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Characterization of multi-scale ionospheric irregularities using ground-based and space-based GNSS observations

Satellite Navigation 2021年第1期2卷 192-212页

作者： YuXiang Peng Wayne A Scales Michael D Hartinger Zhonghua Xu shane coyle Center for Space Science and Engineering Research Virginia TechBlacksburgVA 24061USA Bradley Department of Electrical and Computer Engineering Virginia TechBlacksburgVA 24061USA Space Science Institute BoulderCO 80301USA National Institute of Aerospace HamptonVA 23666USA Center for Space Science and Engineering Research Virginia TechBlacksburgVA 24061USA.

Ionospheric irregularities can adversely affect the performance of Global Navigation Satellite System (GNSS). How-ever, this opens the possibility of using GNSS as an effective ionospheric remote sensing tool. Despite ionospheric monitoring has been undertaken for decades, these irregularities in multiple spatial and temporal scales are still not fully understood. This paper reviews Virginia Tech’s recent studies on multi-scale ionospheric irregularities using ground-based and space-based GNSS observations. First, the relevant background of ionospheric irregularities and their impact on GNSS signals is reviewed. Next, three topics of ground-based observations of ionospheric irregulari-ties for which GNSS and other ground-based techniques are used simultaneously are reviewed. Both passive and active measurements in high-latitude regions are covered. Modelling and observations in mid-latitude regions are considered as well. Emphasis is placed on the increased capability of assessing the multi-scale nature of ionospheric irregularities using other traditional techniques (e.g., radar, magnetometer, high frequency receivers) as well as GNSS observations (e.g., Total-Electron-Content or TEC, scintillation). Besides ground-based observations, recent advances in GNSS space-based ionospheric measurements are briefly reviewed. Finally, a new space-based ionospheric observa-tion technique using GNSS-based spacecraft formation flying and a differential TEC method is demonstrated using the newly developed Virginia Tech Formation Flying Testbed (VTFFTB). Based on multi-constellation multi-band GNSS, the VTFFTB has been developed into a hardware-in-the-loop simulation testbed with external high-fidelity global ionospheric model(s) for 3-satellite formation flying, which can potentially be used for new multi-scale ionospheric measurement mission design.

关键词： GNSS Ionospheric irregularities Remote sensing Active experiment Spacecraft formation flying

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Newly established autonomous adaptive low-power instrument platform(AAL-PIP) chain on East Antarctic Plateau and operation

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Advances in Polar Science 2019年第4期30卷 362-374页

作者： Zhonghua XU Michael DHARTINGER Robert CLAUER Daniel WEIMER Kshitija DESHPANDE Hyomin KIM Stephen MUSKO Anna WILLER Thomas EDWARDS shane coyle Yuxiang PENG Dong LIN John BOWMAN Bradley Department of Electrical and Computer Engineering Virginia TechBlacksburgVA 24061USA Center for Space Plasma Physics Space Science InstituteBoulderCO 80301USA Department of Physical Sciences Embry-Riddle Aeronautical UniversityDaytona BeachFL 32114USA Center for Solar-Terrestrial Research New Jersey Institute of TechnologyNewarkNJ 07102USA Space Physics Research Laboratory College of EngineeringUniversity of MichiganAnn ArborMI48109USA DTU Space National Space InstituteTechnical University of DenmarkKongens LyngbyDenmark

An autonomous adaptive low-power instrument platform(AAL-PIP)chain of six stations has been newly established on East Antarctic Plateau along the 40°geomagnetic meridian,to investigate interhemispheric geomagnetically conjugate current systems,waves,and other space weather phenomena in Polar *** six stations,PG0 to PG5,which host low-power magnetometers(Fluxgate and Searchcoil),dual frequency GPS receivers,HF radio experiment,and run autonomously with solar power and two-way satellite communication,are designated at the geomagnetically conjugate(based on the International Geomagnetic Reference Field)locations of the West Greenland geomagnetic chain covering magnetic latitudes from 70°to 80°.We present the development,deployment,and operation of this chain,as well as the data collected by the chain and some preliminary scientific results showing evidence of interhemispheric asymmetries,which are important to better understand Solar Wind–Magnetosphere–Ionosphere(SWMI)coupling in Polar *** investigations focus on magnetic impulse(MI)events,traveling convection vortices(TCVs),and ultra-low frequency(ULF)waves in the coupled southern and northern hemispheres.

关键词： magnetometers magnetic perturbation magnetic conjugate

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