Geostationary orbit / 地球静止轨道

Geostationary orbit

Today's little grandson
Read the encyclopedia in the living room very seriously
I'm bored
Also took a copy to read
Saw this "Geostationary Orbit"

The satellite in the sky
Not standing still
But it moves with the rotation of the earth
Because the speed is the same, it looks like it is still.

Geostationary orbit, or geostationary orbit (geostationary orbit, abbreviation: GEO).
It refers to a circular orbit of 35786km above the earth’s equatorial plane. The satellite moving in this orbit will move in the same direction as the earth’s rotation. As long as the same speed is maintained, the satellite will look like Stand still.

Therefore, as long as the antenna of the ground station is aligned with this position, it can communicate without rotating the antenna.

It turns out that I don’t know or don’t know. After I understand, I feel very strange.
Why it be need = in that height?

地球静止轨道

今天的小孙子
很认真的在客厅看百科全书
我无聊之下
也拿了一本来翻阅
看到了这个 "地球静止轨道"

原来天上的那个卫星
并不是静止不动的
而是跟着地球的自转来一起动
因为速度一样, 所以看起来, 好像是静止不动.

地球静止轨道，或称地球赤道同步轨道 (geostationary orbit，简写：GEO）。
指的是地球赤道面上方35786km的圆形轨道，在这个轨道上所运行的卫星，运行方向将会和地球自转的方向一致，只要保持着相同的速度，从地面看过去，卫星就会像是静止不动。

因此之故，地面站的天线只要对准该位置，就可以通讯，并不需要转动天线。

原来如此，不了解不知道，了解之后，觉得很奇妙，为什么要刚好是那个高度呢?