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首页> 外文期刊>Advances in space research >Lunar laser topography by LALT on board the KAGUYA lunar explorer - Operational history, new topographic data, peak height analysis of laser echo pulses
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Lunar laser topography by LALT on board the KAGUYA lunar explorer - Operational history, new topographic data, peak height analysis of laser echo pulses

机译：LALT在KAGUYA月球探测器上的月球激光地形图-运行历史，新的地形数据，激光回波脉冲的峰高分析

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摘要

In this paper we review the lunar laser ranging conducted by the laser altimeter (LALT) on board the KAGUYA lunar explorer (2007-2009). Five aspects of LALT measurements are described: (1) General operational history, (2) Laser shot and data statistics, (3) Revisions to LALT topographic data, (4) Variations in laser output energy, and (5) Peak height analysis of laser echo pulses. LALT was able to range to the lunar surface despite some troubles with respect to laser output energy in the middle of the KAGUYA mission. The time series topographic data set was revised (Ver. 2) by incorporating new lunar gravity model based on KAGUYA and other historical lunar satellite's orbit data, along with other improvements, for example by incorporating the accurate position of the laser col-limator on board the KAGUYA; however, more than half of the acquired range data could not be converted properly due to problems with orbit accuracy during the extended phase of the mission. The spherical harmonic coefficients and the basic lunar figure parameters derived from LALT_LGT_TS agree very well with LRO-LOLA and the Chang'E-1 LAM model. It is possible that partial failure to the laser diode was responsible for the gradual degradation of laser power (0.835 mJ per million shots) and the rapid decrease that occurred over April 9-14, 2008. The laser power also proved to be extremely sensitive to the temperature of the laser oscillator. The peak height ratio - that is peak height telemetry data divided by calculated ratio - is about 19% on average using the mean slope and albedo data from LALT and Spectral Profiler on KAGUYA space craft, respectively, which suggests the performance of peak height measurement is more than 1/5 for more than 70 km altitude, if compared with calculated one. The peak height ratio may be better if we take the effect of small scale topography within a footprint into account.
机译：在本文中，我们回顾了由KAGUYA月球探测器（2007-2009年）上的激光高度计（LALT）进行的月球激光测距。描述了LALT测量的五个方面：（1）一般运行历史，（2）激光发射和数据统计，（3）对LALT地形数据的修订，（4）激光输出能量的变化，以及（5）峰高分析激光回波脉冲。尽管在KAGUYA任务执行过程中在激光输出能量方面遇到了一些麻烦，但LALT仍能够到达月球表面。通过合并基于KAGUYA的新月球重力模型和其他历史月球卫星的轨道数据以及其他改进，例如通过合并激光准直仪在船上的准确位置，对时间序列地形数据集进行了修订（第2版） KAGUYA；但是，由于在任务的扩展阶段轨道精度存在问题，一半以上的获取的距离数据无法正确转换。从LALT_LGT_TS导出的球谐系数和基本月球图形参数与LRO-LOLA和Chang'E-1 LAM模型非常吻合。激光二极管的部分故障可能是导致激光功率逐渐降低（每百万发子弹0.835 mJ）和2008年4月9日至14日迅速下降的原因。激光功率还被证明对以下情况极为敏感：激光振荡器的温度。分别使用KAGUYA航天器上的LALT和Spectral Profiler的平均斜率和反照率数据，峰高比（即峰高遥测数据除以计算得到的比）平均平均约为19％，这表明峰高测量的性能为如果与计算得出的高度相比，则在超过70 km的高度时大于1/5。如果我们考虑足迹内的小规模地形影响，则峰高比可能会更好。

著录项

  • 来源
    《Advances in space research》 |2013年第2期|262-271|共10页
  • 作者

    Hiroshi Araki; Hirotomo Noda; Seiichi Tazawa; Yoshiaki Ishihara; Sander Goossens; Sho Sasaki;

  • 作者单位

    National Astronomical Observatory of Japan, 2-21-1 Mitaka. Tokyo 181-8588, Japan;

    National Astronomical Observatory of Japan, 2-12 Mizusawa, Ohshu, Iwate 023-0861, Japan;

    National Astronomical Observatory of Japan, Hilo, HI 96720, USA;

    National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan;

    CRESST/Planetary Geodynamics Laboratory, NASA Goddard Space Flight Center. Greenbelt, MD 20771. USA;

    National Astronomical Observatory of Japan, 2-12 Mizusawa, Ohshu, Iwate 023-0861, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    KAGUYA; LALT; Laser; Lunar topography; Operational history; Peak height;

    机译：KAGUYA;拉特激光;月球地形;运营历史;峰高;

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