LP DAAC Homepage
Home About Products Data Tools Order Data News Help/Edu Links Contact Us

EDG Data Set Name Granule Shortname
MODIS/Aqua Thermal Anomalies/Fire Daily L3 Global 1km SIN Grid V005 MYD14A1

Version Acquisition Range Science Quality Status
003 August 29, 2002 - October 7, 2002 Provisional from 11/01/2000
004 July 4, 2002 - December 31, 2006 Provisional
005 July 4, 2002 - Validated Stage 1

V005 MYD14A1 Changes (abbreviated Points of Interest below)
V005 MYD14A1 Science Data Sets (specifications for data layers)
V005 MYD14A1 Quality Information

graphics1 graphics2
Data Characteristics
Area: ~10 degrees x 10 degrees
Dimensions: 1200 x 1200 rows/columns
File Size: ~0.5 MB
Resolution: 1 kilometer
Projection: Sinusoidal
Fire Mask Data Type: 8-bit unsigned integer
Data Format: HDF-EOS
Science Data Sets (SDS HDF Layers): 4 + Vdata table
Dimensions: 3 ( row x column x day)		 The above images display indications of prescribed burning occurring in the southern U.S. on March 8. 2007 found in the MYD14A1 product.

Using the product's Fire_Mask a color code was applied to highlight fires in yellow, water bodies in blue, and leaving land area in black. Each yellow pixel is 1km2.

The image on the left is the entire tile h10v05, including most noticeably the Mississippi River, and portions of the surrounding southern States. On the right 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 earlier Terra acquisition from the same day (MOD14A1).

V005 Change Points of Interest:

  • 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,MYD14A1 products contain 8 days of data per file, but in V005 metadata is written for each day, rather than as totals for the entire 8-day period.

    • Product Description
    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.

    MYD14A1 is produced every 8 days at 1-kilometer resolution as a gridded level-3 product in the Sinusoidal projection. It 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 (day) sequential, 1200 x 1200 images of fire data representing consecutive days of data collection.

    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/Aqua Thermal Anomalies/Fire products are Validated Stage 1, meaning that accuracy has been estimated using a small number of independent measurements obtained from selected locations and time periods and ground-truth/field program efforts. Although there may be later improved versions, these data are ready for use in scientific publications.


    View Printer Friendly Version

    Retrieve the MYD14A1.5 MODIS product through the LP DAAC Data Pool
    Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MYD14A1.5&group=MOLA
    Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLA/MYD14A1.005/

    Order Data through the EOS Data Gateway
    (http://edcimswww.cr.usgs.gov/pub/imswelcome/)

    EOS Data Gateway Search Tips
    Data Center: LPDAAC
    Sensor: MODIS
    Dataset: MODIS/Aqua Thermal Anomalies/Fire Daily L3 Global 1km SIN Grid V005
    Geographic Extent: Type Lat/Long Range or Draw on Map
    Temporal Extent: 2002-07-04 to present

    Product Information
    Product Description
    http://modis-land.gsfc.nasa.gov/fire.htm
    User Guide
    http://modis-fire.umd.edu/MOD14.asp
    Algorithm Theoretical Basis Document (ATBD)
    http://modis.gsfc.nasa.gov/data/atbd/atbd_mod14.pdf
    MODIS Standard Data Products Catalog
    (http://modis.gsfc.nasa.gov/data/dataprod/index.php)
    EOS Data Products Handbook Volume 1 (2000)
    (http://eospso.gsfc.nasa.gov/eos_homepage/for_scientists/data_products/vol1.php)

    Contact Information
    LP DAAC User Services
    U.S. Geological Survey (USGS)
    Earth Resources Observation and Science Center (EROS)
    47914 252nd Street
    Sioux Falls, SD 57198-0001
    Phone: 605-594-6116
    Toll Free:  866-573-3222

    		866-LPE-DAAC
    Fax: 605-594-6963
    Email: LPDAAC@eos.nasa.gov
    Web: http://LPDAAC.usgs.gov

    LP DAAC EROS Home About Products Data Tools Order Data News Help/Edu Links Contact Us
    This site is hosted by the USGS - NASA Distributed Active Archive Center
    U.S. Government: Public Information Exchange Resource
    NASA: Privacy Policy and Important Notices
    USGS: Privacy Statement, Disclaimer, Accessibility, FOIA
    DOI: Privacy Statement, Privacy Disclaimer, No FEAR Act, FOIA,
    Performance Plan, Children's Privacy
    URL: http://LPDAAC.usgs.gov/modis/myd14a1v5.asp
    Technical Contact: LPDAAC@eos.nasa.gov
    Last Update: Friday, April 11, 2008
    Download Adobe Acrobat Reader    		 Link to USA.gov