本刊在2011年第4期上刊登了《有关地球同步卫星的七个问题》,文章中的第5个问题认为要实现全球通信,至少需发射对称分布的3颗地球同步卫星.笔者认为这个观点不够严格,现表述如下:如图1所示,θ在原 The issue of “Seven Issues Related to Geostationary Satellites” was published in the fourth issue of 2011. The fifth issue in the article considers that at least three geostationary satellites that are symmetrically distributed must be launched in order to achieve global communications. The view is not strict enough, is now described as follows: As shown in Figure 1, θ in the original