低轨卫星可控式冗余分包遥测技术

随着卫星功能日趋复杂,遥测参数越来越多,处理要求越来越快,遥测设计面临越来越大的压力,必须拓展新的设计思路.本文讨论了一种低轨卫星可控式冗余分包遥测技术,更好地缓解遥测信道“瓶颈”,满足用户多样化的遥测需求,提高卫星遥测能力.该设计采用PCM（Pulse Code Modulation,脉冲编码调制）遥测和分包遥测相结合的方案,在信道资源有限,遥测参数庞大、用户需求多样的约束条件下,通过星载软件模式控制的方法实现了动态可编程遥测处理和遥测数传通道的冗余处理,提高了遥测信道的资源利用率、遥测设计的灵活性和系统的可靠性,该技术已成功应用于某在轨卫星,并被多颗在研卫星所采用.

Controllable Redundant Packet Telemetry of LEO Satellites

With the increasing functional complexity of satellites, more and more telemetry parameters, faster and faster processing requirements, telemetry design is facing increasing pressure and a new design strategy has to he found. A controllable redundant packet telemetry technology for LEO （Low Earth Orbit） satellites is proposed to alleviate the bottleneck of telemetry channels, to meet diverse user needs and to enhance satellite telemetry capability. Using a combination of PCM （Pulse Code Modulation） telemetry and packet telemetry, dynamic programmable telemetry processing and redundancy processing of the telemetry transmission channels are achieved through an on- board software mode control method to increase channel resource utilization, design flexibility and system reliability within constraints of limited channel resources, huge size of telemetry parameters and diverse user needs. The tech- nology is successfully applied in a satellite in orbit and several scientific satellites under research and development.