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A Technique for the Analysis of Radio Occultation Data to Retrieve Atmospheric Properties and Associated Uncertainties
Radio Science ( IF 1.6 ) Pub Date : 2021-04-12 , DOI: 10.1029/2020rs007205 Flavio Petricca 1 , Gael Cascioli 1 , Antonio Genova 1
Radio Science ( IF 1.6 ) Pub Date : 2021-04-12 , DOI: 10.1029/2020rs007205 Flavio Petricca 1 , Gael Cascioli 1 , Antonio Genova 1
Affiliation
Among the techniques for atmospheric sounding, radio occultation enables an in depth investigation of vertical profiles from the ionosphere to the troposphere by measuring the radio frequency signal associated to the propagation medium. A precise characterization of the atmospheric layers requires a thorough processing of the raw radio tracking data to estimate the thermodynamic properties of the atmosphere and their related uncertainties. In this work, we present a method to retrieve refractivity, density, pressure, and temperature profiles with the associated uncertainties by analyzing a set of raw radio tracking data occulted by the atmosphere. This technique is also well suited to process two-way Doppler measurements that are not acquired during dedicated occultation campaigns. The NASA mission Mars Reconnaissance Orbiter (MRO) provided a significant amount of radio occultation data that were not planned for atmospheric sounding, but were caused by the spacecraft orbit geometry. Our analysis of one of these occultation profiles with the proposed method allows indicating that MRO occultation datasets provide crucial information regarding Mars’ troposphere that can be used as input of general circulation models.
中文翻译:
分析无线电掩星数据以检索大气性质和相关不确定性的技术
在大气探测技术中,无线电掩埋能够通过测量与传播介质相关的射频信号来深入研究从电离层到对流层的垂直剖面。大气层的精确表征需要对原始无线电跟踪数据进行彻底处理,以估计大气层的热力学性质及其相关的不确定性。在这项工作中,我们提出了一种通过分析大气层掩盖的原始无线电跟踪数据来检索具有相关不确定性的折射率,密度,压力和温度曲线的方法。该技术也非常适合处理在专门的掩星战役期间未采集的双向多普勒测量。NASA的火星侦察轨道飞行器(MRO)提供了大量的无线电掩星数据,这些数据不是为大气探测计划的,而是由航天器的轨道几何形状引起的。我们使用提出的方法对其中一种掩星剖面的分析表明,MRO掩星数据集提供了有关火星对流层的关键信息,可用作一般环流模型的输入。
更新日期:2021-05-26
中文翻译:
分析无线电掩星数据以检索大气性质和相关不确定性的技术
在大气探测技术中,无线电掩埋能够通过测量与传播介质相关的射频信号来深入研究从电离层到对流层的垂直剖面。大气层的精确表征需要对原始无线电跟踪数据进行彻底处理,以估计大气层的热力学性质及其相关的不确定性。在这项工作中,我们提出了一种通过分析大气层掩盖的原始无线电跟踪数据来检索具有相关不确定性的折射率,密度,压力和温度曲线的方法。该技术也非常适合处理在专门的掩星战役期间未采集的双向多普勒测量。NASA的火星侦察轨道飞行器(MRO)提供了大量的无线电掩星数据,这些数据不是为大气探测计划的,而是由航天器的轨道几何形状引起的。我们使用提出的方法对其中一种掩星剖面的分析表明,MRO掩星数据集提供了有关火星对流层的关键信息,可用作一般环流模型的输入。