Results 71 to 80 of about 296,490 (359)
, 1967 Communications, meteorological, and scientific experiments for applications technology satellite having passive gradient control ...
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Advanced Optical Materials, EarlyView.Chalcogenide phase change materials (PCMs) demonstrate a significant switchable volatile thermo‐optic response across visible and telecommunication bands. A broadband measurement is presented showing that some alloys exceed traditional reconfigurable materials in photonic integrated circuit (PIC) applications.
Mahirah Zaini +6 more
wiley +1 more source
A Study on Fuel Estimation Algorithms for a Geostationary Communication & Broadcasting Satellite [PDF]
Journal of Astronomy and Space Sciences, 2000 It has been developed to calculate fuel budget for a geostationary communication and broadcasting satellite. It is quite essential that the pre-launch fuel budget estimation must account for the deterministic transfer and drift orbit maneuver ...
Jong Won Eun
doaj
Plan of advanced satellite communication experiments using ETS-6 [PDF]
In 1992, an Engineering Test Satellite 6 is scheduled to be launched by an H-2 rocket. The missions of ETS-6 are to establish basic technologies of inter-satellite communications using S-band, millimeter waves and optical beams and of fixed and mobile ...
Ikegami, Tetsushi
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Satellite system performance assessment for in-flight entertainment and air traffic control [PDF]
, 2007 Concurrent satellite systems have been proposed for IFE (In-Flight Entertainment) communications, thus demonstrating the capability of satellites to provide multimedia access to users in aircraft cabin. At the same time, an increasing interest in the use
Bousquet, Michel +3 more
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Advanced Optical Materials, EarlyView.An optimized Mo‐doped NiO (MNO) film is developed using a magnetron sputtering process to overcome the limitations of pristine NiO in electrochromic (EC) applications. The MNO film exhibits improved optical modulation, faster response time, and enhanced cycling stability compared to pristine NiO.
Chang‐Shin Park +7 more
wiley +1 more source
Orbit Determination Error Analysis for the KOMPSAT [PDF]
Journal of Astronomy and Space Sciences, 1998 Orbit error analysis was performed for the GPS navigation solutions and ground station tracking data of the KOMPSAT (Korea Multi-Purpose SATellite), which will be launched in 1999 for cartography of Korean peninsula as main mission. A least square method
Jeong-Sook Lee, Byoung-Sun Lee
doaj
A review of fade detection techniques [PDF]
Several proposed propagation fade detection techniques are reviewed in light of general requirements presented for beacon fade characterization. The discussion includes an analysis of phase lock versus frequency lock beacon tracking loops and of excess ...
Pergal, F. J.
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Carbon‐Coated Moth‐Eye Structure: An Ultrabroadband THz‐DUV Near‐Perfect Absorber
Advanced Optical Materials, EarlyView.A silicon moth‐eye surface coated with pyrolytic carbon achieves >98% absorption from 1 to 1200 THz by combining gradient‐index matching with PyC's broadband conductivity, forming an ultra‐broadband absorber from THz to deep UV. Experimental results and simulations agreed well.
Yuki Hakamada +18 more
wiley +1 more source
OPEX: (Olympus Propagation EXperiment) [PDF]
The Olympus-1 satellite carries four distinct payloads for experimental utilization and research in the field of satellite communications: (1) the Direct Broadcasting Service (DBS) payload; (2) the Specialized Services Payload; (3) the 20/30 GHz Advanced
Brussaard, Gert
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