- Abstract:
- The Phoenix digital data is comprised of image files and data log files, obtained
from on-board a Forest Service Infrared Aircraft and created either
in real-time during data collection or by post-processing the data log files.
The image files are a digital form of the original infrared strip chart images
as they were created in real-time. The varying intensities of pixels represent
the varying intensities of radiation captured by the 8-12.5 micron band detector. In
comparison with the radiation captured by the 3-5 micron band detector, points of
heat exceeding an operator-set threshold are marked along the edge and the
corresponding pixels are displayed in red.
Additional image files can be created that use the signal statistics from an entire
log file to normalize the pixel intensities, can orthorectify and geolocate every
sample to a spot on the ground, and can show the relative intensities of the signals
from the 8-12.5 micron detector and the 3-5 micron detectors in a two-color image.
The orthorectified images are created in GeoTiff and JPEG formats, and in the
Virtual Reality Modeling Language (VRML), which provides user-controllable movement
and viewing of the imagery draped over the 3-dimensional terrain.
- Purpose:
- The purpose of the Phoenix data and image products is to provide trained Infrared
Interpreters visibility of wildland fire boundaries and individual hot spots,
across large areas and within the context of the surrounding identifiable ground
features. Phoenix provides high-quality fire detection and imagery to support
active wildland fire suppression efforts.