搜索结果: 1-15 共查到“空间物理学 GPS”相关记录26条 . 查询时间(0.104 秒)
GPS 16参数广播星历改进参数的变化规律分析
GPS 广播星历 最小二乘 周期性
2018/5/4
在2004年发布的GPS界面接口控制文档中提出一种对GPS 16参数广播星历进行改进的GPS 18参数广播星历.本文介绍了GPS 16参数广播星历的拟合算法,对两类GPS广播星历参数进行比较,分析了改进参数的变化规律及特性.计算结果表明,GPS 16参数广播星历的改进参数具有明显的约12h和13.5d的周期变化特性,新提出的GPS 18参数广播星历能够更好地逼近GPS卫星真实轨道.
OPEN-SOURCE DIGITAL ELEVATION MODEL (DEMs) EVALUATION WITH GPS AND LiDAR DATA
Digital Elevation Model inundation mapping vertical accuracy LiDAR scale factor coastal inundation risk assessment
2016/10/14
Advanced Spaceborne Thermal Emission and Reflection Radiometer-Global Digital Elevation Model (ASTER GDEM), Shuttle Radar Topography Mission (SRTM), and Global Multi-resolution Terrain Elevation Data ...
EFFECT OF THE X5.4 CLASS SOLAR FLARE EVENT OF SOLAR CYCLE 24 ON THE GPS SIGNAL RECEPTION IN PENINSULAR MALAYSIA
Solar Flare GPS MyRTKnet Total Electron Content Ionospheric Delay
2016/10/14
In this paper, we examine the effect of solar flare event on the Global Positioning System (GPS) signal reception in Peninsular Malaysia during the X5.4 class solar flare on 7th March 2012, 00:24 UT a...
ESTIMATION OF CO- AND POSTSEISMIC DEFORMATION AFTER THE Mw 8.6 NIAS-SEMEULUE AND Mw 8.5 BENGKULU EARTHQUAKES FROM CONTINUOUS GPS DATA
GPS earthquake postseismic deformation
2016/10/14
The Mw 8.5 Bengkulu earthquake of 30 September 2007 and the Mw8.6 28 March 2005 are considered amongst large earthquake ever recorded in Southeast Asia. The impact into tectonic deformation was record...
PRELIMINARY ESTIMATION OF POSTSEISMIC DEFORMATION PARAMETERS FROM CONTINUOUS GPS DATA IN KOREA PENINSULA AND IEODO AFTER THE 2011 TOHOKU-OKI MW9.0 EARTHQUAKE
Korea Peninsular Tohoku-Oki earthquake postseismic deformation
2016/10/14
This paper describes utilization of GPS data in Korea Peninsula and IEODO ocean research station for investigation of postseismic deformation characteristic after the 2011 Tohoku-oki Mw9.0 Earthquake....
ON-LINE INTEGRATION OF GIS AND GPS FOR AUTOMATIC AND INTELLIGENT UPDATING OF SPATIAL DATA
Automatic GPS GIS Integrated Systems Rule-based system spatial data Updating
2015/9/28
One of the most expensive stages in implementation of a GIS system is preparation of spatial data to be entered to the system. It can be said that about 60-80 percent of the project cost is spent for ...
The response of the ionosphere to faint and bright solar flares as deduced from global GPS network data
ionopshere Total Electron Content
2015/9/25
Results derived from analysing the ionosphere response to faint and bright solar flares are presented. The analysis used technology of a global detection of ionospheric effects from solar flares as de...
GPS detection of the instantaneous response of the global ionosphere to strong magnetic storms with sudden commencement
Magnetic field strenght ionospheric disturbances
2015/9/25
Using a new technology for global GPS detection of ionospheric disturbances, GLOBDET, it has been established that a drastic increase in the time derivative of the magnetic field strength during magne...
基于高阶电离层延迟改正模型,确定了不同阶次电离层延迟对双频GPS载波信号的影响量,并根据国际地球自转与参考系统服务(international earth rotation and reference systems service,IERS)协议2010推荐的最新模型,对全球均匀分布的109个国际GNSS服务(international GNSS service,IGS)跟踪站1999~2003...
国际首台兼容北斗和GPS掩星探测仪获成功(图)
北斗 GPS掩星 探测仪 空间环境探测
2013/10/11
FY-3C星于北京时间2013年9月23日发射成功,9月29日21时48分,由中科院国家空间科学中心承研的GNOS掩星探测仪正式开机。开机2.5分钟,实现国际首次利用北斗二代信号的星载高动态定位;开机5分钟,成功接收首次GPS掩星事件;开机12分钟,成功接收北斗掩星事件,这是国际上首次接收到的北斗掩星信号。此外,GNOS掩星探测仪还同时实现了国内首次星载GPS L2C信号的接收,探测能力达到了国际...
本文利用两颗跟飞的GRACE卫星载GPS信标测量数据和基于差分相对TEC的层析算法,实现了全球范围的顶部电离层和等离子体层(450~5000 km) 层析成像.反演结果表明,利用低轨道卫星载GPS信标测量数据可以有效地重建顶部电离层和等离子体层的全球二维分布图像.对不同地磁活动条件下的天基层析反演结果表明,等离子体层电子密度随纬度的分布是不均匀的;在低纬赤道带,从顶部电离层向上延伸直到等离子体层,...
在大气多路径传播条件下,讨论了两种无线电信号的反演方法:几何光学方法和后向传播方法.当大气存在多路径效应时,采用几何光学方法反演大气参数会引入较大误差.后向传播方法将无线电信号从多路径区域反推至单路径区域,减少了大气多路径效应的影响.为了比较不同的反演方法,利用多相位屏模型,数值模拟了大气多路径条件下无线电信号在大气中的传播过程.假设信号处于理想条件下(仅受大气多路径效应的影响),分别用几何光学方...
应用Bjerhammar方法确定GPS重力似大地水准面
GPS重力边值问题 Bierhammer方法 似大地水准面 精度分析
2011/11/23
GPS技术的发展提出了新的大地边值问题——GPS重力边值问题.本文将Bjerhammar方法应用于GPS重力问题的求解,并在给出理论公式的基础上,针对实际计算中虚拟场元的分布和求解、虚拟球半径的确定及奇异积分等问题提出了具体的解决方案.文中通过比例因子k在虚拟球半径和GPS重力数据密度间建立起联系,并推导出其近似值.在此基础上,利用收集到的某地区的4870个GPS重力数据计算了该地区的似大地水准面...
针对GPS流动站与参考站采用不同采样率的特殊应用情况,本文提出如下处理方案:当观测数据不同步时,采用历元间相位差分计算流动站高精度“伪距”进而单独进行导航定位解算;当流动站与参考站观测数据同步时,采用双差模式。根据同步时计算结果的差异,对不同步计算结果进行系统误差修正。新方案不但充分利用了观测数据,而且可以节省数据采集和传输及运算的成本。飞机导航实验的数据解算表明,采用这种方法,流动站的定位精度可...