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应用技术卫星-6(ATS-6)于1974年5月30日由美国航宇局发射进入地球同步轨道的。在西经94度的美国上空完成了一年的直接广播试验和其它试验之后,转移到东经35度为印度进行了一年的直播电视教育实验,其后卫星又回到西经140度,在美国上空成功地进行了另外两年的广播和科学实验。带有16个喷嘴的催化肼推进分系统,是最先用作三轴稳定同步通信卫星的一种小推力、带备份、多贮箱的系统。本文首先一般地叙述了与推进分系统有关的姿态控制,动量卸载和轨道转移的要求;分系统的流体力学、电气、指令和遥测、热设计,以及它的电源、质量和推进剂预算。然后详细介绍了它在轨道的运行情况、推进性能、出现的异常、加热器和推力器的故障以及为了支持继续进行实验、延长飞行寿命目前选用的另一种控制方式。
The Applied Technology Satellite-6 (ATS-6) was launched into geosynchronous orbit by the U.S. NASA on May 30, 1974. After one year of direct broadcast and other experiments over the United States over 94 degrees W, the experiment was shifted to 35 degrees east longitude for a one-year live television education experiment in India. Thereafter the satellite returned to 140 degrees west longitude at Two more years of radio and scientific experiments were successfully conducted over the United States. The catalytic hydrazine propulsion subsystem with 16 nozzles is the first to be used as a low-thrust, backup, multi-tank system for three-axis stable synchronous communications satellites. In this paper, the general requirements for attitude control, momentum unloading and orbital transfer related to propulsion subsystems are generally described. Fluid mechanics, electrical, instrumentation and telemetry, thermal design of the subsystems and their power, quality and propellant budget are described. It then details its operation in orbit, propulsion performance, anomalies that occur, the failure of heaters and thrusters, and an alternative control that is currently being selected to extend the life of the flight in support of continued experimentation.