Fire Data Sources

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Many sources of weather, terrain, and fuel data for initialization, assimilation, and verification are freely available through public sites, many in the form of files viewable in Google Earth. Fire ignition tim/location data and imagery of fire extent at later times for specific incidents is still generally in the form of custom datasets where research or suppression teams were available to collect it.

Fuel Maps

10-hr Dead Fuel Moisture

Live Fuel Moisture

Fire Ignition Time and Location Data

  • Custom

Fire Perimeters

Fire Detection

MODIS Data:

MOD14 Files:

Level 2 active fire data (750(?)m resolution) from the MODIS instrument on the Terra satellite (Aqua satellite also has a MODIS instrument, that fire data is under MYD14 with the same properties). Contains 4 fields important for our purposes:

  • fire_mask: Array containing sensor data for each pixel. Classes:
    • 0 missing input data
    • 1 not processed (obsolete)
    • 2 not processed (obsolete)
    • 3 non-fire water
    • 4 cloud
    • 5 non-fire land
    • 6 unknown
    • 7 fire (low confidence)
    • 8 fire (nominal confidence)
    • 9 fire (high confidence)
  • FP_latitude: Variable length vector (the number of pixels identified as firepixels) containing latitude of all firepixels in the mask.
  • FP_longitude: Variable length vector (the number of pixels identified as firepixels) containing longitude of all firepixels in the mask.
  • FP_confidence: Variable length vector (the number of pixels identified as firepixels) containing confidence of fire identification for each firepixel in the mask.

These can be found at: ftp://ladsweb.nascom.nasa.gov/allData/6/MOD14/

(The files here are delivered in 5 minute intervals, and are organized by year, then by Julian Day Number (n corresponds to the nth day of the year).)

MOD03 Files:

Level 1 geolocation data from the MODIS instrument on the Terra satellite (Aqua satellite also has a MODIS instrument, that fire data is under MYD14 with the same properties). Contains 2 fields important for our purposes:

  • Latitude: Array (same size as fire_mask) containing the latitude of each pixel in the firemask
  • Longitude: Array (same size as fire_mask) containing the longitude of each pixel

These can be found at: ftp://ladsweb.nascom.nasa.gov/allData/6/MOD03/

(The files here are delivered in 5 minute intervals, and are organized by year, then by Julian Day Number (n corresponds to the nth day of the year).)

VIIRS Data:

VNP14IMG_NRT files:

Level 2 active fire data (375m resolution) from the VIIRS instrument on the Suomi-NPP Satellite. Contains 4 fields important for our purposes:

  • fire_mask: Array containing sensor data for each pixel. Classes (Note: these are different than the MOD14 fire mask classes):
    • 0 (will be added later)
    • 1
    • 2
    • 3
    • 4
    • 5
    • 6
    • 7
    • 8
    • 9
  • FP_latitude: Variable length vector (the number of pixels identified as firepixels) containing latitude of all firepixels in the mask.
  • FP_longitude: Variable length vector (the number of pixels identified as firepixels) containing longitude of all firepixels in the mask.
  • FP_confidence: Variable length vector (the number of pixels identified as firepixels) containing confidence of fire identification for each firepixel in the mask.

These can be found at: ftp://nrt3.modaps.eosdis.nasa.gov/allData/5000/VNP14IMG_NRT/

They are held behind a password wall, registration is easy at https://urs.earthdata.nasa.gov/users/new

(These files are delivered in 6 minute intervals, and are organized by year, then by Julian Day Number (n corresponds to the nth day of the year).)

NPP_IMFTS_L1 files:

Level 1 geolocation files (375m resolution) from the VIIRS instrument on the Suomi-NPP Satellite. Contains 2 fields important for our purposes:

  • Latitude: Array (same size as fire_mask) containing the latitude of each pixel in the firemask
  • Longitude: Array (same size as fire_mask) containing the longitude of each pixel

These can be found at: ftp://ladsweb.nascom.nasa.gov/allData/5000/NPP_IMFTS_L1/

No password this time.

(The files here are delivered in 6 minute intervals, and are organized by year, then by Julian Day Number (n corresponds to the nth day of the year).)

Algorithms, investigations, etc

This section will contain a discussion of the generation and structure of our files to be used with the wrfxpy

This section will contain extra information to help find other viirs/modis data and tools to view the internal structures of HDFs. Later will add average file sizes and other info.

Perhaps a way to only grab parts of the HDFs from the servers? http://hdfeos.org/software/hdf5_handler.php

To be continued...

Fire Location and Intensity Data

See Also

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