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| Number | Title | Issue Date |
| 5537318 | Lightning strike detection and mapping system A lightning strike detection and mapping system which determines the range and bearing of each valid lightning strike by (1) computing the Fourier Transform, and more preferably the discrete Fourier Transform (DFT) of the X and Y waveforms, classifying th... | 07/16/1996 |
| 5477225 | Method and apparatus for associating target replies with target signatures Apparatus for associating target reply signals with target signatures, wherein each reply signal is received from a target transponder within a selectable time period, and further wherein each target signature comprises a first set of parameter values tha... | 12/19/1995 |
| 5463398 | Method and apparatus for multiple reply rejection when decoding transponder replay signals Apparatus for rejecting multipath reply signals received from a target transponder within a selectable time period, comprising: a top antenna and a bottom antenna to detect reply signals; means for determining an altitude code associated with each reply s... | 10/31/1995 |
| 5387915 | Method and apparatus for detecting and decoding transponder reply signals Methods and apparatus for detecting and decoding transponder reply signals of the type having a plurality of associated time discrete pulses including two bracket pulses and a number of related data pulses that may have been transmitted at discrete data t... | 02/07/1995 |
| 5295071 | Sampled data lightning strike detection and mapping system capable of generating frequency spectrum of input signal waveforms and displaying such on the mapping display A sampled data lightning strike detection and mapping system receives a signal waveform representative of a lightning strike and other electrical activity and samples the waveform to generate a train of data samples representative thereof. The data sample... | 03/15/1994 |
