搜索结果: 31-45 共查到“地球物理学 Gps”相关记录144条 . 查询时间(0.078 秒)
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...
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...
Reprocessed height time series for GPS stations
Global positioning system GPS data processing algorithm model vertical speed
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2015/1/5
Precise weekly positions of 403 Global Positioning System (GPS) stations located worldwide are obtained by reprocessing GPS data of these stations for the time span from 4 January 1998 until 29 Decemb...
基于拟准检定的实时单站GPS提取同震速度的改进算法研究
同震速度 高频GPS数据 实时单站GPS历元间差分
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2014/9/26
提出了一种基于拟准检定的实时单站GPS载波相位观测数据历元间差分提取同震速度的改进算法.改进算法将实时高频历元差分数据质量控制作为同震速度准确提取的重要保障，对原始高频数据中的小周跳和粗差十分敏感，且能够有效地估计小周跳和粗差，从而抵抗它们对同震速度估计的不良影响；另外，改进算法还简化了数据处理流程，也使得利用广播星历单站提取同震速度、监测地震形变的算法更为稳健.选取了2011年3月11日日本大地...
基于GPS和COSMIC数据分析汶川地震TEC和NmF2扰动
汶川地震 TEC NmF2 同震响应
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2014/9/26
使用相关方法和welch法计算功率谱密度研究汶川地震前后GPS TEC在时域和频域上的变化，并进一步分析NmF2空间分布变化.得出主要结论， 震前5月9日开始TEC平常具有良好的相关性被打破，24 h全日波、12 h半日波成分功率谱密度幅度值变化明显.5月12日至6月11日NmF2变化幅度明显增大.研究结果显示，TEC和NmF2时空分布变化存在电离层震前扰动和同震响应， 并且TEC震后的异常变化相...
Detection of Volcanic Plumes by GPS: the 23 November 2013 Episode on Mt. Etna
GPS SNR data Etna volcanic plume
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2015/8/18
The detection of volcanic plumes produced during explosive eruptions is important to improve our understanding on dispersal processes and reduce risks to aviation operations. The ability of Global Pos...