Results 41 to 50 of about 6,166,267 (187)
Optical-SDMA for Broadband Aeronautical Communications" [PDF]
, 2003 Broadband communication for aircraft passengers is facing one of the most promising markets of near future. While currently systems introduced in L and Ku band are already limited in bandwidth considering service provisioning to several airline fleets ...
Giggenbach, Dirk +3 more
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Reduction and analysis of one-way laser ranging data from ILRS ground stations to LRO [PDF]
, 2013 One-way LR (Laser Ranging) is being performed routinely from ILRS (International Laser Ranging Service) ground stations to LOLA (Lunar Orbiter Laser Altimeter), onboard NASA’s LRO (Lunar Reconnaissance Orbiter).
Schreiber, Ulli +11 more
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Laser Communication Satellite Experiment /LCSE/ [PDF]
, 1966 Equipment descriptions and procedures for Laser Communication Satellite Experiment ...
Wischnia, H. F.
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Advances and Prospects of Free Space Optical Communication in Space Applications [PDF]
علوم، فناوری و کاربردهای فضاییThis research aims to investigate the emerging technology of free-space optical communication and its applications in the space industry. By employing light beams as information carriers, this technology offers significantly higher bandwidth and enhanced
Javad Haghshenas
doaj +1 more source
Acquisition Time in Laser Inter-Satellite Link Under Satellite Vibrations
IEEE Photonics Journal, 2023 Pointing, acquisition, and tracking (PAT) is a major technical challenge of laser inter-satellite links (ISLs). For the fast establishment of laser link and the maximization of communication time, it is of importance to minimize the acquisition time ...
Kwanyong Lee, Vuong Mai, Hoon Kim
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A Raman laser system for multi-wavelength satellite laser ranging
, 2004 In order to develop a laser system for multi-wavelength satellite laser ranging, the joint group of the Shanghai Astronomical Observatory and the Czech Technical University has studied the conversion efficiency of the Raman-shifting beam and its spatial ...
Hamal, K +5 more
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Temperature measurement inside and near the weld pool during laser welding [PDF]
, 1999 The work in this article deals with the measurement of temperature fields inside and near the weld pool during laser welding. The laser source used for this study is a 7.5 kW CO2 laser, and the welded material is a UNS N08904 austenitic stainless steel ...
J. Quesada +9 more
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Tongxin xuebao, 2020 In order to alleviate the influence of atmospheric turbulence on the performance of satellite-to-ground laser communication system,based on the M-distribution atmospheric channel model,a multi-carrier coherent orthogonal frequency division multiplexing ...
Yi WANG, Yaping WANG
doaj +2 more sources
IEEE Access, 2019 Vibration interference reduces the precision of the control system and leads to the instability of the satellite optical communication link. So how to improve the tracking accuracy of the terminal system under vibration conditions is an important work ...
Yunjie Teng, Min Zhang, Shoufeng Tong
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Evaluation of the Scintillation Loss for Optical Communication Systems with Direct Detection [PDF]
, 2006 In optical communications through the atmosphere, the evaluation of a link feasibility often requires the quantification of the scintillation penalty in terms of power loss. To find how much additional optical power is needed to reach the bit-error-rate (
Perlot, Nicolas
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