Studying the Lunar Ionosphere with SELENE Radio Science Experiment

NCUIR > College of Earth Sciences > Graduate Institute of Space Science > journal & Dissertation > Item 987654321/50411

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50411

Title:	Studying the Lunar Ionosphere with SELENE Radio Science Experiment
Authors:	Imamura,T;Iwata,T;Yamamoto,Z;Mochizuki,N;Kono,Y;Matsumoto,K;Liu,QH;Noda,H;Hanada,H;Oyama,K;Nabatov,A;Futaana,Y;Saito,A;Ando,H
Contributors:	太空科學研究所
Keywords:	SOURCE 3C 273;GPS NETWORK;PHOTOELECTRON LAYER;GEOMAGNETIC TAIL;MAGNETIC-FIELDS;SOLAR-WIND;ATMOSPHERE;OCCULTATION;SURFACE;PROSPECTOR
Date:	2010
Issue Date:	2012-03-27 17:31:07 (UTC+8)
Publisher:	國立中央大學
Abstract:	Radio occultation observations of the electron density near the lunar surface were conducted during the SELENE (Kaguya) mission using the Vstar and Rstar sub-satellites. Previous radio occultation measurements conducted in the Soviet lunar missions have indicated the existence of an ionosphere with peak densities of several hundreds of electrons per cubic centimeters above the dayside lunar surface. These densities are difficult to explain theoretically when the removal of plasma by the solar wind is considered, and thus the generation mechanism of the lunar ionosphere is a major issue, with even the validity of previous observations still under debate. The most serious error source in the measurement is the fluctuation of the terrestrial ionosphere which also exists along the ray path. To cope with this difficulty, about 400 observations were conducted using Vstar to enable statistical analysis of the weak signal of the lunar ionosphere. Another method is to utilize Vstar and Rstar with the second one being used to measure the terrestrial ionosphere contribution. The observations will establish the morphology of the lunar ionosphere and will reveal its relationship with various conditions to provide possible clues to the mechanism.
Relation:	SPACE SCIENCE REVIEWS
Appears in Collections:	[Graduate Institute of Space Science] journal & Dissertation

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