Downlink - The part of a satellite system that includes the satellite itself, the receiving earth station and the signal下行-卫星运行系统的一部分，包括卫星、地面接收站以及由卫星传送到地面接收站的节目信号。
The Calculation of the Orbital Parameters of a Tethered Satellite System after Tether Deployment and cut-off绳系卫星系统系绳展开及剪断后轨道参数的计算