The Capon Method for Mercury's Magnetic Field Analysis

Frontiers in Physics

Uwe Motschmann¹  Daniel Heyner²  Yasuhito Narita²  Simon Toepfer³ 

[1] DLR Institute of Planetary Research, Berlin, Germany;Institut für Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig, Braunschweig, Germany;Institut für Theoretische Physik, Technische Universität Braunschweig, Braunschweig, Germany;Space Research Institute, Austrian Academy of Sciences, Graz, Austria;

关键词: diagonal loading;    Gauss coefficients;    least–squares method;    magnetic field analysis;    Capon's method;   

DOI  :  10.3389/fphy.2020.00249

来源: DOAJ

【 摘 要 】

Characterization of Mercury's internal and external magnetic field is one of the primary goals of the magnetometer experiment on board the BepiColombo MPO (Mercury Planetary Orbiter) spacecraft. A novel data analysis tool is developed to determine the Gauss coefficients in the multipole expansion using Capon's minimum variance projection method. The construction of the estimator is presented along with a test against the numerical simulation data of Mercury's magnetosphere and a comparison with the least square fitting method shows, that Capon's estimator is in better agreement with the coefficients, implemented in the simulation, than the least square fit estimator.

【 授权许可】

Unknown