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Acknowledgments I am deeply indebted to my thesis advisor and mentor, Professor Kirk A. Mathews. His guidance and insight have been priceless throughout this research project. He never failed to make time for me as I progressed in my growth as a graduate student. Dr. Mathews was a coach, a cheerleader, a fellow researcher, and an inspiration. Without his assistance, I never could have accomplished the work I set out to do. Mr. A. Robert Frederickson; from the Geophysics Directorate at the USAF Phillips Laboratory at Hanscom AFB, MA; was the sponsor for my research. His assistance with the initial stages of the literature review provided information critical to the success of my project. For Mr. Frederickson's help with the definition of the problem and quantification of the instrument response functions, I am grateful. The successful completion of this task relied heavily on the support I received from my faithful companions in the trek through life, Bill and Ed. Their loyalty and quality of companionship are without equal. May the mice of their dreams always be plump, lethargic, and not very bright