In satellite communications, the geographical area throughout which signals may be transmitted to, or received from, a particular satellite. Within this area, the field strength of the beam from the satellite must exceed a specific value.

• 卫星通信技术中的地理区域，对一特定卫星而言，指卫星的信号可以发送到的区域或可接收到卫星信号的区域。在此区域内，来自卫星的波束场强必须超过某一特定值。