JPSS1 Product Descriptions: VJ114IMG
Last update: October 25, 2023
Data Set Short Name:
VJ114IMG_NRT
Data Set Long Name:
VIIRS/JPSS1 Active Fires 6-Min L2 Swath 375m NRT
Platform:
Joint Polar-orbiting Satellite System-1 (JPSS-1; now NOAA-20)
Instrument:
Visible Infrared Imaging Radiometer Suite (VIIRS)
Product Description:
The VJ114IMG_NRT is a Near Real Time (NRT) JPSS1/VIIRS 375 m active fire detection data product (Schroeder 2014). The product is built on the EOS/MODIS fire product heritage [Kaufman et al., 1998; Giglio et al., 2003], using a multi-spectral contextual algorithm to identify sub-pixel fire activity and other thermal anomalies in the Level 1 (swath) input data. The algorithm uses all five 375 m VIIRS channels to detect fires and separate land, water, and cloud pixels in the image. Additional 750 m channels complement the available VIIRS multispectral data. Those channels are used as input to the baseline active fire detection product, which provides continuity to the EOS/MODIS 1 km Fire and Thermal Anomalies product.
The VIIRS 375 m fire detection data is a 6-min Level 2 swath product based on the input Science Data Record (SDR) Level 1 swath format. The NRT product is currently available through NASA's Land, Atmosphere Near real-time Capability for EOS (LANCE). The data are formatted as HDF4 files (data in HDF5 format may be available at a later date). Complementary ASCII files containing the short list of fire pixels detected are also available through LANCE processing systems.
file_naming_convention = "VJ114IMG_NRT.AYYYYDDD.HHMM.CCC.YYYYDDDHHMMSS.hdf
- AYYYYDDD = Acquisition Year and Day of Year
- HHMM = Hour and minute of acquisition
- CCC = Collection version number
- YYYYDDDHHMMSS = Production Date and Time
- hdf = Hierarchical Data Format (version 4)
For more information read VIIRS 375 m Active Fire User Guide
and
Schroeder, W., Oliva, P., Giglio, L., & Csiszar, I. A. (2014). The New VIIRS 375m active fire detection data product: algorithm description and initial assessment. Remote Sensing of Environment, 143, 85-96. doi:10.1016/j.rse.2013.12.008 PDF from UMD
or visit VIIRS Active Fire Web page
Production Frequency:
240 file per day
Spatial Coverage:
Global
Spatial Resolution:
375m
File Size (MB):
~2
Citation:
Dataset Originator/Creator:
NASA JPSS1 Land Science Team/MODIS Adaptive Processing System (MODAPS)
Data Authors:
Wilfrid Schroeder
Dataset DOI:
https://doi.org/10.5067/VIIRS/VJ114IMG_NRT.002
