共查询到20条相似文献，搜索用时 234 毫秒
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福建省连续运行参考站网络的构建 总被引：1，自引：0，他引：1
CORS系统是构建网络RTK的基础,首先阐述了CORS的发展历史,介绍了网络RTK所采用的主要系统服务技术,对比了网络RTK相对于常规RTK具有鲜明的技术特点和诸多优势,对CORS系统的精度分析说明了CORS网络的单日解算精度完全可以满足一般的工程项目控制数据和矿区地面沉陷监测的精度要求,经过长期观测数据累计,CORS网络可以满足并应用于更高精度要求的测量项目。 相似文献
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针对当前广泛应用的Trimble CORS系统,通过分析CORS系统的工作流程,解析Trimble CORS系统报告数据存储格式,提出基于系统报告的CORS终端监控方法,采用C#开发了终端监控模块,并在湖州市CORS系统日常管理中得以运用。实践结果表明,该方法是一种便捷的CORS终端监控方法,可广泛应用在CORS站用户服务系统中。 相似文献
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CORS改变了传统测绘基于大地控制网的作业模式,以集中网络化的方式,为用户提供实时和事后的精密定位服务。根据我国法律法规要求,测绘活动必须在符合数据安全的前提下进行,因此,CORS提供各种服务的同时必须确保信息安全。本文以Trimble CORS系统为例,详细阐述了CORS系统的工作流程,介绍了基于FJCORS的安全服务技术研究内容,包括具有收发、转换参数自动计算、数据汇集与运行监控、用户管理等功能软件的研究开发,从而更好地满足CORS系统日常运行、维护与用户服务等相关需求。 相似文献
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简要介绍了单基站CORS定位技术原理以及CORS的基本算法和发布方式。比较了单基站CORS和常规RTK定位技术,体现了CORS系统的优势。着重介绍了使用单基站CORS放样的具体步骤,包括点位放样、直线放样和曲线放样。为今后工程提供参考。 相似文献
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首先介绍了单基站CORS系统的定位原理,其次从效率和精度的实际应用出发,在经济、实用的前提下构建一个单基站的CORS系统,并完成系统性能的测试。 相似文献
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介绍了CORS系统的组成,结合矿业权实地核查阐述了CORS系统的应用和使用方法,通过网络RTK技术与常规GPS的比较,分析了CORS系统的优点和不足。 相似文献
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范文元 《测绘与空间地理信息》2012,(6):96-98,102,107
介绍了CORS的基本原理及基本结构,通过实例分析了基于CORS系统的网络RTK技术在地籍测绘生产中的优势,研究了基于CORS系统的网络RTK定位精度的评定方法。结果表明,利用基于CORS系统的网络RTK技术进行测绘生产的方法科学、精度可靠。证明了基于CORS系统的网络RTK技术在测绘生产中具有广阔的应用前景。 相似文献
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文章基于CORS系统的应用特点,对网络CORS系统建设、结构组成的理论分析,提出了其在控制测量方面的技术设想,并通过实践和示范应用,最后形成了网络CORS平台应用于控制测量的具体方法,总结了其区别于传统的控制测量新特色。 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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Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data 总被引：5，自引：0，他引：5
C. Bhuiyan R.P. Singh F.N. Kogan 《International Journal of Applied Earth Observation and Geoinformation》2006,8(4):289-302
The hard-rock hilly Aravalli terrain of Rajasthan province of India suffers with frequent drought due to poor and delayed monsoon, abnormally high summer-temperature and insufficient water resources. In the present study, detailed analysis of meteorological and hydrological data of the Aravalli region has been carried out for the years 1984–2003. Standardised Precipitation Index (SPI) has been used to quantify the precipitation deficit. Standardised Water-Level Index (SWI) has been developed to assess ground-water recharge-deficit. Vegetative drought indices like Vegetation Condition Index (VCI) and Temperature Condition Index (TCI) and Vegetation Health Index (VHI) have been computed using NDVI values obtained from Global Vegetation Index (GVI) and thermal channel data of NOAA AVHRR satellite. Detailed analyses of spatial and temporal drought dynamics during monsoon and non-monsoon seasons have been carried out through drought index maps generated in Geographic Information Systems (GIS) environment. Analysis and interpretation of these maps reveal that negative SPI anomalies not always correspond to drought. In the Aravalli region, aquifer-stress shifts its position time to time, and in certain pockets it is more frequent. In comparison to hydrological stress, vegetative stress in the Aravalli region is found to be slower to begin but quicker to withdraw. 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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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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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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自动车辆定位导航系统中传感器的误差分析 总被引：1，自引：0，他引：1
对国界定位导航系统中几种常见的辅助传感器所产生的误差进行了分析，导出了不同传感器的误差模型。这些误差模型是估计车辆位置的扩展卡尔曼滤波器的基础，同时也为选择适当的传感器提供了理论根据。 相似文献