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Photon Pressure Force on Space Debris TOPEX/Poseidon Measured by Satellite Laser Ranging

机译：卫星激光测距法测量空间碎片TOPEX / Poseidon上的光子压力

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The (TOPography EXperiment) TOPEX/Poseidon (T/P) altimetry mission operated for 13 years before the satellite was decommissioned in January 2006, becoming a large space debris object at an altitude of 1,340????km. Since the end of the mission, the interaction of T/P with the space environment has driven the satellite's spin dynamics. Satellite laser ranging (SLR) measurements collected from June 2014 to October 2016 allow for the satellite spin axis orientation to be determined with an accuracy of 1.7???°. The spin axis coincides with the platform yaw axis (formerly pointing in the nadir direction) about which the body rotates in a counterclockwise direction. The combined photometric and SLR data collected over the 11????year time span indicates that T/P has continuously gained rotational energy at an average rate of 2.87????J/d and spins with a period of 10.73????s as of 19 October 2016. The satellite attitude model shows a variation of the cross?￠????sectional area in the Sun direction between 8.2????m 2 and 34????m 2 . The direct solar radiation pressure is the main factor responsible for the spin?￠????up of the body, and the exerted photon force varies from 65????????N to 228????????N around the mean value of 138.6????????N. Including realistic surface force modeling in orbit propagation algorithms will improve the prediction accuracy, giving better conjunction warnings for scenarios like the recent close approach reported by the ILRS Space Debris Study Group?￠????an approximate 400 m flyby between T/P and Jason?￠????2 on 20 June 2017.
机译：（地形试验）TOPEX /波塞冬（T / P）测高任务在卫星于2006年1月退役之前已经运行了13年，成为海拔1340千米的大型空间碎片物体。自任务结束以来，T / P与太空环境的相互作用驱动了卫星的自旋动力学。从2014年6月至2016年10月收集的卫星激光测距（SLR）测量值可以确定卫星自旋轴方向，精度为1.7°。自旋轴与平台偏航轴（以前指向天底方向）重合，身体沿逆时针方向绕该平台偏航轴旋转。在11年的时间跨度内收集的光度和SLR数据的组合表明，T / P连续以平均2.87°J / d的速率获得旋转能量，自旋周期为10.73°。截至2016年10月19日的？s。卫星姿态模型显示出太阳方向的横截面面积在8.2 m 2和34 m 2之间变化。太阳的直接辐射压力是引起人体向上旋转的主要因素，所施加的光子力从65°N变为228°N。 ΔN在平均值138.6附近。在轨道传播算法中包括现实的表面力建模将提高预测精度，为诸如ILRS空间碎片研究组报告的近距离进近等方案提供更好的联合警告，即T / P与P / P之间大约有400 m的飞越。杰森（Jason）？2017年6月20日。

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