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毫米/亚毫米波探测大气温度和湿度的通道选择

郭杨 卢乃锰 谷松岩

郭杨, 卢乃锰, 谷松岩. 毫米/亚毫米波探测大气温度和湿度的通道选择. 应用气象学报, 2010, 21(6): 716-723..
引用本文: 郭杨, 卢乃锰, 谷松岩. 毫米/亚毫米波探测大气温度和湿度的通道选择. 应用气象学报, 2010, 21(6): 716-723.
Guo Yang, Lu Naimeng, Gu Songyan. Channel selection of millimeter/submillimeter wave for temperature and humidity sounding. J Appl Meteor Sci, 2010, 21(6): 716-723.
Citation: Guo Yang, Lu Naimeng, Gu Songyan. Channel selection of millimeter/submillimeter wave for temperature and humidity sounding. J Appl Meteor Sci, 2010, 21(6): 716-723.

毫米/亚毫米波探测大气温度和湿度的通道选择

资助项目: 

科技部863项目“星载毫米/亚毫米波云雨大气遥感的仿真数值模拟研究” 2007AA122115

Channel Selection of Millimeter/Submillimeter Wave for Temperature and Humidity Sounding

  • 摘要: 利用热带大气温湿廓线计算了热带地区毫米/亚毫米波段微波大气透过率权重函数。对权重函数峰值高度的分析结果显示:对流层低层的大气温度可以选择118 GHz通道的远翼频率来探测,而对高层大气温度进行探测时,选择425 GHz通道的远翼频率较为合适;在大气湿度探测方面,183 GHz通道组合适合探测对流层中层大气的湿度,高层大气湿度探测应该首先考虑380 GHz通道组合来实现。根据大气温度探测通道和大气湿度探测通道的权重函数分布,鉴于国内现有遥感仪器的制造水平,建议选择118 GHz 3个通道与425 GHz 8个通道共11个大气温度探测通道和183 GHz 3个通道与380 GHz 5个通道共8个大气湿度探测通道作为未来静止轨道微波探测的候选通道。
  • 图  1  标准大气晴空条件下1~1000GHz天底不透明度[9]

    Fig. 1  Clear-sky atmospheric opacity at nadir for up to 1000 GHz for a mean standard atmosphere[9]

    图  2  热带地区温湿廓线 (a) 温度廓线,(b) 湿度廓线

    Fig. 2  Temperature profile and water vapor profile in the tropical region (a) temperature profiling, (b) water vapor profiling

    图  3  热带地区183GHz (a) 和380GHz (b) 水汽通道权重函数分布图

    Fig. 3  Weighting functions for humidity in the bands of 183 GHz (a) and 380 GHz (b) in the tropical region

    图  4  热带地区118GHz (a) 和425GHz (b) 氧气通道权重函数分布图

    Fig. 4  Weighting functions for temperature in the bands of 118 GHz (a) and 425 GHz (b) in the tropical region

    图  5  大气湿度探测通道的辐射亮温差 (a)183GHz, (b)380GHz

    Fig. 5  Difference of brightness temperature in the humidity channels (a) 183 GHz, (b) 380 GHz

    图  6  大气温度探测通道的辐射亮温差 (a)118GHz, (b)425GHz

    Fig. 6  Difference of brightness temperature in the temperature channels (a)118 GHz, (b)425 GHz

    图  7  吸收线一组各通道不同带宽亮温差 (a)118GHz, (b)425GHz, (c)183GHz, (d)380GHz

    Fig. 7  different bandwidth range at 118 GHz (a), 425 GHz (b), 183 GHz (c), 380 GHz (d)

    表  1  大气温度和大气湿度探测的通道设置表

    Table  1  Channels selected for detecting temperature and humidity

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出版历程
  • 收稿日期:  2009-09-21
  • 修回日期:  2010-08-04
  • 刊出日期:  2010-12-31

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