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1.卫星广播的特点1.1 卫星广播与卫星通信的比较从卫星通信到卫星广播,是卫星技术、无线电电子技术的进一步发展。卫星通信是用赤道同步卫星(第2.2节)上设置的小功率转发器,向很大地区(约为地球表面的三分之一)传送各种电信业务信号。由于转发器的功率小、覆盖范围大,到达地面的电波强度很低。以洲际通信的“国际通信卫星
1. Characteristics of satellite broadcasting 1.1 Comparison of satellite broadcasting with satellite communication From satellite communications to satellite broadcasting, satellite technology and further development of radio electronic technology are being developed. Satellite communications use low-power transponders installed on equatorial geostationary satellites (§ 2.2) to transmit a wide range of telecommunications services signals to large areas (about one third of the Earth’s surface). Because transponder power is small, covering a large area, the intensity of radio waves reaching the ground is very low. Intercontinental communications "International Telecommunications Satellite