排序方式: 共有16条查询结果,搜索用时 15 毫秒
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Noriyuki Namiki Takahiro Iwata Nobuyuki Kawano Fumio Fuke Naoki Tateno Kazuyoshi Asari Hirotomo Noda Yusuke Kono Hideo Hanada Yukihiro Yahagi Zen’ichi Yamamoto Koji Tanaka Mitsuo Yamada Koji Matsumoto Sander Goossens 《Space Science Reviews》2010,154(1-4):103-121
The Japanese lunar mission Selenological and Engineering Explorer (SELENE) was launched in September 2007 and continued its mission until June 2009, when the main orbiter impacted with the surface of the Moon. SELENE consisted of three satellites: Main, Rstar, and Vstar. Rstar’s tasks were to forward up-link signals from the Usuada Deep Space Center (UDSC) to Main, and to down-link returning signals from Main to UDSC. We refer to this tracking sub-system as a four-way Doppler measurement. In contrast, conventional tracking systems between Rstar and UDSC as well as between Main and ground stations are referred to as two-way Doppler and range measurements. Using Main and Rstar, we successfully observed the gravity field over the farside of the Moon. Because four-way Doppler measurements via a relay sub-satellite were a fundamental experiment in space for Japanese space agencies, compatibility of radiometric instruments onboard Main and Rstar to UDSC were carefully examined at the UDSC using components manufactured for flight models. These tests not only proved the feasibility of the four-way Doppler measurements but also provided biases and variations of the four-way Doppler and two-way Doppler and range measurements that were later taken into account during the processing of tracking data and the analysis of the lunar global gravity field. 相似文献
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Naoki Oda 《Space Science Reviews》1983,36(3):285-292
The gamma-ray emissivity for the narrow component (FWHM = 2°) at the 0.3–5 GeV range is derived as a function of the galactocentric distance. The narrow component might result from the interaction between cosmic rays and H2 gas. The mass of gas in the Galactic Center is not large enough to produce the gamma-ray peak, but enough to produce the far-infrared peak. The relation of far-infrared dip and near-infrared hump near l = 356° to gamma-ray hump is discussed. 相似文献
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Tetsuya Yoshida Daisuke Akita Hideyuki Fuke Akira Kadokura Jiro Kawada Tomomi Kawasaki Issei Ijima Naoki Izutsu Yukihiko Matsuzaka Eiichi Mizuta Michiyoshi Namiki Naoki Nonaka Shigeo Ohta Yoshitaka Saito Motoharu Seo Michihiko Toriumi Kazuhiko Yamada Takamasa Yamagami 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2008
The Scientific Balloon Center of ISAS/JAXA has carried out two balloon campaigns at Sanriku, Iwate, Japan every year. Ten to twelve balloon vehicles are launched annually for scientific and engineering experiments. Since 2005, a Brazilian balloon campaign has also been conducted in cooperation with INPE. In the 2006 Brazilian campaign, large and heavy payloads up to 1500 kg for astronomy will be launched. New generation balloons, such as super-pressure balloons and high-altitude balloons with ultra-thin films, are being developed. The current status and prospect of the Japanese scientific ballooning are discussed. 相似文献
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S. Drapatz L. Haser R. Hofmann N. Oda R. Wilczek 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1985,5(3):7-10
Far-infrared observations of the Galactic Center have been carried through with the MPE Im balloon-borne telescope “Golden Dragon”. The measurements are composed of photometric scanning (33–95 μm) of the inner 4′×4′ and low resolution spectroscopy (δν = 10 cm?1) of the center and of a position approximately 1.5′ to the north. A Mars spectrum has been obtained for calibration. The spatial resolution of the photometry map is increased using the Maximum Entropy Method and the resulting map is compared to other observations in the same and other spectral regions. A clear asymmetry in the ring-like structure around the center indicates the presence of noncircular motions. The shape of the spectra is fairly smooth with at least no prominent dust features. A simple modelling shows a drastic increase of column density within 2 pc from the center and a modest drop over the next 3 pc to the north. 相似文献
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Minoru Oda 《Space Science Reviews》1977,20(6):757-813
Among discrete galactic X-ray sources, Cyg X-1 has been noted for its peculiar features in several respects. It is one of
the few sources with a hard power law spectrum extending beyond several hundred keV. Cyg X-1 also distinguishes itself by
its profound time variability over a wide range of time scales. The most remarkable incident was that its optical identification
with a spectroscopic binary HDE226868 has led to a presumption that it is a black hole. This possibility has induced continuous
interests in the physical character of this source in conjunction with the nature of the black hole. The purpose of this paper
is to summarize presently available pieces of knowledge on this source to help the design of future experimental and theoretical
works, while the complexity of the source characteristics still has prevented us to construct a clear, coherent picture of
this source in spite of the fact that numerous observational facts have been accumulated. 相似文献
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JAXA has commenced technical research for contributing as a part of international partnership for the space exploration in Lunar vicinity. One of the candidates is the cargo transport mission with the combination of Cryogenic Propulsion Stage(s) (CPS) and a transfer vehicle derived from Japanese un-manned vehicle used for ISS. The CPS needs advanced technologies to keep the propellant for long mission duration and they will be useful in further missions beyond moon. This paper reports the profile of the mission, vehicle configurations, and the transport capabilities. 相似文献
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