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首页> 外文期刊>International journal of remote sensing >Application of the information approach to the analysis of two-year microwave observations of the atmosphere by the RPG-HATPRO radiometer at St. Petersburg University
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Application of the information approach to the analysis of two-year microwave observations of the atmosphere by the RPG-HATPRO radiometer at St. Petersburg University

机译：信息方法在圣彼得堡大学RPG-HATPRO辐射计对两年微波微波观测的分析中的应用

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摘要

Since June 2012 the ground-based microwave (MW) radiometer RPG-HATPRO (Radiometer Physics GmbH - Humidity and Temperature Profiler) G3 (generation 3) has been operating at the Faculty of Physics of St. Petersburg State University in constant mode with sampling interval of 1-2s. The results of MW radiation brightness temperature measurements in 14 spectral channels of the RPG-HATPRO radiometer have been analysed for the time period December 2012 to November 2014. Within this time period, different data ensembles are compiled that have different duration and describe the variety of atmospheric situations at the observational site. Two different approaches are used for the assessment of the information characteristics of MW measurements. The first one is based on calculation of Shannon's information content that characterizes the number of atmospheric states distinguishable by measurements. We use the modification proposed by Kozlov - the information volume' approach. The second approach is based on calculation of the information quantity that characterizes the degree of correlation between measurements and atmospheric state parameter variations. The information quantities are calculated and analysed for the complete set of spectral channels and for two subsets that comprised seven so-called temperature' and seven so-called humidity' channels separately. Kozlov's information volume' approach is also applied to the problem of estimation of the optimal sampling interval of MW measurements. It is shown that for St. Petersburg University observation site that represents subarctic region with maritime climate: (1) the information volume of MW measurements for a cold and dry season is significantly less than for a warm and humid season due to lack of information from humidity channels'; (2) for stable atmospheric conditions the sampling interval of MW measurements should not be greater than 100-200s; (3) the degree of correlation between MW measurements and atmospheric temperature and humidity does not considerably depend on season of observations.
机译：自2012年6月起，地面微波（MW）辐射计RPG-HATPRO（Radiometer Physics GmbH-湿度和温度廓线仪）G3（第3代）已在圣彼得堡国立大学物理学院以恒定模式运行，采样间隔为1-2秒。对RPG-HATPRO辐射计的14个光谱通道中的MW辐射亮度温度测量结果进行了分析，分析了2012年12月至2014年11月的时间段。在此时间段内，编制了不同的数据集，这些数据集具有不同的持续时间并描述了观测地点的大气情况。两种不同的方法用于评估兆瓦测量的信息特征。第一个基于香农信息含量的计算，该信息表征了通过测量可区分的大气状态数量。我们使用Kozlov提出的修改-信息量方法。第二种方法基于信息量的计算，该信息量表征了测量值与大气状态参数变化之间的相关程度。计算和分析整个频谱通道集合以及分别包含七个所谓的“温度”和七个“湿度”通道的两个子集的信息量。科兹洛夫的信息量方法也适用于估计兆瓦测量值的最佳采样间隔的问题。结果表明，对于代表北海地区海洋性气候的圣彼得堡大学观测点：（1）由于缺乏来自气候的信息，寒冷和干旱季节的兆瓦测量信息量明显少于温暖和潮湿季节的兆瓦测量信息量。湿度通道（2）在稳定的大气条件下，兆瓦测量的采样间隔不应大于100-200s； （3）兆瓦测量值与大气温度和湿度之间的相关程度在很大程度上不取决于观测季节。

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  • 来源
    《International journal of remote sensing》 |2016年第14期|3346-3364|共19页
  • 作者

    Kostsov V. S.; Timofeyev Yu. M.; Zaitsev N. A.; Poberovsky A. V.; Osipov S. I.;

  • 作者单位

    St Petersburg State Univ, Dept Atmospher Phys, Fac Phys, St Petersburg, Russia;

    St Petersburg State Univ, Dept Atmospher Phys, Fac Phys, St Petersburg, Russia;

    St Petersburg State Univ, Dept Atmospher Phys, Fac Phys, St Petersburg, Russia;

    St Petersburg State Univ, Dept Atmospher Phys, Fac Phys, St Petersburg, Russia;

    St Petersburg State Univ, Dept Atmospher Phys, Fac Phys, St Petersburg, Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
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