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An Experimental 600-Foot Sonic Delay Line for the Navy Space Surveillance System

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1 Author(s)
Kaufman, Maxime G. ; U.S. Naval Research Laboratory Washington, D. C.

Since the Navy Space Surveillance System operates continuously, there is a large yearly expenditure for recording paper. It was suggested that the recorders be turned on only during a satellite "pass" providing enough signal delay could be introduced so that the recorders could overcome their starting inertia. The requirement for delaying the composite (IRIG) FM telemetering signals from a Space Surveillance site by one-half second was fulfilled by converting the phone line frequencies into sound, which is then transmitted through a pipe long enough to provide the desired delay, and then reconverted into electrical signals for transmission over the line. The results of the experiment were satisfactory.

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Aerospace, IEEE Transactions on  (Volume:1 ,  Issue: 2 )