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These images represent fires identified between May 1 - 8, 2007, an 8-day period during which the northern plains of the U.S. experienced numerous wildfires attributed to prolonged drought conditions. This image is the entire tile h11v04 along the Canadian border with North Dakota, Minnesota, and Wisconsin. Zooming in on the upper left quadrant of the tile, prominent fires surround North Dakota's Lake Sakakawea, a reservoir along the Missouri River.
Using the MYD14A2 Fire Mask, a color code was applied to highlight fires in yellow, water bodies in blue, and land area in black. Each yellow pixel is 1km2.
MODIS Thermal Anomalies/Fire products are primarily derived from MODIS 4- and 11-micrometer radiances. The fire detection strategy is based on absolute detection of a fire (when the fire strength is sufficient to detect), and on detection relative to its background (to account for variability of the surface temperature and reflection by sunlight). Numerous tests are employed to reject typical false-alarm sources like sun glint or an unmasked coastline.
MYD14A2 data are 8-day fire-mask composites at 1-kilometer resolution provided as a gridded level-3 product in the Sinusoidal projection. Science Data Sets include the fire-mask and algorithm quality.
The Aqua MODIS instrument acquires data twice daily (1:30 PM and AM), as does the Terra MODIS (10:30 AM and PM). These four daily MODIS fire observations serve to advance global monitoring of the fire process and its effects on ecosystems, the atmosphere, and climate.
Version-5 MODIS Thermal Anomalies and Fire products have attained Validation Stage 3, which used active fire reference data that were derived from ASTER and Landsat-5 Thematic Mapping (30 m resolution) data sources.
See Product Description
Science Data Sets for MODIS/Aqua Thermal Anomalies/Fire 8-Day L3 Global 1km SIN Grid V005 (MYD14A2):
Science Data Sets (HDF Layers) (2)
|Fire mask||Class||8-bit unsigned integer||0||0–9|
|QA||Bits||8-bit unsigned integer|
|Temporal Coverage||July 4, 2002 -|
|Area||~10 x 10|
|File Size||~0.4 MB|
|Dimensions||1200 x 1200 rows/columns|
|Science Data Sets (SDS HDF Layers)||2|
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The Data Access section of this Web site also provides access to these interfaces.
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