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11.
This paper describes the identification of power analysis models of BOP (the Bus Equipment Operation Analysis Program) for ETS-III operation. The ETS-III (Engineering Test Satellite III) was launched in September 1982. BOP simulations are to provide prior confirmation for safe operation in terms of electrical power and thermal control situations. It is necessary to identify power analysis model first and improve the model for higher accuracy. Studies for model identification have been done by using flight data and simulation results. As a result of these studies, the power analysis model meets well with the actual ETS-III power situation and the aimed accuracy of the model has been achieved. 相似文献
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K. Abe H. Fuke S. Haino T. Hams M. Hasegawa A. Horikoshi A. Itazaki K.C. Kim T. Kumazawa A. Kusumoto M.H. Lee Y. Makida S. Matsuda Y. Matsukawa K. Matsumoto J.W. Mitchell A.A. Moiseev J. Nishimura M. Nozaki R. Orito J.F. Ormes N. Picot-Clémente K. Sakai M. Sasaki E.S. Seo Y. Shikaze R. Shinoda R.E. Streitmatter J. Suzuki Y. Takasugi K. Takeuchi K. Tanaka N. Thakur T. Yamagami A. Yamamoto T. Yoshida K. Yoshimura 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2014
The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) is configured with a solenoidal superconducting magnet and a suite of precision particle detectors, including time-of-flight hodoscopes based on plastic scintillators, a silica-aerogel Cherenkov detector, and a high resolution tracking system with a central jet-type drift chamber. The charges of incident particles are determined from energy losses in the scintillators. Their magnetic rigidities (momentum/charge) are measured by reconstructing each particle trajectory in the magnetic field, and their velocities are obtained by using the time-of-flight system. Together, these measurements can accurately identify helium isotopes among the incoming cosmic-ray helium nuclei up to energies in the GeV per nucleon region. The BESS-Polar I instrument flew for 8.5 days over Antarctica from December 13th to December 21st, 2004. Its long-duration flight and large geometric acceptance allow the time variations of isotopic fluxes to be studied for the first time. The time variations of helium isotope fluxes are presented here for rigidities from 1.2 to 2.5 GV and results are compared to previously reported proton data and neutron monitor data. 相似文献
13.
In this paper, we investigate the possibility of the use of the Lorentz force, which acts on charged satellite when it is moving through the magnetic field, as a means of satellite attitude control. We first derive the equations of attitude motion of charged satellite and then investigate the stability of the motion. Finally we propose an attitude control method using the Lorentz force. Our method requires moderate charge level for future Lorentz-augmented satellite. 相似文献
14.
Hiroshi Yamakawa Hiroyuki Ogawa Yasumasa Kasaba Hajime Hayakawa Toshifumi Mukai Masaki Adachi 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2004,33(12):2133-2141
This paper shows the current baseline of the conceptual design of the BepiColombo/MMO (mercury magnetospheric orbiter) spacecraft, which is conducted by the ISAS Mercury Exploration Working Group. The MMO is a spinning spacecraft of 200 kg mass whose spin axis is nearly perpendicular to the Mercury orbital plane. The current status of the overall MMO system and subsystems such as thermal control, communication, power, etc. are described. The latest status of the development of critical technologies for the MMO and the outline of the international cooperation between ESA and ISAS are also presented. 相似文献
15.
ARTEMIS Science Objectives 总被引:1,自引:0,他引:1
D. G. Sibeck V. Angelopoulos D. A. Brain G. T. Delory J. P. Eastwood W. M. Farrell R. E. Grimm J. S. Halekas H. Hasegawa P. Hellinger K. K. Khurana R. J. Lillis M. ?ieroset T.-D. Phan J. Raeder C. T. Russell D. Schriver J. A. Slavin P. M. Travnicek J. M. Weygand 《Space Science Reviews》2011,165(1-4):59-91
NASA??s two spacecraft ARTEMIS mission will address both heliospheric and planetary research questions, first while in orbit about the Earth with the Moon and subsequently while in orbit about the Moon. Heliospheric topics include the structure of the Earth??s magnetotail; reconnection, particle acceleration, and turbulence in the Earth??s magnetosphere, at the bow shock, and in the solar wind; and the formation and structure of the lunar wake. Planetary topics include the lunar exosphere and its relationship to the composition of the lunar surface, the effects of electric fields on dust in the exosphere, internal structure of the Moon, and the lunar crustal magnetic field. This paper describes the expected contributions of ARTEMIS to these baseline scientific objectives. 相似文献
16.
Hiroshi Yoshida 《Space Policy》1992,8(4):325-339
The gradual commercial utilization and application of the results of government-led space development programmes is a natural development. In Japan private sector involvement goes further than this because the government budget for space development is very limited. To remain competitive in an increasingly international market Japan now needs to develop a partnership between government and private enterprise to construct a system and structure that will directly benefit the public, otherwise the necessary support for space development will not be attained. 相似文献
17.
Kobayashi Masanori Shibata Hiromi Nogami Ken’ichi Fujii Masayuki Hasegawa Sunao Hirabayashi Masatoshi Hirai Takayuki Iwai Takeo Kimura Hiroshi Miyachi Takashi Nakamura Maki Ohashi Hideo Sasaki Sho Takechi Seiji Yano Hajime Krüger Harald Lohse Ann-Kathrin Srama Ralf Strub Peter Grün Eberhard 《Space Science Reviews》2020,216(8):1-49
Space Science Reviews - In this chapter, we review the contribution of space missions to the determination of the elemental and isotopic composition of Earth, Moon and the terrestrial planets, with... 相似文献
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Hiroshi Matsui John C. Foster Donald L. Carpenter Iannis Dandouras Fabien Darrouzet Johan De Keyser Dennis L. Gallagher Jerry Goldstein Pamela A. Puhl-Quinn Claire Vallat 《Space Science Reviews》2009,145(1-2):107-135
The electric field and magnetic field are basic quantities in the plasmasphere measured since the 1960s. In this review, we first recall conventional wisdom and remaining problems from ground-based whistler measurements. Then we show scientific results from Cluster and Image, which are specifically made possible by newly introduced features on these spacecraft, as follows. 1. In situ electric field measurements using artificial electron beams are successfully used to identify electric fields originating from various sources. 2. Global electric fields are derived from sequences of plasmaspheric images, revealing how the inner magnetospheric electric field responds to the southward interplanetary magnetic fields and storms/substorms. 3. Understanding of sub-auroral polarization stream (SAPS) or sub-auroral ion drifts (SAID) are advanced through analysis of a combination of magnetospheric and ionospheric measurements from Cluster, Image, and DMSP. 4. Data from multiple spacecraft have been used to estimate magnetic gradients for the first time. 相似文献
20.
Viviane Pierrard Jerry Goldstein Nicolas André Vania K. Jordanova Galina A. Kotova Joseph F. Lemaire Mike W. Liemohn Hiroshi Matsui 《Space Science Reviews》2009,145(1-2):193-229
We describe recent progress in physics-based models of the plasmasphere using the fluid and the kinetic approaches. Global modeling of the dynamics and influence of the plasmasphere is presented. Results from global plasmasphere simulations are used to understand and quantify (i) the electric potential pattern and evolution during geomagnetic storms, and (ii) the influence of the plasmasphere on the excitation of electromagnetic ion cyclotron (EMIC) waves and precipitation of energetic ions in the inner magnetosphere. The interactions of the plasmasphere with the ionosphere and the other regions of the magnetosphere are pointed out. We show the results of simulations for the formation of the plasmapause and discuss the influence of plasmaspheric wind and of ultra low frequency (ULF) waves for transport of plasmaspheric material. Theoretical models used to describe the electric field and plasma distribution in the plasmasphere are presented. Model predictions are compared to recent Cluster and Image observations, but also to results of earlier models and satellite observations. 相似文献