Abstract

The paper describes an extension to the Tracer technique for monitoring and tracking the positions of remote and unattended objects, allowing the signals transmitted by Decca Navigator stations to be used. The problems of retransmitting the multi-frequency Decca Navigator signals have been overcome by receiving a single frequency and decoding the time-multiplexed ‘multipulse’ signals in time-division form.A number of applications of the system are described and results presented. The accuracy, fix repeatability and skywave sensitivity of the system are seen to compare favourably with those of conventional receivers.

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