Under the Air Force program, OKSI is developing two computer models. One solves the "forward" problem, i.e., predicting the sensor signal under specified environmental parameters. The second, addresses the "inverse" problem, under which the unknown compounds are identified, given the sensor's measurements. A "smeared line" model is used in the algorithms to model spectral signature of compounds of interest. Spectra of compounds included in the model's database were obtained from the EPA's spectral library of Hazardous Air Pollutants (HAPs), and were de-resolved to match the spectral resolution of TIRIS. The model uses the NPIC library for terrain background spectra.
Acquired by an airborne imaging spectrometer, and using GPS, the TIRIS spectral imagery can be directly tied to Geographical Information Systems (GIS), for accurate geolocation. This may be extremely important for emergency response, plume tracking, and battle field management.
Some of the activities mentioned here can be found in the "Hyperspectrum" newsletter, published by OKSI.
Nahum Gat, Ph.D., President
Opto-Knowledge Systems, Inc. (OKSI)
19805 Hamilton Avenue
Torrance, CA 90502
Phone: 310/756-0520, Fax 310/756-0511