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Spectral Measurements of Geosynchronous Satellites During Glint Season

机译：闪光季节地球同步卫星的频谱测量

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摘要

Operational communication geosynchronous satellites are typically large structures with solar panels that maintain a stable attitude relative to the Earth and Sun. During the equinox periods, the geometry of the satellite, the sun, and an Earth observer is favorable for a condition to occur called a glint, or a specular reflection off the satellite. It is presumed that the glint is caused by the solar panels because those structures are solar oriented. This phenomenon was previously observed and reported using broadband photometry techniques. In this paper, glint observations from two satellites are presented, Wildblue-1 and DirecTV-12, as measured across the visible spectrum using slitless spectroscopy techniques. It is clear from the results that the wavelength where the glint maximum occurs is shifted toward the blue or shorter wavelength end of the spectrum relative to the time periods before and after the glint. It is also clear from the data that the spectral reflectance during the glint is less like a blackbody compared to spectra before and after the glint. This is consistent with the presumption that the solar panels are the main cause of the satellite glint. These results indicate spectral measurements may offer the ability to discern satellite features such as solar panel orientation and relative or potentially absolute power capacity.
机译：业务通信地球同步卫星通常是带有太阳能电池板的大型结构，其相对于地球和太阳保持稳定的姿态。在春分期间，卫星，太阳和地球观测器的几何形状有利于发生称为闪烁或镜面反射的情况。据推测，闪烁是由太阳能电池板引起的，因为这些结构是面向太阳能的。以前使用宽带测光技术已经观察到并报告了这种现象。本文介绍了使用无缝光谱技术在可见光谱范围内对两颗卫星（Wildblue-1和DirecTV-12）进行的闪烁观测。从结果清楚可见，相对于闪烁之前和之后的时间段，发生最大闪烁的波长朝着光谱的蓝色或更短的波长端移动。从数据还可以清楚地看出，与闪烁前后的光谱相比，闪烁期间的光谱反射率不像黑体。这与太阳能电池板是卫星闪烁的主要原因的假设相一致。这些结果表明，频谱测量可能提供辨别卫星特征（例如太阳能电池板方向和相对或潜在绝对功率容量）的能力。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2017年第2期|349-355|共7页
  • 作者

    Dunsmore Anita N.; Key Joshua A.; Tucker Ryan M.; Weld Evan M.; Chun Francis K.; Tippets Roger D.;

  • 作者单位

    US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA;

    US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA;

    US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA;

    US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA;

    US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA;

    US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA;

  • 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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