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Study of a Bistatic Radar System Using VLBI Technologies for Detecting Space Debris and the Experimental Verification of its Validity 总被引:1,自引:0,他引:1
Masanobu Yajima Kazutomo Tsuchikawa Toshiyuki Murakami Kazuyoshi Katsumoto Tadashi Takano 《Earth, Moon, and Planets》2007,100(1-2):57-76
Space debris are increasing around the Earth. The observation of space debris is a key issue for the investigation and monitoring
of space environment. But the observation opportunities and the detection ability are limited in existing monostatic radar
systems. This paper proposes a bistatic radar which is composed of a transmitting station and a receiving-only station. A
carrier wave modulated by PN-PSK signals is used in combination with a VLBI (Very Long Baseline Interferometry) recorder for
range measurement between space debris and stations. The receiving radio wave is processed on the basis of VLBI techniques.
Accordingly, the system is shown to have significant advantages over a monostatic radar. We actually formed a bistatic radar
system, and observed a satellite in order to experimentally verify the validity. The configuration of the system, data analysis
and the experimental results are described. 相似文献
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Akira Ohtsuki Masanori Hirota Kikuo Ishimura Kazutomo Yokoyama Kiyoshi Fukutake 《地震工程与结构动力学》1992,21(7):591-607
The verification of a two-dimensional non-linear analysis based on a hybrid constitutive model, which consists of the Ramberg-Osgood model extended to two-dimensional problems and a dilatancy model, is discussed through a comparison of the shaking-table test results for a one-storey structure standing on a dry sandy deposit with those for the same on a saturated sandy deposit. Since the relationships G vs. γ and h vs. γ for shear strains of 10?5?10?3 can be obtained accurately by an inversion analysis of the resonance curve of the sandy deposit the proposed non-linear method can represent well the observed non-linear response of the dry or the saturated sandy deposit including the structure. This method, however, should be applied carefully to assess the response of a soil-structure system when the three-dimensional interaction affects significantly the response of the model. An equivalent linear analysis using a sway-rocking model is applied to simulate the non-linear ground motion including the three-dimensional interaction, and it is found that the sway-rocking model can also represent well the non-linear response of the system. 相似文献
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