Ionospheric F-region currents estimated from Macao Science Satellite-1 and Swarm satellite magnetic data  

作　　者：JuYuan Xu HongBo Yao Keke Zhang 

机构地区：[1]Macao Institute of Space Technology and Application,Macao University of Science and Technology,Taipa,Macao 999078,China

出　　处：《Earth and Planetary Physics》2025年第3期731-739,共9页地球与行星物理(英文版)

基　　金：supported by the National Natural Science Foundation of China (42250101);the Macao Foundation. The computation made use of the high-performance computing resources at the center of the MSS data processing and analysis。

摘　　要：Accurate modeling of Earth's ionospheric F-region currents is essential for refining geomagnetic field models and understanding magnetosphere-ionosphere coupling.In this study,we develop averaged models to characterize F-region currents using magnetic data from the MSS-1(Macao Science Satellite-1) and Swarm satellite missions.Our approach employs a toroidal field representation,utilizing spherical harmonics to capture spatial variations and Fourier series to represent temporal dynamics.Two models,Model-A and Model-B,derived from distinct datasets,are constructed to represent current patterns at altitudes of 450 km and 512 km,respectively.Our models successfully capture the primary spatial structures and seasonal variations of polar field-aligned currents.Additionally,they accurately reproduce the localized inter-hemispheric field-aligned currents observed in mid and low latitudes during solstices,particularly between 14:00 and 16:00 magnetic local times.These findings enhance our understanding of ionospheric F-region currents and contribute to more precise geomagnetic field modeling.

关 键 词：Macao Science Satellite-1 SWARM field-aligned currents GEOMAGNETISM ionosphere 

分 类 号：P352[天文地球—空间物理学]