Russian BRAS-3 Hyperbolic Radio Navigation Signal | Signal Phantom
17The Russian Hyperbolic radio navigation or hyperbolic positioning, is a radio-based navigation technique that uses the time difference between signals received from two or more fixed ground-based transmitters to determine the location of a receiver. Referred to as the BRAS-3 or RS10 system. This waveform is operating on Channel 17 (fks com) with sidebands at approximately 822Hz, the system in total has 22 active channels which operate between 1652 kHz and 2116 kHz. The basic principle of hyperbolic navigation is that the receiver measures the time difference or time delay t between the arrival of signals from two or more transmitters, which are located at known positions on the ground. This difference in distance is known as the "difference range" and is given by: Difference range = c * t Where c is the speed of light. The receiver then draws a hyperbolic curve for each pair of transmitters, such that the difference range is constant along each curve. Each hyperbolic curve represents all the possible locations of the receiver that have the same difference range between the two transmitters. The receiver's actual position is determined by finding the intersection of the hyperbolic curves for multiple pairs of transmitters. The receiver's position is the point where all the hyperbolic curves intersect.
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