2011 International Conference on Space Optical Systems and Applications (ICSOS)最新文献_第4页

Sun at the night 夜晚的太阳

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783668

Angusundaresh Krishnakumar, Balaviknesh Nagamanickam

{"title":"Sun at the night","authors":"Angusundaresh Krishnakumar, Balaviknesh Nagamanickam","doi":"10.1109/ICSOS.2011.5783668","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783668","url":null,"abstract":"Nowadays, the concentration of emerging technology is mainly based on the generation of electricity from sunlight by pollution free methods. The major problem in this type of power generation is the insufficient solar energy. This makes the generation of electricity dependent on nature. This phenomenon provides a solution for the above problem. In this phenomenon, parabolic reflectors or mirrors are placed either on the moon's surface or on the artificial satellite. By keeping parabolic reflectors or mirrors either on the moon's surface or on the artificial satellite, sunlight can be reflected earth making sunshine even during night. If a ‘Space Mirror’ with 40 meters diameter, thin, reflective film mounted on a satellite is kept, it reflects the sunlight about 5 to 7 kilometers in diameters on the earth. The brightness on the earth's surface is about 10 to 12 full moons (Lunettes). The thickness of reflector is about 7 microns. The thin film reflector wound on reels can be furled or unfurled according to the necessity. This phenomenon will reduce the power consumption using conventional power given to the remoteness, especially illuminating Arctic cities, in the permanent night of long winter. A constellation of large light reflectors could provide lighting to several large cities especially in Polar Regions","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124836722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical wireless power transmission at long wavelengths 长波光无线电力传输

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783662

A. Sahai, D. Graham

引用次数: 74

Studies on operation characteristics of triaxial telescope for satellite-ground laser communications 星地激光通信用三轴望远镜工作特性研究

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783713

Y. Takayama, Y. Koyama, Y. Shoji, M. Toyoshima

{"title":"Studies on operation characteristics of triaxial telescope for satellite-ground laser communications","authors":"Y. Takayama, Y. Koyama, Y. Shoji, M. Toyoshima","doi":"10.1109/ICSOS.2011.5783713","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783713","url":null,"abstract":"An approach to control the pointing direction of a telescope in which one more rotation axis is added to the conventional set of the azimuth axis and the elevation axis is studied. The aim is to find a possibility to reduce loads on driving mechanisms by decreasing the rotational angular velocity required when the telescope tracks a moving object. In such a tri-axial telescope system, the multiple sets of solutions are mathematically found as the rotation angles around the three axes respectively, because the pointing direction of the telescope can be in principle determined by two independent angles such as a set of the azimuth angle and the elevation angle. Therefore, to obtain the unique set of angles, the process to calculate the solution is divided into two steps. The algorithms are described, and the rotation angles and the angular velocities of the three axes are calculated with a case of a LEO satellite tracking. The results show that the tri-axial telescope can track the LEO satellite without the requirement of too fast rotation angular velocity even when the satellite passes through almost the zenith, which implies that the load on driving mechanisms can be reduced much.","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132026043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance analysis of time-diversity scheme through atmospheric turbulence by using beam tracking antenna 波束跟踪天线在大气湍流条件下的时分集性能分析

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783665

Huilin Jiang, Peng Liu, S. Tong

{"title":"Performance analysis of time-diversity scheme through atmospheric turbulence by using beam tracking antenna","authors":"Huilin Jiang, Peng Liu, S. Tong","doi":"10.1109/ICSOS.2011.5783665","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783665","url":null,"abstract":"Free space optical(FSO) communication can provide high bandwidth, high security communication services. it is attractive for its convenient establish the communication link and low power consuming. As the active received area of optical fiber is very small, when using optical fiber technology in FSO system, we must consider the effects of angle of arrival. Tracking subsystem is an effective method to mitigate the effects of turbulence. Using tracking system FSO demonstration, We found that when the turbulence is strong, the received power intensity fluctuation is very large. This is because when the turbulence is strong, the tracking error tracking subsystem increased a lot; therefore sometime the tracking system cannot focus the optical signal into the fiber. The bit error rate of communication system increase a lot. Time diversity is a useful technology for the time varied channel. We use theoretical analysis and did numerical simulations on the new scheme of time diversity FSO system with tracking antenna; The independent time interval of the system is also discussed. we found the new scheme can improve the throughput performance of conventional FSO system.","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115905876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Beaconless acquisition for ISL and SGL, summary of 3 years operation in space and on ground ISL和SGL的无信标采集，总结了3年的空间和地面操作

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783704

U. Sterr, M. Gregory, F. Heine

引用次数: 20

Deep space science downlinks via optical communication 深空科学下行通过光通信

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783718

R. Daddato, Klaus-Jürgen Schulz, I. Zayer

引用次数: 6

Adaptive channel coding for maritime FSO channels with RF feedback link 具有射频反馈链路的海上FSO信道自适应信道编码

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783696

M. Gregory, P. Hoeher

引用次数: 4

A study of an optical lunar surface communications network with high bandwidth direct to earth link 具有高带宽直连地球链路的月球表面光学通信网的研究

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783687

K. Wilson, A. Biswas, J. Schoolcraft

引用次数: 1

Deep space acquisition and tracking with single photon detector arrays 利用单光子探测器阵列进行深空探测与跟踪

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783654

W. Farr, S. Sburlan, A. Sahasrabudhe, K. Birnbaum

引用次数: 16

An interleaver-based atmospheric optical multiple access scheme: Capacity and BER performance 基于交织器的大气光多址方案:容量和误码率性能

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783680

Weiwei Zhang, Xiaolin Zhou, W. Shen

引用次数: 0