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Near-Ultraviolet Spectroscopy of the Stardust Sample Return Capsule Reentry

机译:星尘样品返回胶囊进入的近紫外光谱。

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The 320–460 nmwavelength emission of the Stardust SampleReturnCapsule’s reentry inEarth’s atmospherewasnobserved remotely with an intensified slitless spectrograph, which recorded spectra at a video rate ofn29:97 frames=s. The spectral response remained constant during the full range of recovery, with only motionnblurring from imperfect guiding contributing to small variations in detection response. The data are well suited fornevaluating the temporal variation of the intensity of the various light-emitting components.Aline of zinc identifies thenperiod when a layer of ZnO pigment containing thermal protection paint was ablated. Cau0001 emission was morenintense during (and just following) the ablation of this zinc, but present throughout flight. Shock emission fromnnitrogen is no longer detected shortly after peak heating. The data are dominated by strongmolecular band emissionnfrom the radical CN. The CN band intensity is thought to be proportional to the carbon ablation rate from the heatnshield. Corrected for distance, the CN band intensity peaked early in flight, before peak heating, followed by annexponential decrease through peak heating.
机译:使用增强型无缝光谱仪远程观察了星尘样品返回舱进入地球大气的320-460 nm波长发射,该光谱仪以n29:97帧= s的视频速率记录了光谱。光谱响应在整个恢复范围内保持恒定,只有不完善的引导引起的运动模糊会导致检测响应的微小变化。这些数据非常适合评估各种发光组件的强度随时间的变化。当消融了一层含ZnO颜料的热防护涂料时,锌的含量就可以确定。在烧蚀锌的过程中(以及之后),Cau0001的发射更为强烈,但在整个过程中都存在。峰值加热后不久,不再检测到氮的冲击波发射。数据主要来自自由基CN的强分子带发射。 CN带强度被认为与来自隔热罩的碳烧蚀速率成比例。校正距离后,CN谱带强度在飞行前的峰值处达到峰值,然后才达到峰值加热,然后通过峰值加热而伴随性下降。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2010年第5期|p.753-756|共4页
  • 作者单位

    Richard L. Rairden∗Lockheed Martin Advanced Technology Center, Palo Alto, California 94304andPeter Jenniskens†SETI Institute, Mountain View, California 94043;

  • 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
  • 中图分类
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