| 危险目标再入跟踪预报研究 |
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| 引用本文： | 吴连大,王昌彬.危险目标再入跟踪预报研究[J].紫金山天文台台刊,2000,19(2):100-105. |
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| 作者姓名： | 吴连大 王昌彬 |
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| 作者单位： | 中国科学院紫金山天文台,南京 |
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| 摘 要： | 本文讨论了危险目标再入的有关问题，通过２２８７０和２５１００两个卫星陨落期预报的实践，我们形成了一种计算卫星落点的方法，方法的基本要点是：１算准卫星的面质比；２在１８０公里以下，考虑阻尼系数随高度（大气密度）的变化；３在计算落点时，使用两组根数，调整面质比使两组根数计算的落点基本相同，并验证面质比调整的合理性；４对于ＭＳＩＳ－１９９０模式，我们发现调整后的面质比要比理论的面质比大１．０９倍，也许这
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| 关 键 词： | 危险目标 陨落 预报 再入 跟踪 轨道 卫星 |
RESEARCH ON TRUCKING AND PREDICTION OF RISK OBJECT RE-ENTRY |
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| Authors: | Wu Lian da Wang Chang bin |
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| Abstract: | In this paper, some problems, related to risk object re entry, are discussed. Through the practice of the re entry prediction for satellite 22870 and 25100, we worked out a method to calculate the decaying point of satellite. The main points of the method are:(1) to compute the area mass ratio accurately.(2) For the satellite altitude below 180km, the change of drag coefficient Cd with altitude must be considered. (3) While calculating the decaying point of satellite, we selected two different sets of orbit elements, then adjusted the area mass ratio, so that with the adjusted area mass ratio, could get the same decaying point from two sets of orbit elements, the reasonability of the adjusted area mass ratio should be judged also. (4) For Model MSIS 90, we found that the value of adjusted area mass ratio was 1.09 times that of it's theoretical one, we thought that at the altitude about 120km, the value of density given by MSIS 90 might be less than that of real density. |
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| Keywords: | risk object re enury prediction |
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