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On the BepiColombo and juno radio science experiments: Precise models and critical estimates

机译：关于BepiColombo和juno无线电科学实验：精确模型和关键估计

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摘要

Radio Science Experiments (RSEs) use radio links between spacecraft and Earth to look for changes in the frequency as well as roundtrip light time of signals to investigate geophysical phenomena and for tests of fundamental physics. BepiColombo and Juno are two space missions that will perform RSEs, thanks to a very accurate tracking: to extract the desired information, it is not sufficient to improve the precision of observations, we need also to develop accurate mathematical models making smaller the residuals, defined as the observed observables minus the computed observables. However, sometimes, even highly accurate mathematical models are not sufficient for the determination of a given parameter with the required accuracy. In this paper, after a brief summary of the mathematical models needed for top accuracy RSEs, we will present two critical cases from the simulations of the BepiColombo and Juno where also these accurate models may not be sufficient to determine some quantities with the desired accuracy.
机译：无线电科学实验（RSE）使用航天器和地球之间的无线电链路来寻找信号的频率变化以及往返光时间，以研究地球物理现象并进行基本物理测试。 BepiColombo和Juno是执行RSE的两个太空任务，这要归功于非常精确的跟踪：要提取所需的信息，不足以提高观测精度，我们还需要开发精确的数学模型，以使残差变小，定义就是观察到的可观测值减去计算得到的可观测值。但是，有时，即使是非常精确的数学模型也不足以确定具有所需精度的给定参数。在本文中，简要概述了最高精度RSE所需的数学模型之后，我们将通过BepiColombo和Juno的仿真给出两种关键情况，其中这些精确模型也可能不足以确定所需精度的某些数量。

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