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    基于嫦娥二号卫星微波辐射计亮温数据反演月壤介电常数

    连懿 陈圣波 孟治国 张锋 张莹

    连懿, 陈圣波, 孟治国, 张锋, 张莹, 2014. 基于嫦娥二号卫星微波辐射计亮温数据反演月壤介电常数. 地球科学, 39(11): 1644-1650. doi: 10.3799/dqkx.2014.158
    引用本文: 连懿, 陈圣波, 孟治国, 张锋, 张莹, 2014. 基于嫦娥二号卫星微波辐射计亮温数据反演月壤介电常数. 地球科学, 39(11): 1644-1650. doi: 10.3799/dqkx.2014.158
    Lian Yi, Chen Shengbo, Meng Zhiguo, Zhang Feng, Zhang Ying, 2014. Dielectric Constant of Lunar Soil Derived from Chang'E-2 Passive Microwave Radiometer Measurements. Earth Science, 39(11): 1644-1650. doi: 10.3799/dqkx.2014.158
    Citation: Lian Yi, Chen Shengbo, Meng Zhiguo, Zhang Feng, Zhang Ying, 2014. Dielectric Constant of Lunar Soil Derived from Chang'E-2 Passive Microwave Radiometer Measurements. Earth Science, 39(11): 1644-1650. doi: 10.3799/dqkx.2014.158

    基于嫦娥二号卫星微波辐射计亮温数据反演月壤介电常数

    doi: 10.3799/dqkx.2014.158
    基金项目: 

    国家自然科学基金项目 41372337

    详细信息
      作者简介:

      连懿(1986-), 男, 博士研究生, 主要从事月球微波遥感研究.E-mail: fishlice@163.com

    • 中图分类号: P407

    Dielectric Constant of Lunar Soil Derived from Chang'E-2 Passive Microwave Radiometer Measurements

    • 摘要: 月壤介电常数是当前月球微波遥感探测的基础, 是月壤厚度、成分等信息提取不可或缺的参数.为了实现全月介电常数反演, 通过对嫦娥二号卫星微波辐射计亮温数据进行时角校正, 得到同一时角的全月微波亮温图.全月微波亮温表现出随月球地形、月壤成分及纬度变化的特征.基于校正后的微波辐射亮温, 结合辐射传输模型, 通过解算相关参数, 反演得到3GHz频率下全月介电常数分布.其中, 月海地区的介电常数实部高于月陆地区, 且月球极地区域介电常数实部偏低; 而介电常数虚部则在月海区域和艾肯盆地较高.通过模拟月表介电常数实验对反演结果进行温度校正, 得到22℃下全月介电常数.将反演结果和月壤真实样品的介电常数测量值进行比较评价.结果表明介电常数实部相对误差都低于11%;虚部相对误差偏大, 但其差值最大仅为0.02.因此, 基于嫦娥二号卫星微波辐射计亮温数据反演月表介电常数的方法是可行的.

       

    • 图  1  正午时刻3GHz全月亮温

      Fig.  1.  Lunar bright temperature image at Midday at 3GHz

      图  2  月壤中辐射传输机理

      Fig.  2.  Radiative transfer model of passive microwave in lunar regolith

      图  3  反演3GHz全月介电常数实部

      Fig.  3.  Inversion of real part of dielectric constant of the lunar for 3GHz channel

      图  4  反演3GHz下全月介电常数虚部

      Fig.  4.  Inversion of imaginary part of dielectric constant of the lunar for 3GHz channel

      图  5  3GHz介电常数实部随温度变化

      Fig.  5.  Real part of dielectric constant versus temperature for 3GHz channel

      图  6  22℃下月球表面介电常数实部

      Fig.  6.  Real part of dielectric constant of the lunar for 3GHz channel at 22℃

      图  7  22℃下月球表面介电常数虚部

      Fig.  7.  Imaginary part of dielectric constant of the lunar for 3GHz channel at 22℃

      表  1  MRM反演结果与月壤真实样品测量结果比较

      Table  1.   Comparison between the experimental results from real lunar soil and MRM inversion results

      月壤真实样品 MRM反演结果 相对误差(%) 差值(%)
      ε′ ε″ ε′ ε″ ε′ ε″
      Apollo 11 2.530 0.0428 2.47 0.0560 2.55 -30.84
      Apollo 12 2.280 0.0315 2.45 0.0336 -7.38 -6.80
      Apollo 14 2.620 0.0220 2.40 0.0347 8.22 -57.73
      Apollo 15 2.375 0.0196 2.48 0.0185 -4.30 5.61
      Apollo 16 2.440 0.0076 2.18 0.0137 10.65 -80.26
      Apollo 17 2.810 0.0158 2.94 0.0231 -4.62 -46.20
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    出版历程
    • 收稿日期:  2014-03-21
    • 刊出日期:  2014-11-01

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