Transient event data acquisition apparatus for use with radar sy

Details Transient event data acquisition apparatus for use with radar sy Transient event data acquisition apparatus for use with radar sy

1975-01-24

1976-08-03

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 5PC, 343 6R, 343 12R, G01S 960

Patent

active

039732584

ABSTRACT:
The apparatus detects in real time the amplitude and range of certain traent events such as lightning discharges, the arrangement being such that a transient event which is capable of producing a return echo signal initially greater than other return signals is detected and the amplitude and range acquired in a manner which permits recording on moderate speed recording devices. A conventional sample and hold circuit acquires the range and its output gates a peak detector into "on" and "off" modes with the "on" period being centered about the range acquired by the sample and hold circuit. The "on" period is of relatively short duration and, importantly, the output acquired during the "on" period is held by the peak detector circuit until the initiation of the next transmitter pulse. The range output of the sample and hold circuit also is held for a predetermined length of time or until another transient event occurs. The `hold` periods permit the use of moderate speed recording devices. Consequently, amplitude and range are processed in real time and applied to the recorder. A photodiode also is used to view the space illuminated by the radar beam. This optical detection triggers both the peak detector and the sample and hold circuit and, additionally, is applied to the recorder to verify the relationship between the event and the recorded data.

REFERENCES:
patent: 3508259 (1970-04-01), Andrews

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