FY-2C星地面应用分系统指令与数据获取站

Commands and Data Acquisition Station of the Ground Application Subsystem for FY-2C Meteorological Satellite

介绍了风云二号(FY-2)C星地面应用分系统数据与指令接收站(CDAS)的主要技术指标、工作流程,以及与C星的星地接口与地面应用分系统其他部分的接口。说明了CDAS的天伺馈、信道、图像获取(IAS)、三点测距(TRRR)、数据收集(DCP)、遥测遥控(TT&C)、卫星模拟器、标校、时间统一、低速信息传输(LRIT)信息编码与发送等子系统的组成与功能。阐述了C星CDAS的设计原则,以及用群调技术实现DCP的数据解调、用扩频伪码进行TRRR定位、图像处理、TT&C增加图形化界面控制、正交相移键控(QPSK)解调器抗长连“1”功能等关键技术。在轨测试和试运行期间,C星的CDAS不仅解决暴露的问题,而且进行适应性调整。验收前测试结果表明,其功能及技术指标满足业务运行要求,设备工作正常、性能稳定。

The main performances and operation flowchart of the commands and data acquisition station （CDAS） of the ground application subsystem for FY-2C meteorological satellite were introduced in this paper, and so were the interfaces with the C satellite and other parts of the ground application system. The composition and function of the 10 subsystems in CDAS for C satellite those were antenna, servo and feeding, channel, image acquisition system, trilateration range and rate ranging （TRRR）, data collection platform （DCP）, tracking, telemetry and command （TT＆C）, image and TI＆C simulator, calibration, time uniform, information coding and transmitting of low rate information transmission were described. The design principle of CDAS for C satellite was given out, and key technologies such as data demodulation of DCP implemented by group demodulation technology, TRRR positioning by spread spectrum false code, image processing, graphic interface in TT＆C, and anti ＂1＂ long chain by quadrature phase shift keying were presented. The problems of CDAS for C satellite were solved and adaptability adjustment was completed during the periods of on-orbit test and experimental operation. The test result before approval showed that the function and performance of CDAS for C satellite had met the requirement for operation, which operated normally and stably.