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首页> 外文期刊>Journal of Spacecraft and Rockets >Observations of the Spin-Period Variations of Inactive Box-Wing Geosynchronous Satellites
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Observations of the Spin-Period Variations of Inactive Box-Wing Geosynchronous Satellites

机译：不活跃的箱翼地球同步卫星自旋周期变化的观测

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摘要

Ground-based broadband photometric observations of four inactive geosynchronous satellites of box-wing design were frequently performed between March2012 and December2013 to commence a long-term study of their attitude dynamics. The brightness of the satellites was observed to vary in a periodic fashion, which was interpreted to mean that reflected sunlight was being modulated due to satellite spin. The average observed spin periods inferred from the light curves ranged from 158 to 1548s. The variation of each satellite's inferred spin period was observed to be small or negligible over hourly timescales but varied significantly (from 15 to 25% of the average) and smoothly (possibly cyclically) over monthly to yearly timescales. The characteristics of the observed spin-period variations, including the amplitudes, timescales, and shapes, differed greatly between satellites and suggest a relationship between the average observed spin period and the variation amplitude. The observed spin-period variations were interpreted as being due to one or more external disturbance torques acting on the spacecraft. The most significant torque was found to be solar radiation pressure acting on the large-area solar panels. The magnitude of this torque produced sufficient angular accelerations to explain the observed spin-period variations. A first-order phenomenological model is proposed to explain the high-level aspects of the observed phenomena.
机译：2012年3月至2013年12月之间，频繁进行了对四只非活动箱形设计地球同步卫星的地面宽带光度观测，以开始对其姿态动力学的长期研究。观察到卫星的亮度以周期性的方式变化，这被解释为意味着反射光由于卫星自旋而被调制。根据光曲线推断出的平均自旋周期范围为158至1548s。观察到每个卫星推断的自旋周期的变化在小时时间尺度上很小或可以忽略，但是在月度到年度时间尺度上却有很大的变化（从平均值的15％到25％），并且平滑地变化（可能是周期性的）。卫星之间观测到的自旋周期变化的特征（包括幅度，时标和形状）差异很大，这表明平均观测到的自旋周期与变化幅度之间存在关系。观测到的自旋周期变化被解释为是由于作用在航天器上的一个或多个外部干扰转矩引起的。发现最大的扭矩是作用在大面积太阳能板上的太阳辐射压力。该扭矩的大小产生了足够的角加速度，以解释观察到的自旋周期变化。提出了一阶现象学模型来解释观测现象的高级方面。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2015年第3期|968-977|共10页
  • 作者

    Earl Michael A.; Wade Gregg A.;

  • 作者单位

    Royal Mil Coll Canada, Dept Phys, Kingston, ON K7K 7B4, Canada;

    Royal Mil Coll Canada, Dept Phys, Kingston, ON K7K 7B4, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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