中继卫星系统应用效能提升技术

摘要

为了提高中继卫星系统服务用户星的数量和响应速度，在现有的中继卫星服务模式基础上，提出了中继卫星伴随测控和中继定点指向策略的设想。伴随测控利用中继卫星星间S/Ka单址天线波束差异和用户星轨道交叉特性，在中继卫星为一个用户星提供中继服务的同时，为星间天线波束内的另一颗用户星提供测控服务，增加了中继服务数量，可以提高中继卫星利用率约8％。针对使用定向天线中继终端的快速测控和数据传输需求，通过设计合理指向点和执行应急策略，提出的中继定点指向策略可以将近地卫星的最快响应时间压缩为原来的1/14。结果表明，这两项技术可以有效地提升现有中继卫星系统的应用效能。%Based on the current tracking and data relay satellites system (TDRSS), a satellite companion control strategy was presented. It takes the advantage of the coverage difference between Ka-band and S-band of a TDRS′inter-satellite antenna to provide data relay service for two user satellites simultaneously. When these two satellites are covered by the TDRS′s antenna, one user satellite can be serviced in Ka-band and the other one can be serviced for telemetry and telecommand control in S-band. As a result, the efficiency of a TDRS′usage can be improved by 8%.Meanwhile,in order to provide quick service for a user satellite with an emergency service demand,a hand-shaking waiting strategy which compressed the response time to 1/14 of the previous one was proposed.These innovative technologies can improve the usage efficiency of the TRDSS application.