| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: broadcast and public announcement system using navigation satellites, comprising a broadcast centre and a unit for generating emergency information, connected through a generating unit with a transmitting ground-based satellite station, at a geostationary satellite - a unit for receiving ground signals, connected to an intersatellite communication unit, at navigation satellites - series-connected intersatellite communication receiving equipment, a unit for converting a signal into an L-range signal and a transmitting unit. A user receiving device is connected through a broadcast signal demodulating unit with a sound reproducing unit and through a warning signal demodulating unit with an emergency display unit.EFFECT: facilitating broadcast and public announcement on emergency situations at any point on the Earth.1 dwg |
