排序方式: 共有13条查询结果,搜索用时 31 毫秒
1.
The Galaxy Cluster Mass Scale and Its Impact on Cosmological Constraints from the Cluster Population
Pratt G. W. Arnaud M. Biviano A. Eckert D. Ettori S. Nagai D. Okabe N. Reiprich T. H. 《Space Science Reviews》2019,215(2):1-19
Space Science Reviews - The QB50 mission is a satellite constellation designed to carry out measurements at between 200–380 km altitude in the ionosphere. The multi-needle Langmuir probe... 相似文献
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Three 2.104 s observations were carried out with EXOSAT on three fields following the shock from the north to the east of the Cygnus Loop supernova remnant. Due to the softness of the source, most of the photons were collected with the LE package (CMA). For each exposure we used at least three filters (4000 Å lexan, Al-Par, boron) in order to extract the maximum spectral information from the data. The few photons gathered with the boron filter are particularly important in that respect. The total count number collected with the other filters allows a statistically significant overall mapping of the fields with 1*1 pixels, but a better resolution can be achieved on the brightest areas of the Loop. Interesting details are revealed, such as bright small spots. Irregularities are also evident both in the shock front and inside the remnant, specially in the northern and eastern fields. 相似文献
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Philippe Beaumier Gilles Arnaud Christophe Castellin 《Aerospace Science and Technology》1999,3(8):473-484
The performance prediction of helicopter in hover is of key importance for manufacturers because hover is a design configuration for the definition of a rotorcraft. A lot of effort has been made for more than 10 years all over the world in order to develop and validate numerical methods based on CFD. An Euler method (WAVES) developed by ONERA and coupled with a boundary layer code (MI3DI) is presented, validated and applied to compute the total performance of rotors with different tip shapes. A new boundary condition for the Euler code has been tested and enables better calculation by eliminating ‘numerical' recirculation. The code has demonstrated its ability to rank two rotors with different planforms in good agreement with experiment. Under industrial requirements new grid strategies have been studied and should allow to reduce CPU time consumption. It is shown that WAVES/MI3DI can be efficiently used in the aerodynamic design process of a new rotor. 相似文献
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Gillmann Cedric Way M. J. Avice Guillaume Breuer Doris Golabek Gregor J. Höning Dennis Krissansen-Totton Joshua Lammer Helmut O’Rourke Joseph G. Persson Moa Plesa Ana-Catalina Salvador Arnaud Scherf Manuel Zolotov Mikhail Y. 《Space Science Reviews》2022,218(7):1-21
Space Science Reviews - The BepiColombo Environment Radiation Monitor (BERM) on board the European Space Agency’s Mercury Planetary Orbiter (MPO), is designed to measure the radiation... 相似文献
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Arnaud Masson Ondrej Santolík Donald L. Carpenter Fabien Darrouzet Pierrette M. E. Décréau Farida El-Lemdani Mazouz James L. Green Sandrine Grimald Mark B. Moldwin František Němec Vikas S. Sonwalkar 《Space Science Reviews》2009,145(1-2):137-191
This paper highlights significant advances in plasmaspheric wave research with Cluster and Image observations. This leap forward was made possible thanks to the new observational capabilities of these space missions. On one hand, the multipoint view of the four Cluster satellites, a unique capability, has enabled the estimation of wave characteristics impossible to derive from single spacecraft measurements. On the other hand, the Image experiments have enabled to relate large-scale plasmaspheric density structures with wave observations and provide radio soundings of the plasmasphere with unprecedented details. After a brief introduction on Cluster and Image wave instrumentation, a series of sections, each dedicated to a specific type of plasmaspheric wave, put into context the recent advances obtained by these two revolutionary missions. 相似文献
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R. Rocchia M. Arnaud C. Blondel C. Cheron J. C. Christy R. Ducros L. Koch R. Rothenflug H. W. Schnopper J. P. Delvaille 《Space Science Reviews》1981,30(1-4):253-257
Conclusions The present results confirm the thermal nature of the interstellar soft X-ray emission and give rather clear evidence of the Oxygen and Carbon contribution. 相似文献
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M. J. Penn J. R. Kuhn J. Arnaud D. L. Mickey B. J. Labonte 《Space Science Reviews》1994,70(1-2):185-188
Observations made during the 1991 total solar eclipse and recent observations from NSO/Sac Peak are discussed. The ground-based density measurements will be complimentary to SOHO observations, particularly SOHO electron density measurements.Operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation 相似文献