CCSDS标准在新一代航天测控系统中的应用研究

介绍了CCSDS标准的背景、技术特点、我国航天测控标准的现状与趋势,以及新型号任务对兼容CCSDS标准的需求,分析了现有航天测控设备兼容CCSDS标准的技术条件及进一步功能扩展技术要求。     

浅谈劳务分包现状及发展趋势

目前建筑市场,工程总承包模式日渐成为主流,施工作业任务多由专业承包和劳务分包企业来完成.专业承包企业资质标准包含60个标准,劳务分包企业资质标准包含13个标准.在工程总承包体系中,劳务公司不断成长实力逐渐壮大,重要性日渐突出,一定程度上影响着总承包单位的全面管理.同时,劳务企业暴露出诸多的问题如：工人技术水平差、项目管理水平低、公司管理体系不健全等,针对劳务分包公司现状进行了分析并对未来发展需完善的方面做了阐述     

《电讯技术》专题资料 《国外航天测控技术的新发展》题要(四)

空军飞行试验中心的先进靶场遥测系统本文论述先进靶场遥测综合与支持 (ARTMI&S)计划的范围 ,该计划开始把ARTM研制的产品综合到空军飞行试验中心 (AFFTC)的现有遥测基础设施中。本文还将讨论为了继续支持试验和鉴定任务所需要的基础设施改造。还将论及很多挑战 ,包括变窄的航空频谱、老化的遥测基础设施以及需要更高的数据率。将讨论可能的方法 ,以解决不断出现的频谱侵蚀问题。未来的测控系统采用的高带宽效率的调制方式本文给出了用于测控的高带宽效率信号波形的初期研究结果。研究中包括国际空间数据系统咨询委员会 (CCSDS)和美…     

一种开放结构的遥测数据处理系统

可编程ＰＣＭ遥测系统，面对多数据流，高码率，变数据格式，复杂帧结构和不同的应用环境等特点，需要一种基于新的体系结构的数据处理系统。本文充分考虑了实时遥测数据处理的特点，分析了用于实时遥测数据处理系统的开放体系结构，陈述了此开放体系结构的方案和设计，给出了分布式网络系统的结构模型，开发了网数据库和遥测数据库之间，人机之间的接口。最后，文中建立了一种遵循开放体系结构的实用，多功能实时遥测数据处理系统，     

《电讯技术》专题资料 《国外航天测控技术的新发展》(二)

日本宇宙事业开发团新一代地面网的测控系统根据日本宇宙事业开发团 (NASDA)关于升级卫星地面网 (GN) ,提供全球覆盖和与其它国家航天局的互操作性的决定 ,三菱电子公司 (MELCO)安装了带有L - 3通信公司遥测设备和仪器分公司 (L - 3T&I)“网星”(NETstar) 2 0 0 0TT&C系统的远方地面站。三菱电子公司研制的软件控制着远方站的各种COTS产品 ,包括L - 3T&I系统。L - 3T&I的TT&C系统为各种LEO/MEO/GEO卫星提供调制解调、高精度测距、多普勒校正、指令校验和CCSDS协议处理。低成本移动发射靶场安全系统的验证弹道导弹靶场安…     

一种基于再生伪码测距的遥测信号测距方法

为了简化深空探测器无线测量系统设计,解决下行系统受功率、带宽等因素限制遥测信号和测距信号权衡设计问题,在再生伪码测距技术的基础上,提出了一种基于遥测信号测距的新方法,以遥测数据符号代替测距伪码的功能,利用地面跟踪环路对遥测信号的跟踪测量实现下行测距,减少了独立的下行测距信号。分析和仿真结果表明：新方法简化了下行信号形式,降低了系统实现复杂度,在遥测码速率为100 kbit/s左右时,随机测距误差优于传统再生伪码测距模式,且随着遥测码速率的增加测距精度进一步改善。     

CCSDS标准的研究和基于EOS—AM的工程实现

本文简要介绍了CCSDS和EOSDIS的技术背景，详细阐述了CCSDS制定的关于信道码和数据传输的标准，并且结合研制的EOS－AM遥感卫星数据接收机，分析了解调和编解码的关键技术。     

通用无人机测控系统与关键技术

针对目前国内各型无人机测控系统互不兼容、各型无人机与不同的地面站难以互联互通问题，提出了一种通用无人机测控系统的解决方案，并分析了方案中的链路通用抽象模型、遥控遥测协议标准、链路波形标准等关键技术。实际测试表明，所提解决方案可以实现整个测控系统的通用性，机载测控端和地面测控站都可以适配多型无人机。     

浅谈地面气象观测仪器的日常管理与维护

经由广东省气象计算机应用开发研究所所研发并投入应用的DZZ1-2遥测自动气象站是现阶段广泛应用于气象站台地面气象观测数据采集、处理以及储存的综合性设备。为确保DZZ1-2遥测自动气象站在地面气象观测过程中的质量得到充分且有效发挥,对其进行系统且规范的日常管理与维护无疑有着重要意义。本文依据这一实际情况,以DZZ1-2遥测自动气象站地面气象观测仪器为研究对象,针对相关设备在正常使用过程中的管理与维护要点这一中心问题展开了较为详细的分析与阐述,并据此论证了遥测自动气象站在提高地面气象观测数据精确性与有效性的过程中所发挥的重要作用与意义。     

混沌遥测及其非合作信号检测与参数估计

从混沌伪码序列的产生机理出发,分别从量化混沌遥测信号检测、实值混沌遥测信号识别和 混沌遥测系统参数估计方面分析了可供非合作者利用的特征和方法。提出了基于Duffing振 子的混沌遥测信号检测方法,以及基于相空间重构的遥测信号识别方法和基于混沌同步的遥 测系统参数估计方法。仿真分析表明所构造方法可以实现对混沌遥测信号的非合作分析。     

Brown＇s Blossom in Britain-China

The overall strategic relationship between U.K. and China is ＂better than ever＂, China- Britain relations have maintained good momentum, with increased high-level exchanges and the reinforcement of strategic mutual trust, with more room for growth in the future.     

Challenge and Opportunity Go Hand in Hand——What Global Economic Agitation Brings to the China's Economy?

Domino effects of the global finance agitation As the origin of the subprime crisis,US financial institutions lost USS45 billion last year,accounted for over half of the total US,EU & Japan loss.Since January 15th,Chtigroup released its financial statement of the 4th quarter,showing a net deficit of USS9.83 billion,which marked the hisoric high of its quarterly deficit.     

Sinosteel：Extraordinary Moves in Industry Chess

Among the Fortune 500 firms,more and more images from China emerge out.On the 2008 list,Sinosteel Corporation,a landmark group of China industries quietly squeezes into the candidate line.As the largest steel service ＆ trade enterprise,its sales reached at RMB 111.24 billion,with a year-on-year increase of 83.03 percent,and the profit grew by 180.03 percent.On the Sinosteel 2008 Work Meeting,the president Huang Tianwen uttered,＂In the coming year,we will work for US$20 billion sales,and look forward to getting a position in Fortune 500 firms for ourselves.＂     

Walk Through Unusual Five Years—— An Exhibitor＇s Canton Fair Course

When the 103rd Canton Fair is approaching, an old friend of Canton Fair, Li Ying from Jiangsu prov-ince recollected his past five years＇ experiences to the grand trade meeting. Each year is special, with some unforgettable memories colored by the year.     

Jean-Pierre Duprieu： Willing to Be A Legate of Sino-French Business

Estaing, former French president, Valery Giscard d＇Estaing attended Sino-French Economic Seminar held in Shanghai in early April and said that the world center has shifted from the west to the east with many European and US companies entering into Asia, and China has the ability to play an important role in the world stage. Estaing, naming himself＂French Confucian＂, then said in Chinese that a cook-group includes 10 people in ancient Chinese soldier system and the cook is in charge of cooking for them. And people who belong to the same cook are actually ＂Partners＂.     

China''''s Stock Market Wave

The annual meeting of the World Economy Forum was held in Davos,a little town in Switzerland,on January 23rd to the 27th this year,with the theme"the Power fo Collaborative Innovation",over 2500 celebrates from ture political and cconomic circles of more than 80 countries and challengred logether to talk about the future of the global economy in 2008,A Forum for the problems and challenges that face whole world,some of the keywords which drew attention during the event were:the U.S.subprime mortgage crisis,soaring energy prices,the economic slowdown in the U.S.ermerging economic bodies,authority funds and the general unpredictable nature of the global economy.     

Trade Promotion from Neighborhood

If you are considering to trade with companies in Japan or expanding your .business to Japan, we are ready to help from the very beginning.＂ You will find this greeting at the first sight on the Chinese website of Japan External Trade Organization （JETRO）. JETRO has committed itself in delivering highly efficient and quality services to meet the demand of internal and external customs including Japanese companies, hence winning a good reputation in the international trade arena. In recent years, with its priority in advancing business cooperation in South and East Asia, JETRO has made great achievement in promoting trade between China and Japan. Therefore, China＇s Foreign Trade interviewed Mr. Yoichi Maine, Deputy Director General of JETRO BEIJING.     

Auto Parts Market Potential Coming into Surface

Looking at the increasingly fierce competition in the world auto market. global automobile manufacturing industry, taking Europe, the U.S. and Japan as representatives, is gradually forming a new type of relationship, mutual cooperation between whole vehicle and parts manufacturers. We can clearly see that auto parts manufacturers have become independent from the whole vehicle manufacturing companies, which means that the former structure of auto industry has greatly changed, and a new relationship,     

Public Financial Expenditure——A Reflection of the Livelihood Improvement

In recent years.China's public finance put social construction high on the agenda and attaches more importance on livelihood insurance and improvement.The 2003-2007 public financial expenditure reflects a fact that the government isputting more emphasis on livelihood andissues concerning the people.     

Voices from the MPC and CPPCC

"Crucial for economic growth.energy utilization has its role in all economic sectors and every aspect of people's daily life.Now we are in dire need of a new profession,namely energy manager.We not only need to have passion and responsibility,but also a scientific approach to conserve energy and cut emissions.APpropriate legislation should be in place.and a special profession should be introduced to ensure the implementation of these laws and regulations."