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随着科学技术的飞速发展,在赤道以上36000公里的亚太地区上空,用于通信与广播电视的卫星目前已有70多颗(据不完全统计)。能发送的模拟和数字节目有数百套之多,同时还可发送很多音质优美的广播节目以及可与调频广播媲美的立体声音乐节目。仅亚洲2号卫星未加密数字电视节目就有30多套,另外还有几十套广播节目。目前,利用小型接收天线系统能清晰收看节目的卫星就有10多颗。可以说赤道上空群星灿烂,广播电视节目异彩纷呈。据统计,大量的节目主要分布在C频段(4GHz)和Ku频段(12GHz)广播电视卫星上。由于近年来发射的卫星转发功率不断加大,有多颗
With the rapid development of science and technology, more than 70 satellites for communications and radio and television broadcasting (based on incomplete statistics) are currently flying over 36,000 kilometers above the equator in the Asia-Pacific region. There are hundreds of analog and digital programs that can be sent, as well as many good-sounding broadcasts and stereo music programs comparable to FM radio. Only Asia No. 2 satellite unencrypted digital television programs have more than 30 sets, in addition to dozens of radio programs. At present, there are more than 10 satellites that can clearly watch a program using a small receiving antenna system. Can be said that the stars above the equator splendid, radio and television programs colorful. According to statistics, a large number of programs are mainly distributed in C-band (4GHz) and Ku-band (12GHz) radio and television satellites. As more and more satellite transmit power has been launched in recent years, how many pieces?