Abstract
Recent work in low diffraction beams has given our group some new sets of wave fields to investigate. Theoretical predictions matched experimental measurements closely, and several comparison techniques were included in the analysis. The field experiments have now been conducted at the NUWC Keyport facility and, most recently, at the University of Texas’ Applied Research Laboratory facility in Lake Travis. In cooperation with ARL, a series of low diffraction beam pulses was launched to a wide band width receiver 600 feet distant. Among the comparison methods used was a time-frequency analysis of the received pulse. For each angular position the frequency arrival times via time-frequency analysis are investigated. It is hoped this analysis will shed light on this very interesting phenomena.
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