http://www.sciencedirect.com/science/article/pii/S1674987110000356   总被引：1，自引：1，他引：0  

P. Mahesh  Bhaskar Kundu  J.K. Catherine  V.K. Gahalaut 《地学前缘(英文版)》2011,2(1):17-22

We have analyzed the July 15,2009,Fiordland earthquake(M_w 7.8),which occurred in the southwestern part of the South Island of New Zealand.This thrust-related earthquake in the southern Fiordland subduction zone is the largest New Zealand earthquake in the past 80 years.We have constrained a rupture model for this earthquake using coseismic offsets derived from the continuous geodetic network(Global Positioning System) of the New Zealand Institute of Geological and Nuclear Sciences (GNS Science).Our anal...  相似文献   

ȫ�򵼺�����ϵͳ�Ľ�չ   总被引：16，自引：12，他引：4  

陈俊勇  党亚明  程鹏飞 《大地测量与地球动力学》2007,27(5):1-4

?????????????????(GNSS)???GPS??????????????GLONASS???????GALILEO?????????????;????????μ?????????????????????????????????·??Ч??????????????????????????λ?????仯????????λ??????????????????λ????????;??????GPS???????λ(PPP)???????  相似文献   

利用精密单点定位（PPP）方法在黑龙江省进行1∶10000像片控制测量的精度分析     

季朝亮  齐中华  张力仁  李宗聚 《测绘与空间地理信息》2014,(10):234-236

通过对黑龙江省某测区利用GPS静态网和精密单点定位（PPP）两种方法对1∶10 000像片控制测量成果进行对比分析,在利用CQG2000对大地高进行高程异常改算精度同传统GPS网拟合高程进行对比分析。通过对比分析得出结论：精密单点定位（PPP）方法施测的像控点平面精度能够满足1∶10 000地形图更新、山区1∶10 000地形图测绘中±1 m的精度要求。同时也验证了＂我国大陆重力大地水准面CQG2000绝对精度在东经120°以东高于±0.3 m的可靠性。  相似文献   

Accuracy assessment of GPS navigation augmented by SAR and LiDAR-derived Digital Elevation Models     

《International Journal of Digital Earth》2013,6(12):1007-1022

Remotely sensed Digital Elevation Models (DEM) can be used to augment a standalone Global Positioning System (GPS) by adding an extra range observation which measures the distance to the Earth centre. This method so called height aiding can reduce the number of GPS satellites required to get a 3D position fix from four to three and hence improve the performance of the GPS navigation algorithm in terms of accuracy, reliability and availability. Up until now, the accuracy of height aided GPS navigation using higher resolution Synthetic Aperture Radar (SAR) and Light Detection and Ranging (LiDAR)-derived elevation data has not been fully evaluated in a broad spectrum of navigation scenarios. This article provides a robust and accurate analysis on how much range error is introduced by height aiding using 5 m spacing SAR and 1 m spacing LiDAR-derived DEMs under in-car and personal navigation situations. Based on the experimental results obtained from both dynamic and static tests, suggestions have been made on what level of vertical and positional accuracy can be achieved as well as the related DEM quality issues for navigation purposes.  相似文献   

基于WiFi与GPS组合定位算法的无缝定位方法研究     

马燕  袁蔚林  陈秀万  许玉斌  孙华波 《地理与地理信息科学》2013,29(3)

无线局域网络(WLAN)是一种全新的无线信号传输平台,该文在总结目前无缝定位与导航技术的研究现状、分析存在的问题和发展趋势的基础上,提出了联合GPS和无线局域网络的组合定位方法,以实现室内外的无缝定位与导航.同时,在深入研究卫星导航定位和无线传感器网络定位原理与算法基础上,针对定位环境的不同,提出了无缝定位的解决方案、转换机制和切换策略,并以WiFi网与GPS组合定位算法为例,进行了详细分析和深入讨论,所用算法可以实现无GPS、少于4颗可用卫星以及GDOP值不满足定位情况下的定位,与单独WiFi网络定位算法相比,该算法可以提高定位精度.  相似文献   

һ�ָĽ��ĸ߲����������Ӳ���ⷽ��     

易重海  朱建军  陈永奇  戴吾蛟 《大地测量与地球动力学》2010,30(6):71-76

????????????????????????????????????????????????????÷??????????????GPS????????е???????????????λ??????IGS????????????????????????????ν???????????????????????????????????仯??????????????????????????????????仯????????????????????????仯?????????????????????????????仯?,??????????????????????????????ó???????????????????????????????????У??????????????????????????t????????????????????ж???????????????????????λ????????峱???????????????????????????÷???????δ?????????????????????????????????????????????????????  相似文献   

基于PPP技术的伪距多路径效应分析   总被引：1，自引：1，他引：0  

李玮  程鹏飞  秘金钟 《大地测量与地球动力学》2011,31(3):98-101

从3个方面研究了河北省CORS系统各参考站的伪距多路径效应:1)比较了不同截止高度角条件下（5°、15°和25°）的伪距多路径效应,分析了多路径效应与高度角之间的关系;2)以若干个受多路径影响较为严重的参考站为例,基于其多路径效应的天空分布图（skyplot）分析了不同方位、不同高度角卫星观测值的多路径大小,同时对相应测站环境进行考察,验证了多路径效应的环境影响因素;3)利用PPP技术分别处理了受多路径影响最强和最弱的两参考站：永清和安新站同一天的观测数据,考察了多路径效应对PPP位置估值的收敛时间和收敛稳定性的影响。  相似文献   

福州GPS接收机检定场的设计与实现          下载免费PDF全文

林蒙安 《山东国土资源》2013,29(8)

为确保测绘数据的准确可靠,依照相关规定要求,从福州地区地形实际出发,经实地踏勘设计了由13个点组成的福州GPS接收机检定场,由国测一大队负责埋石、观测、计算平差,检定场的设计合理,观测数据精度优良,完全合乎规范要求。通过福建省技术质量监督局认证和授权,认定为福建省社会公用标准。  相似文献   

GPSԤ���������Ӳ�ľ��ȼ��Ա�׼��λ�����Ӱ��     

王爱生  王飞 《大地测量与地球动力学》2012,32(6):76-80

????IGS???????????????1995??2010?????????????????????????????????λ?????????????????е??????????????????????????????SISRE??С??2 m??????????????(6??20)??10 ^-9 s???????λ????澫???1.0??7.0 m?????????2.5??27.0 m??  相似文献   

Sea Surface Determination Using Long-Range Kinematic GPS Positioning and Laser Airborne Depth Sounder Techniques     

Shaowei Han  Chris Rizos  Ralph Abbot 《Marine Geodesy》2013,36(3):195-203

Precise long-range kinematic GPS positioning requires the use of carrier phase measurements, the data processing of which suffers from the technical challenges of ambiguity resolution and cycle slip repair. In this paper, the combination of an ambiguity recovery technique and a linear bias correction method has been used to overcome such problems. An experiment was conducted to test the utility of this technique to determine aircraft height to high accuracy, over very long baselines (of the order of one thousand kilometres), in support of the Laser Airborne Depth Sounder (LADS). From a comparison of four independently derived trajectories, this airborne GPS kinematic positioning experiment has confirmed that the sea surface can be determined to centimetre accuracy. The sea surface profiles thus obtained can be used to correct the errors introduced by long period ocean swells.  相似文献