Emergency locator transmitter incident time correlator

Details Emergency locator transmitter incident time correlator Emergency locator transmitter incident time correlator

G - Physics

01

S

325/50, 343/99

G01S 1/00 (2006.01) G01S 1/68 (2006.01) G08B 25/01 (2006.01)

Patent

CA 1145016

EMERGENCY LOCATOR TRANSMITTER INCIDENT TIME CORRELATOR ABSTRACT: In an emergency locator transmitter of a type wherein a standard distress signal is transmitted following a distress incident, the distress signal is encoded with data identifying the absolute time of the incident or the amount of time that has elapsed since the incident occurred. Distress waveform modu- lation of the carrier is periodically interrupted for insertion of the time signal. In a preferred embodiment, wherein the distress signal includes information burst signals that are periodically transmitted, e.g., every 50 seconds, timing pulses generated synchronously with the burst signals are supplied to a divider circuit for division by a predetermined integer to develop extended time base pulses, e.g., one hour pulse intervals. The extended pulses are accumulated in a binary counter and combined with the information burst signals.

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