Experimental Receiver-Indicator for Common-Frequency RADUX
Abstract
Radux is a long-range radio-navigation system in which position is determined by the intersection of loci of constant phase between synchronized low-frequency modulation signals transmitted from distant stations, utilizing sky-wave propagation. The system, as proposed by J. A. Pierce, consists of several synchronized low-frequency transmitters operating in a single radio-frequency channel on a timesharing basis. During 1951 and 1952 an experimental Radux system was put into operation. The Naval Research Laboratory developed techniques for the common-frequency receiver-indicators and supplied six experimental monitors which were constructed at this Laboratory. The receiver -indicator consists of a single radio-frequency channel receiver, a synchronous switch for separating the demodulated signals, and a mechanical servo-driven differential phase-shifting means for measuring and indicating the phase difference. The present report describes the basic principles and techniques of the equipment, which has been used to show that the system operation is in agreement with the predictions of J. A. Pierce's proposal. It is recommended that navigator's equipment be developed for operational use in accordance with plans and decisions as formulated by the Radux Steering Committee.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 20, 1955
- Accession Number
- AD1222135
Entities
People
- A. E. Craig
- J. W. Brogden
- R. T. Ertman
Organizations
- United States Naval Research Laboratory