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Design and evaluation of a fine-resolution radar for mapping near-surface layers using plane-waves.

机译：用于使用平面波测绘近地表层的高分辨率雷达的设计和评估。

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摘要

More accurate estimates of snow accumulation fluctuations need to be established for validation of satellite measurements. To validate spaceborne altimeter measurements of mass trends, more information on the nature of spatial accumulation fluctuations is needed. Current methods using ice cores do not reveal enough information on accumulation fluctuations; they provide only mean accumulation and are prone to errors due to sparse sampling.; To aid in the interpretation of satellite data, a 12-18 GHz frequency-modulated continuous-wave radar has been developed to map near-surface layers with 3 cm vertical resolution to a depth of about 20 m. The system has been developed to be mobile and self-contained so that spatial variability of the accumulation over a large area can be characterized. The system employs the use of plane-wave illumination and wide bandwidth to discriminate layers and reject clutter from off-nadir surfaces. The fine-resolution radar has undergone testing in laboratories at the University of Kansas, as well as field experiments conducted at Summit, Greenland, in 2005. The data taken from the field experiment in Greenland have been analyzed and compared to models constructed from actual snow density profiles and stratigraphy taken directly from snow pits. Data processing algorithms have been developed and implemented which account for the system effects and conditions at time of measurement. Layer tracking software has also been developed to aid in the determination of accumulation rates for recent years.; The radar system has also been used at the WAIS Deep Divide in Antarctica during the 2005 field season, and will be used in future field experiments.
机译：需要建立更准确的积雪起伏估算，以验证卫星测量结果。为了验证质量趋势的星载高度计测量，需要更多有关空间累积波动性质的信息。当前使用冰芯的方法不能提供足够的有关堆积波动的信息。它们仅提供平均积累，并且由于稀疏采样而容易出错。为了帮助解释卫星数据，已经开发了一种12-18 GHz频率调制连续波雷达，可将垂直分辨率为3 cm的近地表层映射到约20 m的深度。该系统已开发为可移动且具有独立功能，因此可以表征大面积堆积物的空间变异性。该系统利用平面波照明和宽带宽来区分层并抑制离天底表面的杂波。高分辨率雷达已在堪萨斯大学的实验室进行了测试，并于2005年在格陵兰的Summit进行了实地实验。对格陵兰的实地实验数据进行了分析，并将其与实际积雪建立的模型进行了比较。直接从雪坑获取密度剖面和地层。已经开发和实现了数据处理算法，该算法考虑了测量时的系统影响和条件。还开发了层跟踪软件来帮助确定近年来的累积速率。该雷达系统也已在2005年野外季节的南极WAIS深层探测中使用，并将在未来的野外实验中使用。

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  • 作者

    Rink, Timothy P.;

  • 作者单位

    The University of Kansas.;

  • 授予单位 The University of Kansas.;
  • 学科 Engineering Electronics and Electrical.; Geophysics.
  • 学位 M.S.
  • 年度 2006
  • 页码 122 p.
  • 总页数 122
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;地球物理学;
  • 关键词

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