FY-2C星地面应用分系统指令与数据获取站

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-、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.

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

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 TT&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.