This is a zoomed view of the lower right corner of the tile showing proliferate fire activity stretching from Florida northwards through Georgia and South Carolina. The progression of fires from morning to afternoon can be observed by comparing these images to the later Aqua acquisition from the same day (MYD14A1).
This image indicates prescribed burning occurring in the southern U.S. on March 8. 2007 as found in the MOD14A1 product. Using the products Fire Mask, a color code was applied to highlight fires (yellow), water bodies (blue), and land area (black). Each yellow pixel is one square kilometer.
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.
MOD14A1 is produced every 8 days at 1-kilometer resolution as a gridded level-3 product in the Sinusoidal projection. This product is unique in that it has three dimensions: fire-mask (1D) and a maximum fire-radiative-power (2D) are provided for each day (3D) in the 8-day period. For example, the fire-mask contains eight, band sequential (day) 1200 x 1200 images of fire data representing consecutive days of data collection.
The Terra MODIS instrument acquires data twice daily (10:30 AM and PM), as does the Aqua MODIS (2:30 PM and AM). 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 & Fire products have attained Validation Stage 3, which was completed using active fire reference data that were derived from ASTER and Landsat-5 TM (30 m resolution) data sources.
• Internal HDF compression reduces products to ~5% of their uncompressed size.
• Added two new SDSs (“MaxFRP” and “sample”).
• SDS "most confident detected fire" renamed as "FireMask".
• Reduced 32-bit QA to simpler 8-bit layer.
• Added global HDF attributes to simplify use of tile-level QA.
• As always, MOD14A1 products contain 8 days of data per file, but in V005, metadata are written for each day, rather than as totals for the entire 8-day period.
See Product Description
MOD14A1 FIRE MASK
|0 missing input data|
|1 not processed (obsolete)|
|2 not processed (obsolete)|
|7 fire (low confidence)|
|8 fire (nominal confidence)|
|9 fire (high confidence)|
|V005 MOD14A1 Fire Pixel Table|
|Row||16-bit unsigned integer|
|Col: column||16-bit unsigned integer|
|Sample||16-bit unsigned integer|
|T21: thermal band 21||16-bit unsigned integer|
|FRP: Fire Radiative Power||32-bit floating point|
|Confidence||8-bit unsigned integer|
|iday: which of 8 days in the period||8-bit unsigned integer|
|MOD14A1 MODIS/Terra Thermal Anomalies/Fire Daily L3 Global 1km SIN Grid|
|Science Data Sets (HDF Layers) (4 + Vdata table)||Units||Bit Type||Fill||Valid Range||Scale Factor|
|Fire mask||Class||8-bit unsigned integer||0||0 – 9||na|
|QA||Bits||8-bit unsigned integer||0 - 2||na|
|MaxFRP: Maximum Fire Radiative Power||Megawatts||32-bit signed integer||0||0 - 180000||0.1|
|Sample||Number||16-bit unsigned integer||na||0 – 1353||na|
|Fire Pixel Table||This table is stored as Vdata rather than an SDS in the product (fptab).|
|Temporal Coverage||February 24, 2000 -|
|Area||~10 degrees x 10 degrees|
|File Size||~0.5 MB|
|Dimensions||1200 x 1200 rows/columns|
|Science Data Sets (SDS HDF Layers)||4 + Vdata Table|
|Fire Mask Data Type||8-bit unsigned integer|
Please find the current MODIS-related Data policies on the MODIS Policies page at https://lpdaac.usgs.gov/products/modis_policies.
For information on how to cite LP DAAC data, please see our Data Citations page at https://lpdaac.usgs.gov/about/citing_lp_daac_and_data.
Data Pool: The Data Pool (On-line Archive) provides access to all MODIS products, and a rolling archive of ASTER level-1B products that cover the U.S. and its Territories.
Reverb: This tool provides access to a complete data record of all MODIS and ASTER products available from the LP DAAC.
GloVis: The Global Visualization interface provides access to tiled MODIS products that have an associated browse image, and all ASTER level-1B products.
MRTWeb: The MODIS Reprojection Tool Web interface provides access to all MRT services offered by the stand-alone MRT.
The Data Access section of this Web site also provides access to these interfaces.
LP DAAC User Services
U.S. Geological Survey (USGS)
Center for Earth Resources Observation and Science (EROS)
47914 252nd Street
Sioux Falls, SD 57198-0001
Phone Number: 605-594-6116
Toll Free: 866-573-3222