| 摘要 |
<p>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 (10), a plurality of slave repeater units (20) at known locations to receive the distress transmission and report their signal strength to a central station (30), a central station (30) to calculate the distress transmitter's location based on the measured signal strengths and the known locations of the repeater units and to despatch a rescue unit (40) and rescue units (40) equipped with direction-finding equipment to approach the distress transmitter. Most actions of the system are undertaken automatically.</p> |
