MGS magnetic fields and electron reflectometer investigation: Discovery of paleomagnetic fields due to crustal remanence |
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| Institution: | 1. Departamento de Física, Universidad de Extremadura, Badajoz, Spain;2. Instituto Universitario de Investigación del Agua, Cambio Climático y Sostenibilidad (IACYS), Universidad de Extremadura, Badajoz, Spain;3. Departamento de Física Aplicada, Universidad de Granada, Granada, Spain;4. Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC), Zaragoza, Spain;5. Departamento de Física, Universidad de Girona, Girona, Spain;6. Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, Granada, Spain;1. Department of Physics, Florida A&M University, 2077 E. Paul Dirac Drive, Tallahassee, FL 32310, United States;2. Alakai Defense Systems, 197 Replacement Ave, Suite 102, Fort Leonard Wood, MO 65473, United States |
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| Abstract: | The MGS MAG/ER investigation provides vector measurements of the magnetic field and the ionospheric electron density near periapsis. The instrumentation consists of twin triaxial fluxgate magnetometers and a “top hat” electrostatic analyzer of electrons in the energy range of 1 eV to 20 keV. Results include extensive mapping of the detached bow shock wave in the solar wind, the nature and structure of the ionopause and magnetic pile-up boundaries. The most surprising result is the discovery of localized magnetic fields of planetary origin, presumably due to remanent crustal magnetization. Maximum fields measured while below the ionosphere exceed 300 nT. We present an initial study of one of these very localized fields and extrapolations to the Martian surface in the Acidalia planitia. |
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