Title: Navigation aiding systems with one-way ranging and two-way synchronization

Abstract: A navigation aiding system primarily for aircraft consists of a number of spaced apart ground stations. A ranging signal is transmitted to each of a number of aircraft in turn in response to received interrogation signals. The system allows a clock carried by each aircraft to be accurately synchronised with a master clock on the ground to permit the range to be measured precisely.

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Inventors: Pudsey, David Graham (Rayleigh, EN)

Application Number: 339585
Filing Date: 1973-03-09
Publication_date: 1976-03-09
Assignee: Elliott Brothers (London) Limited (London, EN)
Primary Class(es): 342/33 342/31, 342/46
Other Classes:
US Patent Ref:

2536496	Jan, 1951	Falloon	343/5.
3119107	Jan, 1964	Maresca	343/6.
3262111	Jul, 1966	Graham	343/7.
3336591	Aug, 1967	Michnik et al.	343/6.
3412399	Nov, 1968	Chisholm	343/6.
3594799	Jul, 1971	Michnik	343/6.
3662391	May, 1972	Brown	343/5.

Other Refs:
Primary Examiner: Wilbur, Maynard R.
Assistant Examiner: Montone, G. E.
Attorney: Baldwin, Wight & Brown