초록 ▼

A dedicated distress radiolocation system combines direction-finding techniques with calculations based on signal strength to precisely locate a distress transmission and effect rescue of the person or property in distress. The system is capable of locating a distress transmission solely on the basi

A dedicated distress radiolocation system combines direction-finding techniques with calculations based on signal strength to precisely locate a distress transmission and effect rescue of the person or property in distress. The system is capable of locating a distress transmission solely on the basis of a short duration pulse; however, for identification purposes and for communication reliability a series of pulses is transmitted. The system includes distress transmitters, a plurality of slave repeater units at known locations to receive the distress transmission and report their signal strength to a central station, a central station to calculate the distress transmitter\s location based on the measured signal strengths and the known locations of the repeater units and to dispatch a rescue unit, and rescue units equipped with direction finding equipment to approach the distress transmitter. Most actions of the system are undertaken automatically.

대표청구항 ▼

A system for locating a signal source transmitting a short duration signal from an unknown location within an area of coverage, said system comprising: receiving means at a plurality of known geographical locations for receiving the short duration signal, said receiving means including measuring mea

A system for locating a signal source transmitting a short duration signal from an unknown location within an area of coverage, said system comprising: receiving means at a plurality of known geographical locations for receiving the short duration signal, said receiving means including measuring means for developing a numerical representation of a magnitude of the received signal at each known location; and calculating means for numerically calculating, from the numerical representations and the known locations, the geographical location of the signal source.