VNP14A1 v001

VIIRS/NPP Thermal Anomalies/Fire Daily L3 Global 1 km SIN Grid


PI: Wilfrid Schroeder, Louis Giglio

Description

The daily Suomi National Polar-Orbiting Partnership (S-NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Thermal Anomalies/Fire (VNP14A1) Version 1 data product provides daily information about active fires and other thermal anomalies. The VNP14A1 data product is a global, 1 kilometer (km) gridded composite of fire pixels detected from VIIRS 750 meter (m) bands over a daily (24-hour) period. The VNP14 data products are designed after the Moderate Resolution Imaging Spectroradiometer (MODIS) Thermal Anomalies/Fire product suite.

The VNP14A1 product provides a total of four Science Dataset (SDS) layers for the confidence of fire, maximum fire radiative power (FRP), quality assessment (QA), and position of fire within scan. Each data product file is provided in HDF-EOS5 format. A low resolution browse is also provided showing the fire mask layer with a color map applied in JPEG format.

Characteristics

Product Maturity

Validation at stage 1 has been achieved for the VIIRS Thermal Anomalies & Fire product suite. Visit the VIIRS Land Product Quality Assessment website for additional information on validation and product maturity status.

Collection and Granule

Collection

Characteristic Description
CollectionS-NPP VIIRS
DOI10.5067/VIIRS/VNP14A1.001
File Size~150 KB
Temporal ResolutionDaily
Temporal Extent2012-01-17 to Present
Spatial ExtentGlobal
Coordinate SystemSinusoidal
DatumN/A
File FormatHDF-EOS5
Geographic Dimensions1200 km x 1200 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers4
Columns/Rows1200 x 1200
Pixel Size1000 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
FireMask Confidence of fire Class 8-bit unsigned integer N/A N/A 0 to 9 N/A
MaxFRP Maximum Fire Radiative Power Megawatts 32-bit signed integer 0 N/A N/A 0.1
QA Pixel quality indicators Bit Field 8-bit unsigned integer N/A N/A 0 to 6 N/A
sample Sample number within a swath N/A 16-bit signed integer -1 N/A 0 to 3199 N/A

Fire Mask Data Set Classes

Value Label
0 not processed (missing input data)
1 not processed (trim)
2 not processed (obsolete)
3 non-fire water
4 cloud (land or water)
5 non-fire land
6 unknown
7 fire (low confidence)
8 fire (nominal confidence)
9 fire (high confidence)

Product Quality

Mappings for the QA layer and an explanation of how to interpret this information are provided under section 2.4.1 in the User Guide.

Known Issues

There are no known issues.

Documentation

Using the Data

Tools

Citation

DOI: 10.5067/VIIRS/VNP14A1.001

About the Image

The VNP14A1 thermal anomalies/fire product over the northwestern United States from August 19, 2018.