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1.
将GPS数据处理科研软件和商业软件进行了简要对比分析,着重从GPS基线解算和网平差两方面,讨论几种常用GPS静态数据处理软件在功能、基线解算和数据处理结果方面的差异,为使用不同GPS软件进行数据处理提供有益的参考。  相似文献   

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从1991年至1997年,我国先后完成了全国GPS一、二级网的布测,该网覆盖了整个中国大陆,通过该网的平差,建立了我国高精度的GPS参考框架,在全国GPS网平差中,我们专门设计了一种新的相关GPS基线向量抗差估计方案,并应用了方差分量估计方法,结果表明,应用该抗差估计和方差分量估计方法,测站点坐标估计值的内外符合精度有了较大提高,基于相同的数学模型和平差方案,由两个不同的部门,独立开发了两套软件系统:“GPS平差之星2000”和“VECADJ”,并进行了相互比对,在自由网平差中,两套软件解算的所有坐标分量最大差值为1毫米;引入某些GIS站固定基准后,其坐标分量最大差值为6毫米。最终点的均方误差大约为8.6厘米,所有GPS点位的均方误差均值约为1.2厘米。  相似文献   

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从GPS基线解算和网平差两方面,讨论几种常用GPS静态数据处理软件在功能、误差改正模型和数据处理结果方面的差异,为使用不同GPS软件进行数据处理提供有益的参考.  相似文献   

4.
阐述了国产GPS仪器软件的特点,介绍在国外开展测绘工作常遇到的情况,并针对这些情况,摸索总结出适用于国外测绘项目的GPS的作业方案。结合在国外测绘的一个的案例,对GPS作业方案及成果进行了可靠性分析,并验证GPS成果的可靠性。  相似文献   

5.
简要说明了地铁GPS控制测量的重要性及GPS网形的优化设计问题,介绍了LGO结合科傻平差软件解算GPS的基本方法,讨论了GPS控制网复测较差限差取值问题。根据实际经验,总结了针对常见问题的相应解决办法。  相似文献   

6.
GPS技术在柴阿润水电站工程中的应用   总被引:1,自引:0,他引:1  
介绍了GPS技术在柬埔寨王国柴阿润水电站工程中的应用,设计了首级GPS D级控制网,实现了GPS技术在国外水电工程中的高效运用,解决了柬方的工程实践问题.  相似文献   

7.
概述了精密单点定位与双差GPS定位的基本原理,采用了Bernese软件中精密单点定位模块与GAMIT软件动态定位模块,处理了加州地震与汶川地震的数据,实现了精密单点定位及双差定位实时监测地震变化。  相似文献   

8.
范士杰  刘焱雄  张健 《测绘科学》2013,38(2):184-186
本文基于非差精密单点定位(PPP)和双差定位模式,采用研制的UNIP软件和GAMIT/TRACK运动学分析模块,对GPS技术在地震监测中的应用进行研究。利用IGS不同精度和时延的星历和钟差产品,分析了卫星轨道和钟差对两种软件动态定位结果的影响;采用不同的数据处理方案,分别提取GPS同震地表形变信息。结果表明:GAMIT/TRACK模块精密动态定位的实时性,更适用于地震等突发事件中的GPS快速响应;如果能够提供精确的卫星钟差,UNIP软件的高程精度明显优于GAMIT/TRACK模块,技术将更显优势。  相似文献   

9.
在TGO中实现以三维坐标分量方式统计环闭合差   总被引:1,自引:0,他引:1  
我国GPS规范对环闭合差的检核方法是对三维坐标分量分别检验,而美国Trimble Geomatics Office(TGO)软件对环闭合差的检核方法是对水平分量和垂直分量进行检验,如何以三维坐标分量方式统计环闭合差是应用TGO软件执行国家规范的重要问题,本文就这一问题进行了探讨。  相似文献   

10.
探讨了中海达HGO数据处理软件在GPS工程测量控制网数据处理中的应用效能,以某水库输水管线测图GPS控制网为例,对软件GPS高程拟合及其高程中误差评定方法进行了深入分析和研究,总结了一些有益的经验,希望对工程技术人员了解软件性能和选用合适高程拟合模型进行平差计算提供参考和借鉴。  相似文献   

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Rameswaram Island located on the southeast coast of India bounded by Gulf of Mannar (GoM) on the south and Palk Bay (PB) on the north, respectively, is unique in nature. The southeastern part of Rameswaram Island known as Dhanushkodi foreland is a long sand spit of about 20?km length. Shoreline erosion/accretion rates are computed based on End-Point Rate, Linear Regression Rate and Net Shoreline Change from Indian Remote sensing Satellite, Linear Imaging Self scanning Sensor III images from 1998 to 2012. Along the PB coast of Dhanushkodi foreland, eroding shorelines are dominant except Arichamunai, whereas it is reversing along GoM. Inter-annual shoreline change revealed that changing trend and stability of Island are affirmed with statistical approaches. An equilibrium shoreline trend is noticed on both the sides of Dhanushkodi foreland. Annual shoreline change rate indicates erosion and accretion in northern and southern coastline of Dhanushkodi foreland varies, respectively.  相似文献   

14.
“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   

15.
我国地图学的过去、现在与未来   总被引:1,自引:0,他引:1  
作者从事地图学教育与科研40余年,本文对我国地图学作了回顾和若干思考,简要地阐述了地图学的历史发展和主要特点以及现代地图学的成就,最后提出地图学未来发展的几个重要问题。  相似文献   

16.
Rhind (1992) argued that government data policies and Intellectual Property Righr (IPR) considerations would play an increasingly large role in influencing the use of GIS. This has proved to be correct in general but the non-technical factors affecting data collection, supply, and price have become ever more complex. Indeed, one characteristic of the present situation is that it is now impossible to consider the legal, economic, and public policy issues in isolation. Consequently, this paper sets out to identify the interactions between them and the areas of conflict. It draws upon the literature of a much wider area than traditional GIS. This approach is essential because of two factors. The first is that GIS databases are presently of modest commercial value compared to some other data and hence key decisions on IPR, etc are being made outside our discipline. The second is that the nature of GIS databases is mutating rapidly through the wider use of multi-media and of the internet. It is concluded that the future is largely unpredictable in any detail since the interactions differ in different countries and at different moments in time. In many cases, however, revenue generation from sales or leasing of data or from services built upon data exploitation is likely to be a characteristic of both the public and the private sectors. Such charging has observable beneficial effects to set against the frequently claimed disadvantages, whether measured in financial, legal, or public access terms.  相似文献   

17.
Visual interpretation of LANDSAT imagery in bands 6 and 7 covering Panna district, Bundelkhand, Madhya Pradesh was carried out for terrain analysis and present land use. The physiographic units viz. hills and hill ranges, escarpments, ridges, table-land, pediment, piedmont plain and sub-units of second order were identified and delineated using inter pretation elements. Area of each unit and sub-unit is calculated and presented in the table showing extent, tone, texture, shape and land use. Land use in relation to physiographic units is also described in the paper and shown in the form of small scale map. Visual interpretation technique helps in broad terrain analysis on scale 1:1 million. This information could be used for making a rapid resource inventory.  相似文献   

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山水林田湖生命共同体生态保护和修复   总被引:3,自引:0,他引:3  
中共中央、国务院颁布的《生态文明体制改革总体方案》提出了六大生态文明理念,其中之一就是“山水林田湖是一个生命共同体”理念.论文以系统科学和景观生态学为理论基础,探讨了“山水林田湖生命共同体”生态保护和修复的指导思想、目标、方法、技术和制度. “山水林田湖生命共同体”实质是土地/景观综合体, “山水林田湖是一个生命共同体”理念提出了两个指导思想—系统观和生命观;目标—提高以“命脉”为核心的生态景观服务功能;方法—景观方法和绿色基础设施建设;工程技术—生态景观化工程技术;制度—以土地使用者为主体的综合景观管理.  相似文献   

20.
Parameters of common relevance of astronomy,geodesy, and geodynamics   总被引:1,自引:1,他引:1  
  相似文献   

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