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在对目前区域型连续运行基准站网存在的问题进行分析的基础上,对大规模连续运行基准站网的概念、特征和建设基础进行了探讨.基于网格技术,给出了大规模连续运行基准站网的体系结构、数据采集、数据处理与服务模式的建立与重构方法,提出了虚拟基准站网(VCORS)的概念,对虚拟基准站网的服务漫游与无缝切换进行了讨论,并给出了初步的解决方案. 相似文献
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基于大规模GNSS基准站网数据处理中的相关理论和技术,介绍了高精度数据软件及精密数据处理方法,以江苏连续运行参考站网(以下简称江苏CORS)为例,探讨分析了子网划分策略的可行性,给出了适用于大规模GNSS基准站网数据处理的原则,并将其结果与整体平差进行了比较分析,对大规模GNSS基准站网中子网划分方法提出了建议。 相似文献
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国内GNSS连续运行基准站网建设全面展开,很多省、市建成或正在建设基准站网,部分地区已经开始对社会提供服务。介绍基准站网建设情况和相关规范的现状,对站网进行分类,并就基准站网的建设、技术和服务的相关技术问题进行探讨和分析。 相似文献
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我国CORS发展与技术应用 总被引:1,自引:0,他引:1
《中国测绘》2016,(1)
正卫星导航定位技术的发展与应用改变了传统的测量技术手段,综合应用GNSS技术、信息技术、网络技术等建设的连续运行基准站网,已成为国家信息化建设的基础设施主要组成部分。连续运行基准站网(CORS,Continuously Operating Reference Station)包含一个或若干个固定的、连续运行的GNSS连续运行基准站,利用现代计算机、数据通信、互联网技术组成的数据传输网络,经过数据中心对数据连续实时地高精度 相似文献
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大规模GNSS基准站网快速同步处理方法研究 总被引:3,自引:0,他引:3
目前我国GNSS连续运行基准站网已基本建设完毕,全国范围内建设完成约2000个GNSS连续运行基准站。随着站点规模的加大,数据计算的效率也迫切需要提高,采用传统的高精度数据处理软件已适应不了大规模GNSS网的数据解算要求。本文基于BERNESE5.2软件研究了我国“陆态网络工程”260个基准站的大规模GNSS网同步数据处理方法,通过修改源程序及利用并行计算技术,成功实现了陆态网络基准站快速、高效、高精度的数据计算能力。实例验证表明,陆态网络单天260个站的数据在无需分区的情况下,可在1 h内获得全球框架下的约束解,解算的框架点坐标精度在毫米量级,大大提高了国家数据中心的大规模GNSS网数据处理能力。 相似文献
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介绍了国家GNSS连续运行基准站网建设的设计思路、布设原则、性能要求及系统组成部分,阐述了基准站基础设施施工、通信网络接入及防雷接地系统等施工建设的技术设计和建设要求,并对基准站设备安装、远程监控和数据传输等系统集成内容进行了描述,最后对系统应用进行了展望。 相似文献
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采用Landsat TM数据分析了阿克苏河—塔里木河断面水质污染状况,通过波段的DN值和常规监测数据建立能反映水质状况的
污染物监测模型。结果发现,将2000年常规监测数据代入模型后,与遥感数据的结果基本吻合| 重建阿克苏河—塔里木河的连续水体
污染变化曲线,得出污染物浓度随着远离上游而增加。 相似文献
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ZHAN F. Benjamin 《地球空间信息科学学报》2011,(1)
Although it is well known that coseismic gravity changes take place during an earthquake, previous research has not yielded convincing evidence demonstrating that significant gravity changes occur before large earthquakes. Furthermore, even if we suspect that gravity changes occur before large earthquakes, we have yet to demonstrate how to consistently observe these changes for useful earthquake forecast that would bring benefits to society. We analyzed ground gravity survey data obtained in 1998, 2000, 200... 相似文献
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Piyoosh Rautela Ramesh Chandra Lakhera 《International Journal of Applied Earth Observation and Geoinformation》2000,2(3-4)
The area around Sataun in the Sirmur district of Himachal Pradesh, India (falling between the rivers Giri and Tons; both tributaries of the Yamuna River) was studied for landslide vulnerability on behalf of the inhabitants. The study was made using extensive remote sensing data (satellite and airborne). It is well supported by field evidence, demographic and infrastructural details and aided by Geographic Information System (GIS) based techniques. Field observations testify that slope, aspect, geology, tectonic planes, drainage, and land use all influence landslides in the region. These parameters were taken into consideration using the statistical approach of landslide hazard zonation. Using the census data of 1991, vulnerability of the populace to the landslide hazard was accessed. As most of the infrastructure in the region is concentrated around population centres, population data alone was used for vulnerability studies. 相似文献
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GNSS系统及其技术的发展研究 总被引:3,自引:1,他引:2
阐述了国际上卫星导航系统的总体发展,对美、俄、欧、中的四大全球系统,以及相关的区域系统和增强系统进行了简单的介绍,研究分析了GNSS系统及其技术的发展趋势,同时分析了我国Compass全球系统面临的机遇和挑战,并提出了我国未来工作的建议. 相似文献
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“4D”技术及其应用 总被引:13,自引:0,他引:13
介绍“4D”(即数字地面模型、数字正射影像、数字栅格地图和数字线划地图)系列产品的生产流程、关键技术、及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。 相似文献
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《International Journal of Digital Earth》2013,6(1):66-87
Abstract Virtual Australia is not a well-defined or agreed concept. This discussion paper conceptualises Virtual Australia as a ‘virtual [digital] model containing and representing all non-trivial objects and their contextual environment – from blue sky to bedrock – in real world Australia’. It describes a scenario for Virtual Australia, one or two decades from now, in which the locations and conditions of non-trivial objects and their environment are updated automatically through a combination of remote sensing and wireless communication technologies in support of a ‘Supranet’. It then examines the concept of the ‘Supranet’ – a pervasive information network based largely on wireless technology linking the physical world to a virtual model in real time – and develops and discusses three principal characteristics of the Supranet: the ability to have or collect specific information (know); the ability to process information (think); and the ability to communicate that information. If, in the near future, any or all non-trivial devices are to some extent able to know, think and communicate, the potential for object autonomy will be realised. 相似文献
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Toward seamless indoor-outdoor applications: Developing stakeholder-oriented location-based services
Kohei OGAWA Edward VERBREE Sisi ZLATANOVA Naohiko KOHTAKE Yoshiaki OHKAMI 《地球空间信息科学学报》2011,14(2):109-118
Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders. 相似文献
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李志宽 《测绘与空间地理信息》2009,32(2)
3维技术以其直观、眩目的表现力深受人们喜爱.利用3S技术和Skyline开发平台,可以构建大型企业3维地理信息系统,以满足企业设计部门和资产管理部门对基础地理信息的需求.兼容原有2维系统的总图3维信息系统,将为企业的日常管理、设计施工、分析统计、规划决策等提供更加可靠、直观、多层次、多功能的综合服务信息. 相似文献