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The paper describes a recent effort to design, build, and test a 77 GHz radar to be used for “intelligent” cruise control of automobiles. An analysis of requirements is given, design trade-offs are accounted for, and main features of prototypes in manufacturing are detailed. The radar has been thoroughly tested and evaluated both under “controlled” conditions and on roads, also in dense traffic. Results so far are very promising 相似文献
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J. G. Trotignon J. L. Michau D. Lagoutte M. Chabassière G. Chalumeau F. Colin P. M. E. Décréau J. Geiswiller P. Gille R. Grard T. Hachemi M. Hamelin A. Eriksson H. Laakso J. P. Lebreton C. Mazelle O. Randriamboarison W. Schmidt A. Smit U. Telljohann P. Zamora 《Space Science Reviews》2007,128(1-4):713-728
The main objective of the Mutual Impedance Probe (MIP), part of the Rosetta Plasma Consortium (RPC), is to measure the electron
density and temperature of Comet 67P/Churyumov-Gerasimenko’s coma, in particular inside the contact surface. Furthermore,
MIP will determine the bulk velocity of the ionised outflowing atmosphere, define the spectral distribution of natural plasma
waves, and monitor dust and gas activities around the nucleus. The MIP instrumentation consists of an electronics board for
signal processing in the 7 kHz to 3.5 MHz range and a sensor unit of two receiving and two transmitting electrodes mounted
on a 1-m long bar. In addition, the Langmuir probe of the RPC/LAP instrument that is at about 4 m from the MIP sensor can
be used as a transmitter (in place of the MIP ones) and MIP as a receiver in order to have access to the density and temperature
of plasmas at higher Debye lengths than those for which the MIP is originally designed. 相似文献
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A. I. Eriksson R. Boström R. Gill L. Åhlén S.-E. Jansson J.-E. Wahlund M. André A. Mälkki J. A. Holtet B. Lybekk A. Pedersen L. G. Blomberg 《Space Science Reviews》2007,128(1-4):729-744
The Rosetta dual Langmuir probe instrument, LAP, utilizes the multiple powers of a pair of spherical Langmuir probes for measurements
of basic plasma parameters with the aim of providing detailed knowledge of the outgassing, ionization, and subsequent plasma
processes around the Rosetta target comet. The fundamental plasma properties to be studied are the plasma density, the electron
temperature, and the plasma flow velocity. However, study of electric fields up to 8 kHz, plasma density fluctuations, spacecraft
potential, integrated UV flux, and dust impacts is also possible. LAP is fully integrated in the Rosetta Plasma Consortium
(RPC), the instruments of which together provide a comprehensive characterization of the cometary plasma.
The LAP Team is listed in Table III. 相似文献
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The FIELDS Instrument Suite on MMS: Scientific Objectives,Measurements, and Data Products 总被引:1,自引:0,他引:1
R. B. Torbert C. T. Russell W. Magnes R. E. Ergun P.-A. Lindqvist O. LeContel H. Vaith J. Macri S. Myers D. Rau J. Needell B. King M. Granoff M. Chutter I. Dors G. Olsson Y. V. Khotyaintsev A. Eriksson C. A. Kletzing S. Bounds B. Anderson W. Baumjohann M. Steller K. Bromund Guan Le R. Nakamura R. J. Strangeway H. K. Leinweber S. Tucker J. Westfall D. Fischer F. Plaschke J. Porter K. Lappalainen 《Space Science Reviews》2016,199(1-4):105-135
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C. Carr E. Cupido C. G. Y. Lee A. Balogh T. Beek J. L. Burch C. N. Dunford A. I. Eriksson R. Gill K. H. Glassmeier R. Goldstein D. Lagoutte R. Lundin K. Lundin B. Lybekk J. L. Michau G. Musmann H. Nilsson C. Pollock I. Richter J. G. Trotignon 《Space Science Reviews》2007,128(1-4):629-647
The Rosetta Plasma Consortium (RPC) will make in-situ measurements of the plasma environment of comet 67P/Churyumov-Gerasimenko.
The consortium will provide the complementary data sets necessary for an understanding of the plasma processes in the inner
coma, and the structure and evolution of the coma with the increasing cometary activity. Five sensors have been selected to
achieve this: the Ion and Electron Sensor (IES), the Ion Composition Analyser (ICA), the Langmuir Probe (LAP), the Mutual
Impedance Probe (MIP) and the Magnetometer (MAG). The sensors interface to the spacecraft through the Plasma Interface Unit
(PIU). The consortium approach allows for scientific, technical and operational coordination, and makes optimum use of the
available mass and power resources. 相似文献
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