
|---|---|---|
| 1 | None | Substitute_Cal |
| 2 | None | Out_of_Range |
| 4 | None | Saturation |
| 8 | None | Temp_not_Nominal |
| 256 | None | Bowtie_Deleted |
| 512 | None | Missing_EV |
| 1024 | None | Cal_Fail |
| 2048 | None | Dead_Detector |

**QF_VIIRS_M15 Class Table**

| Value | Color | Description |
|---|---|---|
| 1 | None | Substitute_Cal |
| 2 | None | Out_of_Range |
| 4 | None | Saturation |
| 8 | None | Temp_not_Nominal |
| 256 | None | Bowtie_Deleted |
| 512 | None | Missing_EV |
| 1024 | None | Cal_Fail |
| 2048 | None | Dead_Detector |

**QF_VIIRS_M16 Class Table**

| Value | Color | Description |
|---|---|---|
| 1 | None | Substitute_Cal |
| 2 | None | Out_of_Range |
| 4 | None | Saturation |
| 8 | None | Temp_not_Nominal |
| 256 | None | Bowtie_Deleted |
| 512 | None | Missing_EV |
| 1024 | None | Cal_Fail |
| 2048 | None | 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:

- Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data)

### DOIs

- <https://doi.org/10.5067/VIIRS/VNP46A1.001>

### Explore with Earth Engine

> [!NOTE]
> **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)

### Code Editor (JavaScript)

```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](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NOAA/NOAA_VIIRS_001_VNP46A1) [VNP46A1: VIIRS Daily Gridded Day Night Band 500m Linear Lat Lon Grid Night](https://developers.google.com/earth-engine/datasets/catalog/NOAA_VIIRS_001_VNP46A1) 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 ... NOAA/VIIRS/001/VNP46A1, daily,dnb,nasa,noaa,population,viirs 2012-01-19T00:00:00Z/2025-01-02T00:00:00Z -90 -180 90 180 Google Earth Engine https://developers.google.com/earth-engine/datasets

- [https://doi.org/10.5067/VIIRS/VNP46A1.001](https://doi.org/https://doi.org/10.5067/VIIRS/VNP46A1.001)
- [https://doi.org/10.5067/VIIRS/VNP46A1.001](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NOAA_VIIRS_001_VNP46A1)