通信专业英语之卫星通信英语拓展.ppt

Translation of Texts

Simply stated a satellite in a

geostationary orbital position appears

to be fixed over one portion of the earth. At

an altitude of 22,300 miles above the

equator, a satellite travels at the same

speed at which the rotates, and its motion

is synchronized with the earth’s rotation.

Even though the satellite is moving at an

Translation of Texts

赤道上空22300公里的高度上，卫星与地球以同

样的角速度运行，即它的运转与地球的自转是同

步的。尽管卫星是以很高的速度运行，对于一个

地球上的观察者而言，它总是停留在天空中的同

一个位置上。

KNOW

Translation of Texts

 The primary value of a satellite in a geostationary

orbit is its ability to communicate with ground stations

in its coverage area 24 hours a day. This orbital slot also

simplifies the establishment of the communications link

era, a ground station’s antenna had to physically track a

satellite as it moved across the sky.