Mathematics – Logic
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p12d0522s&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #P12D-0522
Mathematics
Logic
2780 Solar Wind Interactions With Unmagnetized Bodies, 5440 Magnetic Fields And Magnetism, 5470 Surface Materials And Properties, 6250 Moon (1221)
Scientific paper
SELENE(SELenological and Engineering satellite) is a Japanese lunar orbiter which will be launched in 2005. The main purpose of this satellite is to study the origin and evolution of the moon by means of global mapping of element abundances, mineralogical composition, and surface geographical mapping from 100km altitude. MAP(Magnetic field And Plasma experiment) is one of the scientific instruments onboard the SELENE satellite. MAP consists of LMAG(Lunar MAGnetometer) and PACE(Plasma energy Angle and Composition Experiment). LMAG is a triaxial flux gate magnetometer that is equipped at the top plate of a 12m long mast in order to avoid the interference magnetic fields caused by the spacecraft .LMAG measures the vector magnetic field in the frequency range below 10Hz with a resolution of 0.1nT. PACE consists of 4 sensors: ESA(Electron Spectrum Analyzer)-S1, ESA-S2, IMA(Ion Mass Analyzer) , and IEA(Ion Energy Analyzer) . ESA-S1 and S2 are two identical sensors that measure the three-dimensional distribution function of low energy electrons below 17keV around the moon. The ESA sensor basically employs a method of a top hat electrostatic analyzer with angular scanning deflectors at the entrance and toroidal electrodes inside. IMA and IEA measure the three-dimensional distribution function of low energy ions below 28keV/q around the moon. IMA has an ability to discriminate the ion mass with high mass resolution. The IMA sensor consists of the energy analyzer that is basically the same as the ESA sensor and the LEF(Linear Electric Field) TOF(Time Of Flight) ion mass analyzer. The IEA sensor consists of only the energy analyzer which is the same as that of the IMA.In order to minimize the mass and power consumption, the control electronics for the LMAG sensor and the PACE sensors are contained in one package, MAP-E. The scientific objectives of the LMAG are 1) to measure the magnetization structure of the lunar magnetic anomalies, 2) to measure the magnetic field environment caused by the moon-solar wind interaction, and 3) to estimate the electric conductivity structure of the lunar interior by measuring the induced magnetic field.The scientific objectives of the PACE are 1) to resolve the moon - solar wind interaction, 2) to resolve the moon - Earth's magnetosphere interaction, 3) to observe the Earth's magnetotail, 4) to measure the ions sputtered from the lunar surface and the lunar atmosphere, and 5) to measure the magnetic anomaly on the lunar surface using ESA and LMAG as an electron reflectometer.
Saito Yukio
Tsunakawa Hideo
Yokota Satoshi
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