| 低轨航天器长期轨道预报的初步研究 |
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| 引用本文： | 汤靖师,刘 林. 低轨航天器长期轨道预报的初步研究[J]. 飞行器测控学报, 2014, 0(1): 59-64 |
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| 作者姓名： | 汤靖师 刘 林 |
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| 作者单位： | [1]南京大学天文与空间科学学院,南京210093 [2]南京大学空间环境与航天动力学研究所,南京210093 [3]航天飞行动力学技术重点实验室,北京100094 |
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| 基金项目： | 国家自然科学基金（No.11033009,No.11203015） |
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| 摘 要： | 低轨航天器的长期管理和维护需要较高精度的长期轨道预报,影响长期预报精度最主要的因素来自低轨航天器所受的大气阻力摄动.借助平均大气密度模型,以340 km高度的低轨航天器为例,研究了低轨长期轨道预报问题.利用基于长弧段的逐天精密定轨,可以修正参考点的平均密度.根据目前积累的数据,通过引入太阳自转周期27 d和半年180 d这2个周期拟合平均密度序列,未来的平均密度可以预报到较高精度.目前的计算结果表明,在此基础上低轨航天器的长期轨道预报精度可以得到保证,在不同算例中表现基本稳定可靠.
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| 关 键 词： | 低轨航天器 长期轨道预报 平均密度模型 模型补偿 |
On Long-Term Orbit Prediction for Low Earth Orbit Spacecraft |
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| TANG Jingshi,LIU Lin. On Long-Term Orbit Prediction for Low Earth Orbit Spacecraft[J]. Journal of Spacecraft TT&C Technology, 2014, 0(1): 59-64 |
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| Authors: | TANG Jingshi LIU Lin |
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| Affiliation: | 1.School of Astronomy and Space Science, Nanjing University, Nanjing 210093;2.Institute of Space Environment and Astrodynamics, Nanjing University, Nanjing 210093;3.Science and Technology on Aerospace Flight Dynamics Laboratory, Beijing 100094) |
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| Abstract: | Long-term operation and maintenance of low earth orbit spacecraft generally requires long-term predicted orbit with sufficiently high accuracy.However,this is seriously limited by the high uncertainty in atmosphere drag.A low earth orbit spacecraft with an altitude of 340 km is taken as an example in this paper and its long-term orbit is predicted based on studies with mean atmosphere density model.With 24-hour POD （Precise Orbit Determination） and sufficiently long historical data,the mean density at the reference altitude is corrected on daily basis.With currently available data,it is shown that with the solar rotation period of 27 days and the semi-annual period of 180 days,the density series can be well fitted and predicted.Preliminary research with two tests indicates that the orbits predicted with this approach are reasonably accurate and stable. |
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| Keywords: | low earth orbit spacecraft long-term orbit forecast mean atmosphere density model model correction |
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