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THE ARTEMIS SATELLITE UNEXPECTED TRIP TO GEO ORBIT

机译：ARTEMIS卫星意外到达地球轨道

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This paper presents the experience of an around-the-earth journey performed by the ESA GEO platform satellite ARTEMIS to reach its GEO location after a failed launch injection performed by ARIANNE 5 Flight 142 on 12th of July 2001. The nominal mission timeline of ARTEMIS was originally planned to start from the nominal Arianne launch orbit of 35,837-km apogee and 857-km perigee and with an inclination of around 2°. On the 12th of July, Arianne 5, after its third-stage ignition failure, let ARTEMIS at an apogee of 17,518 km and a perigee of 592 km and an inclination of around 3°, half a way distant from the originally planned delivery orbit. The paper shows how the Alenia Spazio Project Team answered to this situation with a Recovery Mission composed of five-perigee kick LAE burns and three-apogee LAE burns to put the S/C in a safe circular parking orbit of 31,000-km altitude and with a final 5000-km orbit raising transfer maneuver using the ion propulsion thruster system carried on-board for station-keeping maintenance purposes. Also, it is described of the new AOCS operative mode that has been designed, tested, and uploaded within 6 months, and it has allowed the satellite to be controlled in a new attitude needed to permit the ion thrusters to be used for the orbit raising till GEO location arrival. The paper will report also some of the results of the numerous analysis conducted on the S/C, such as the effects of the low-orbit van Allen belt crossings (about 60 times) on the on-board computer and the effects of degradation on the stowed solar panels.
机译：本文介绍了在2001年7月12日ARIANNE 5航班142进行一次发射失败后，ESA GEO平台卫星ARTEMIS进行了一次环球之旅以到达其GEO位置的经历。ARTEMIS的名义飞行任务时间表是最初计划从标称的35,837公里远地点和857公里近地点的阿里安娜发射轨道开始，并倾斜约2°。 7月12日，阿丽亚娜5号在其第三阶段点火失败后，让其最高点达到17,518公里，近地点592公里，倾角约为3°，距离原定的发射轨道有一半的距离。该文件显示了Alenia Spazio项目小组如何通过由五近距踢LAE燃烧和三近距LAE燃烧组成的恢复任务，将S / C置于31,000 km高的安全圆形停车轨道上并使用机载的离子推进推进器系统进行的最后5000公里轨道上升转移演习，用于车站维护。此外，还介绍了在六个月内设计，测试和上传的新AOCS操作模式，它已使卫星以所需的新姿态进行控制，以允许将离子推进器用于升轨。直到GEO位置到达为止。本文还将报告在S / C上进行的大量分析的一些结果，例如低轨道范艾伦带穿越（约60次）对车载计算机的影响以及降级对卫星的影响。收起的太阳能电池板。

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