东北地区首家民航机场建设监理咨询公司成立

3月1日，由沈阳空管技术开发有限公司、沈阳民航广通实业公司、沈阳广通测绘设计有限公司三家公司参股组建的沈阳东北民航机场建设监理咨询有限公司取得了沈阳市工商行政管理局颁发的企业法人营业执照，意味着东北地区首家民航机场建设监理咨询公司正式成立，添补了东北地区机场工程建设监理咨询领域的空白。[第一段]     

助推吉林经济实现吉林民航东北“中部崛起”目标

吉林省民航机场集团公司隶属于首都机场集团公司,下辖长春龙嘉国际机场、延吉朝阳川机场和正在建设中的长白山机场。在首都机场集团的正确领导下,吉林机场集团紧紧围绕力争实现吉林民航业在"东北地区中部崛起"的战略目标,     

成都西南民航空管工程建设有限责任公司

成都西南民航空管工程建设有限责任公司创建于1987年，是一家具有独立法人资格的股份公司，20年来本公司始终立足于服务西南地区民航建设，积极参与民航机场空管工程建设及目视助航灯光设备的安装调试，先后取得由建设部颁发的机场空管工程及航站楼弱电系统工程专业承包一级、机场目视助航工程专业承包一级资质，     

民航机场对地方经济发展的关联度和贡献度的测算研究

采用2011和2012年我国各省（直辖市、自治区）、计划单列市和各省省会城市生产总值与机场吞吐量进行横向、纵向整体比较和抽样分析，分析机场与地方经济发展的相关关系，得出了三个定性化的结论。同时，选定了测算机场吞吐量对地方经济贡献度的方法——道格拉斯生产函数法，以广西壮族自治区为样本进行了定量化分析，得出了一个贡献弹性系数经验值。通过定性和定量、整体和抽样的分析研究，证明了民航机场对地方经济发展的重要性，以及我国各地加快机场建设，对于地方经济发展的积极和深远意义。     

国产数字内话落户青岛流亭国际机场

6月28日,沈阳空管技术开发有限公司的AT—VCS0422数字内话系统在青岛流亭国际机场内话系统设备及安装等相关服务项目招标活动中中标,意味着技术公司首次与民航机场联手,将国产内话设备应用于机场运行指挥中心,拓宽了国产内话系统的市场覆盖面。至此,该系统已拥有19个用户,实现了在民航空管系统、航空公司、支线机场空管和机场运行指挥系统四大领域的应用。     

高原机场风切变探测系统的构建分析及研究展望

我国西部地区的高原民航机场,由于海拔高、地形条件及净空条件较差、气候复杂,导致机场的正常使用率低、因气象原因引起的航班不正常比例较大,切实提高对机场飞行区雷暴、湍流、风切变等天气的预警能力是未来高原机场气象服务的迫切要求和重要工作内容,其中机场终端区风切变探测系统的构建模式及配置方式是目前亟需研究的问题。     

高原机场的复杂天气与飞行气象服务

高原机场，尤其是青藏高原的机场，坐落在高原山地或崇山峻岭之中。青藏高原复杂的地形地理环境，以及印度季风与亚洲大陆季风在高原东部的交汇，构成了高原机场复杂多变的天气气候的背景因素。青藏高原地区复杂的大气环境，极大地增加了航空安全飞行的难度，备受国内外民航界的关注。新中国民航先后开航了二十多个高原机场     

MITRAS大气透射仪污染检测的故障检修

引言跑道视程(runway visual range,简称RVR)是机场运行标准重要指标之一,而目前中国所有大中型民航机场几乎都是使用芬兰VAISALA公司生产的MITRAS大气透射仪来测量、提供RVR值。MITRAS的工作原理是通过测量大气透射率、大气背景光亮度,并结     

把握大局 注重细节——管制经验浅谈

目前,浙江省内已建成干线机场3个,支线机场4个,初步形成了以杭州为轴心,宁波、温州为副轴心,舟山、义乌、黄岩、衢州等为辐射点的民用航空交通网络,此外杭州管制区及其航线还辐射至南京／禄口、黄山／屯溪、上海／虹桥、上海／浦东等四个民航机场。管制区内还有安吉、桐庐、杭州浙二医院等三个通用／急救直升机场。杭州管制区东西向350公里、南北向420公里,航线纵横交错,汇聚了国际航线、国内航线、地方航线共22条。2008年杭州机场日均起降330架次左右。     

中小机场气象信息服务网络解决方案

在民航发展“十五”计划中，信息化建设被列为三大建设重点之一，提高民航信息化整体水平将对民航企业核心竞争力产生重大的影响。航空气象信息作为保障安全飞行的重要资料，一直是各机场不可或缺的。国内大型机场经过多年规划建设已经拥有比较健全的气象设备，而中小型机场由于认识、资金等方面的原因，在气象设备的基础建设上和各大机场有着明显的差距。所以，在有限的条件下，以大型机场为中心，发挥大型机场气象设备完善的优势，利用信息网络的特点，对中小型机场提供气象信息服务是十分可行的。笔者结合实际的工程建设经验探讨中小型机场气象信息服务网络化的原则、需求与目标，讨论如何规划和建设一个高可用性、高安全性、低成本的气象信息服务网络，并以昆明空管中心的气象信息服务网络为案例进行具体的分析。     

Decision program on asteroid threat mitigation

The Association of Space Explorers Committee on Near-Earth Objects (NEOs) and its Panel on Asteroid Threat Mitigation have prepared a decision program to aid the international community in organizing a coordinated response to asteroid impact threats. The program is described in the ASE's report, Asteroid Threats: A Call for Global Response, which will be considered by the United Nations Committee on the Peaceful Uses of Outer Space in its 2009 sessions. The findings and recommendations of this report are presented here as well as some of the major implications of the complex decision-making involved in developing a coordinated international response to the challenge of protecting the Earth from NEO impacts.     

"Signal" search for intelligence in the galactic nucleus with the array of the Lowlands

In August, 1981, the Westerbork Synthesis Radio Telescope was used for 4 h to search for narrowband pulsing radio beacons in the direction of the Galactic Center. By using both the spatial discrimination and temporal stability available to an interferometric measurement, weak intermittent signals can be detected even in the face of the strong, naturally caused radiation from this region. A radio beacon within our bandwidth, centered on the 21 cm neutral hydrogen line, would be recognizable if it had a repetition period between 40 sec and 1/2 h. The rms sensitivity to point sources was approximately 50 mJy/cycle, and the detection limit was 500 mJy/cycle. The limit degrades for pulse widths < 0.02s. No repetitive signals were found. For a swept, narrow-band radio beacon constrained to the Galactic Disk (beamwidth = 0.02 rad), our detection limit corresponds to a transmitter power of 10(11) MW at the Galactic Center.     

Space policy challenges facing the Barack Obama administration

President Barack Obama faces space policy challenges in security, commercial and civil areas in an era in which the use of space assets for these ends is irreversible. The very future of space is linked to addressing the challenges within the first term of the Obama administration. This paper draws on, but does not attempt to summarize, discussions at the National Space Forum 2008 organized by the Eisenhower Center for Space and Defense Studies at the United States Air Force Academy and the Center for Strategic and International Studies (CSIS) in Washington, DC. The goal of the forum was to examine the key decisions that will need to be made in regard to space policy by facilitating debate among the security, commercial and civil space sectors, and the broader national policy community. The paper focuses on choices which, for budgetary or other reasons, cannot be delayed. A brief discussion of the issues surrounding each choice is presented, followed by the implications of pursuing different choices. One key assumption underlies everything: resources available for activities in space will not grow significantly in real terms over the course of the Obama administration.     

CBERS-1卫星IRMSS数据在中国北方汝箕沟煤田煤层自燃区遥感分析中的试应用研究

根据热红外波段对地物热信息反映灵敏的特征 ,基于CBERS-1卫星红外多光谱扫描仪(IRMSS)所获得的2000年7月1日宁夏汝箕沟地区的图像数据 ,首先进行错位纠正、去条带、消除随机噪声等处理。通过对IRMSSB6、B7、B8、B9单波段的线性拉伸、指数变换、主成份分析 ,以及IRMSSB6、B7和B8、IRMSSB6、B7和B9的假彩色合成处理、波段运算等增强处理 ,有效地提取了由煤层自燃引起的地表热异常 ,以及煤堆、裸岩、居民区的热异常信息。通过分析对比 ,对IRMSS图像数据进行煤火信息提取进行了评价     

SPHERES flight operations testing and execution

Synchronized Position Hold Engage Reorient Experimental Satellites (SPHERES) is a formation flight testing facility consisting of three satellites operating inside the International Space Station (ISS). The goal is to use the long term microgravity environment of the ISS to mature formation flight and docking algorithms. The operations processes of SPHERES have also matured over the course of the first seven test sessions. This paper describes the evolution of the SPHERES program operations processes from conception to implementation to refinement through flight experience. Modifications to the operations processes were based on experience and feedback from Marshall Space Flight Center Payload Operations Center, USAF Space Test Program office at Johnson Space Center, and the crew of Expedition 13 (first to operate SPHERES on station). Important lessons learned were on aspects such as test session frequency, determination of session success, and contingency operations. This paper describes the tests sessions; then it details the lessons learned, the change in processes, and the impact on the outcome of later test sessions. SPHERES had very successful initial test sessions which allowed for modification and tailoring of the operations processes to streamline the code delivery and to tailor responses based on flight experiences.     

China’s Global Space-based TT&C Network System Established

The Tianlian 1-03 satellite, the third geosynchronous data relay satellite of China, was successfully launched into space on a LM-3C launch vehicle from the Xichang Satellite Launch Center at 23:43 Beijing time on July 25. Twenty-six minutes after the liftoff, the satellite separated     

Sooting and disruption in spherically symmetrical combustion of decane droplets in air

Results of experiments are reported on the burning of individual decane droplets, initially between 1.0 and 1.2 mm in dia, in air at room temperature and atmospheric pressure. Use was made of the 2.2 s drop tower at the NASA Lewis Research Center and a newly designed droplet-combustion apparatus that promotes nearly spherically symmetrical combustion. Unanticipated disruptions were encountered and related to sooting behavior.     

基于网络效用的OFDM卫星移动通信系统呼叫接纳控制

在天地一体化网络中,OFDM卫星移动通信系统更有利于与地面无线网络融合。呼叫接纳控制是无线资源管理中的关键问题,本文针对OFDM卫星移动通信系统提出了一种基于网络效用和动态系统资源的星上呼叫接纳控制方法,采用集中式接纳控制,对卫星系统资源的集中管理可有效降低呼叫等待时延。所提出的接纳控制方法基于不同业务的网络效用函数,采用跨层设计思想,根据物理层卫星信道状态变化更新OFDM子载波传输能力,在呼叫接纳控制过程中动态调整分配业务带宽,实现整个网络效用最大化,同时保证业务的QoS要求。仿真结果表明,在系统业务负载饱和的情况下,该方法系统资源利用效率显著优于基于用户端最小阻塞概率的接纳控制方法和基于用户端业务QoS的接纳控制方法,非常适合于资源受限的卫星系统。     

NASA and the phenomenology of discovery: Vigilance,work conditions,and a renewed space policy

As NASA works to redefine the meaning of its mission, two social scientists apply tools from phenomenology to explore how an agency, on the cusp of new thought, is tasked with discovery. Sources for the analysis include interviews, observations, case files and documents before and after a site visit to Johnson Space Center in Houston, Texas. Findings suggest that NASA should consider creating an internal office of phenomenological inquiry designed to recognize phenomenology at work as a fundamental approach for discovery. A special note of appreciation is extended to NASA for fostering and encouraging access to their organization to observe operations at the side of astronauts in training, engineers and scientists at work, and managers overseeing a Space Shuttle mission.