对三颗同步卫星覆盖全球的质疑和讨论

A Question and Discussion about Three Geostationary Satellites Covering the Earth

对近10年来7种高校物理教科书中关于3颗同步卫星可覆盖全球的说法和相关示意图提出质疑,并进行讨论。

This paper raises a question on three geostationary satellites covering the earth, which has becn accepted in the physics textbooks in universities for almost ten years, and makes thorough discussions about it.