Understanding the debris population at GEO and the fate of elderly satellites

了解 GEO 的碎片数量和老卫星的命运

• 批准号: ST/R005125/1
• 负责人: Don Pollacco
• 金额: $ 34.63万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FR005125%2F1
• 关键词: Understanding; debris; population; GEO; fate

Geostationary satellites carry our TV channels, weather monitoring and communications (and military observations), and are a vital resource as we develop space technologies. Their altitude of 36000km has always suggested that the effects of debris would be small. However, in the last few months 2 geostationary satellites have literally broken apart. Furthermore, as spacecraft at GEO are too distant to de-orbit, towards the end of their operational lifetimes they are ejected out of the GEO into the so-called graveyard orbits. Here they are literally turned off and left to age. What happens to them past this point is conjecture: it is expected that they age and given the hostile space environment this itself could lead to breakup. However we are starting to expect that these spacecraft can be differentially acted upon by the solar wind, hence causing the spacecraft to start spinning. On a short timescale this could also lead to breakup.This proposal is about identifying the constitution of the debris field at GEO and also studying the effects of radiation field on the state of elderly satellites.

地球同步卫星承载着我们的电视频道、天气监测和通信(以及军事观测)，是我们发展空间技术的重要资源。它们36000公里的高度一直表明碎片的影响很小。然而，在过去的几个月里，两颗地球同步卫星实际上已经解体。此外，由于地球静止轨道上的航天器距离太远而无法脱离轨道，在其运行寿命接近尾声时，它们被弹射出地球静止轨道，进入所谓的墓地轨道。在这里，它们实际上是被关闭的，让它们变老。超过这一点后，它们会发生什么只是猜测：预计它们会老化，考虑到恶劣的太空环境，这本身就可能导致分手。然而，我们开始预计，这些航天器可以受到太阳风的不同作用，从而导致航天器开始旋转。在短时间内，这也可能导致解体。这项建议是关于确定地球静止轨道碎片场的构成，并研究辐射场对老化卫星状态的影响。

项目成果

Precision Optical Light Curves of LEO and GEO Objects

• 发表时间: 2019
• 作者: P. Chote;J. Blake;D. Pollacco

DebrisWatch I: A survey of faint geosynchronous debris

• DOI: 10.1016/j.asr.2020.08.008
• 发表时间: 2020-08
• 期刊: Advances in Space Research
• 影响因子: 2.6
• 作者: J. Blake;P. Chote;D. Pollacco;W. Feline;G. Privett;A. Ash;S. Eves;Arthur Greenwood;N. Harwood;T. Marsh;D. Veras;C. Watson

Optical imaging of faint geosynchronous debris with the Isaac Newton Telescope

使用艾萨克·牛顿望远镜对微弱地球同步碎片进行光学成像

• 发表时间: 2019
• 期刊: Advanced Maui Optical and Space Surveillance Technologies Conference
• 作者: Blake James

Two Transiting Hot Jupiters from the WASP Survey: WASP-150b and WASP-176b

• DOI: 10.3847/1538-3881/ab88db
• 发表时间: 2020-04
• 期刊: The Astronomical Journal
• 作者: B. Cooke;D. Pollacco;Y. Almleaky;K. Barkaoui;Z. Benkhaldoun;J. Blake;F. Bouchy;P. Boumis