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MODIS/VIIRS Burn Scar Data

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MODIS/VIIRS Burn Scar Data:

MODIS and VIIRS burn scar data are provided at a spatial resolution of 500 meters and attributed with the

approximate day of burning on a per pixel basis (VIIRS burn scar data are oversampled from the native 750 meter

resolution). These products are similar to the official MODIS 500 meter burned area product (MCD45A1), but are

based on a different algorithmic approach. The algorithm employed for this product is an automated hybrid

algorithm developed by Dr. Louis Giglio, and currently implemented as an Alpha product in the International Polar

Orbiter Processing Package (IPOPP) by the NASA Direct Readout Laboratory (DRL). Both IPOPP and the MODIS and

VIIRS burn scar science processing algorithms are utilized operationally within the direct readout processing

framework managed by the USDA Forest Service Active Fire Mapping Program.

The MODIS burn scar algorithm leverages as inputs daily composite datasets derived from daily Terra and Aqua

MODIS observations. These include daily MODIS 500 meter corrected reflectance (CREFL) composites, and daily

composites of MODIS 1km active fire detection data. The algorithm conducts time series analyses on vegetation

index data, derived from composited reflectance data, in the context of active fire detections to identify areas of

change due to fire.

The VIIRS burn scar algorithm leverages as inputs daily composite datasets derived from daily Suomi NPP

observations. These include daily 750 meter corrected reflectance (CVIIRSM) imagery, and daily 750 meter

VIIRS-AF active fire detection data. The algorithm conducts time series analyses on vegetation index data, derived

from daily reflectance data, in the context of daily active fire detections to identify areas of change due to fire.

Due to the data and analysis requirements associated with the MODIS and VIIRS science processing algorithms to

yield reliable burn scar products, the burn scar data are not available in near real-time. Currently, MODIS and VIIRS

burn scar data are compiled by the Active Fire Mapping Program as monthly datasets are typically available

approximately 10 days after the beginning of each month. The burn scar data are provided as monthly GeoTiff and

KMZ products for the specified geographic regions.

Please note that the completeness of these and other products provided by the Active Fire Mapping Program is

subject to anomalies typically associated with the acquisition of satellite direct broadcast data (i.e. temporary data

outages, lack of comprehensive data coverage, etc.). Please read the metadata associated with each of the burn

scar datasets for additional product details and caveats.

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MODIS/VIIRS Burn Scar Data http://activefiremaps.fs.fed.us/burnscar.php

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