搜索结果: 46-60 共查到“理学 Gps”相关记录225条 . 查询时间(0.054 秒)
The coseismic ground deformations of the 1997 Umbria-Marche earthquakes:a lesson for the development of new GPS networks
GPS IGM95 Umbria-Marche earthquakes
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2015/9/1
After the occurrence of the two main shocks Mw=5.7 (00.33 GMT) and Mw=6.0 (09:40 GMT) on September 26, 1997, which caused severe damages and ground cracks in a wide area of the Umbria Marche region, t...
Reduction in the ionospheric error for a single-frequency GPS timing solution using tomography
GPS ionosphere tomography timing single-frequency
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2015/8/28
Single-frequency Global Positioning System (GPS) receivers do not accurately compensate for the ionospheric delay imposed upon a GPS signal. They rely upon models to compensate for the ionosphere. Thi...
Non-permanent GPS data for regional-scale kinematics: reliable deformation rate before the 6 April, 2009, earthquake in the L'Aquila area
GPS Non-permanent station Subsampling Velocity Strain field
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2015/8/28
A GPS-based geodetic study at a regional scale requires the availability of a dense network that is characterized by 10 km to 30 km spacing, typically followed in a few continuous GPS stations (CGPSs)...
Simulation of ionospheric error on GPS signals due to changes in the direction of mobile station positions in differential GPS
Ionosphere Ray-tracing dGPS Baseline
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2015/8/27
Ionospheric propagation delay is one of the major sources of error in global positioning system (GPS) precision. Therefore, accurate estimation of the ionospheric delay is required to correct GPS posi...
Using publicly available GPS solutions for fast estimations of first-order source details from coseismic deformations
GPS Coseismic deformations Source inversion Maule earthquake
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2015/8/27
We here explore the potential use of publicly available GPS solutions to obtain first-order constraints on a source model immediately following an earthquake, within the limits of GPS solution timelin...
GPS observations of coseismic deformation following the May 20 and 29,2012,Emilia seismic events (northern Italy):data,analysis and preliminary models
GPS Coseismic deformation Emilia sequence
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2015/8/26
In May-July 2012, a seismic sequence struck a broad area of the Po Plain Region in northern Italy. The sequence included two Ml >5.5 mainshocks. The first one (Ml 5.9) occurred near the city of Finale...
High-rate (1 Hz to 20 Hz) GPS coseismic dynamic displacements carried out during the Emilia 2012 seismic sequence
HRGPS GPS data processing Strong motion
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2015/8/26
In May-July 2012, Emilia Romagna (northern Italy) was struck by a significant seismic sequence, which was characterized by two moderate-magnitude earthquakes: a Ml 5.9 event on May 20, 2012, at 02:03:...
The 2009 L’Aquila earthquake coseismic rupture: open issues and new insights from 3D finite element inversion of GPS, InSAR and strong motion data
GPS open issues and new insights
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2015/8/17
We present a Finite Element inverse analysis of the static deformation
field for the Mw= 6.3, 2009 L’Aquila earthquake, in order to infer the rupture
slip distribution on the fault plane. An univoca...
The 2009 L’Aquila earthquake coseismic rupture: open issues and new insights from 3D finite element inversion of GPS, InSAR and strong motion data
Numerical approximations and analysis Seismicity and tectonics Dynamics and mechanics of faulting Europe
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2015/8/14
We present a Finite Element inverse analysis of the static deformation field for the Mw= 6.3, 2009 L’Aquila earthquake, in order to infer the rupture slip distribution on the fault plane. An univocal ...
Strain patterns along the Kaparelli–Asopos rift (central Greece) from campaign GPS data
GPS Strain Kaparelli Central Greece
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2015/8/14
We present results from four GPS campaigns in the broader Kaparelli–Asopos area in central Greece. This area is undergoing extension as demonstrated by seismological, geodetic and geological data. The...
GPS tomography tests for DInSAR applications on Mt. Etna
Volcano monitoring Satellite geodesy GPS Tomography Etna SAR DInSAR Refractivity Delay
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2015/8/14
Tropospheric artifacts of SAR images in a volcanic area like Mt. Etna cause ambiguity in the interpretation of deformations with such technique. It would be useful to measure the delay caused by tropo...
Earthquake and Tsunami Potential of the Hikurangi Subduction Thrust, New Zealand: Insights from Paleoseismology, GPS, and Tsunami Modeling
Hikurangi Subduction Thrust GPS
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2015/7/17
The Hikurangi subduction margin, where the Pacific Plate subducts beneath the North Island of New Zealand, poses a major seismic and tsunami hazard to the New Zealand region, but its seismic and tsuna...
基于不确定融合的GPS/INS 组合导航滤波算法
多信源不确定融合 扩展卡尔曼滤波 等效测量值 GPS/IMU
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2015/7/16
针对实际车载组合导航系统测量中不确定噪声的问题, 提出一种基于不确定融合估计的GPS/INS 组合导航滤波算法, 建立了导航系统的状态方程和观测方程; 通过多信源不确定融合估计, 得到多传感器的等效测量值以及误差方差阵; 对系统方程进行滤波处理, 得到车辆的准确位置. 车载系统的实测数据表明, 不确定噪声下的融合估计结果优于独立白噪声假设下的融合估计, 并验证了所提出算法的有效性和实用性.
GPS观测结果反映的尼泊尔Mw7.8地震孕震特征
GPS应变率场 同震位移场
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2015/6/4
针对2015年4月25日尼泊尔Mw7.8地震的孕震特征,本文首先对覆盖尼泊尔及周边地区的5套GPS水平速度场结果进行了融合,得到了近似统一参考框架下的速度场结果;在此基础上通过对此次地震震源区及周边地区的速度场、应变率场、基线时间序列分析,识别了震前变形特征.GPS应变率场结果显示,喜马拉雅主边界断裂存在大范围挤压应变积累,震源区处于近南北向应变积累高值过渡区.跨喜马拉雅构造带的GPS基线时间序列...
基于GPS速度场变化结果研究汶川地震前后南北地震带地壳运动动态特征
速度场差值变化 汶川地震 最小二乘配置
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2015/6/4
本文针对制约多期GPS速度场动态演化特征分析的关键问题,提出速度场稳定基准选取中顾及基准偏移的影响,给出了改进拟准检定(QUAD)初选指标的方法,有效解决多期速度场的基准偏移对粗差剔除的影响.并在此基础上通过对1999—2013年南北地震带地区多期GPS速度场做以华南地块为统一参考基准的处理、最小二乘配置统一协方差参数估算,获取了南北带地区多期GPS速度场的网格化结果.结果显示: (1) 汶川地震...