Ray Wasky

A state-of-the-art 3-dimensional high frequency (HF) propagation model is used to model the effects of ionospheric tilt, to determine the degree to which off-azimuth propagation exits in the HF band (3-30 MHz).  Off-azimuth propagation, where an HF signal travels out of the great circle plane between an OTHR and its intended target region, can create errors in determining the azimuthal position of airborne and surface ship targets, especially if these errors are greater than the azimuth beamwidth of the radar.  These errors can vary as a function of transmission frequency, time of day, solar cycle sunspot number, elevation angle, and range to target.

Biography:

Formerly with the Johns Hopkins University Applied Physics Laboratory, various DoD contractors, Air Force Avionics Lab at WPAFB, and active duty with the US Army Missile Command.  Extensive experience in electromagnetic propagation phenomenology, propagation modeling, radar systems engineering, space weather effects, and meteorological instrumentation.  Wide-ranging field experience in radar and infrared/laser signature and propagation measurements, SAR calibration, and EO/IR missile seeker testing.  Bachelors in E.E., Cleveland State University; M.S.E.E., University of Dayton; Post-graduate studies in E.E., The Ohio State University.  Member U.S. National Committee for the International Union for Radio Science, Commission F; Life Member, Institute of Electrical and Electronics Engineers; Associate Editor, IEEE Antennas & Propagation Magazine.

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