搜索结果: 31-45 共查到“理学 Gps”相关记录225条 . 查询时间(0.05 秒)
Geodetic deformations in the Central-Southern Apennines (Italy) from repeated GPS surveys
Geodesy GPS central-southern apennines strain rate seismotectonic
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2015/9/28
We computed the horizontal strain rate field for a sector of tbc Central-Southern Apennines (Italy) from GPS data collected during yearly repeated campaigns performed from 1994 to 2000 on tbc GeoModAp...
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
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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
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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
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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...
Geomagnetic storms and the occurrence of phase slips in the reception of GPS signals
s phase slips geomagnetic disturbances total electron content
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2015/9/25
We have investigated a dependence of the relative density of GPS phase slips on the geomagnetic disturbance level. The study is based on using Internet-available selected data from the global GPS netw...
Testing of the transionospheric radiochannel using data from the global GPS network
total electron content GPS transionospheric radiochannel geomagnetic disturbances space weather
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2015/9/17
Using the international ground-based network of two-frequency receivers of the GPS navigation system provides a
means of carrying out a global, continuous and fully-computerized monitoring of phase f...
Detection of meteorological inconsistencies by GPS
GPS double difference zenith totaldelay residuals
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2015/9/16
GPS observations, distances from satellites to receivers and meteorological conditions in neutral atmosphere are known to obey a constraint, which provides a residual or in other words a quality index...
Rupture history of the 1997 Umbria-Marche (Central Italy) main shocks from the inversion of GPS, DInSAR and near field strong motion data
slip history waveform inversion geodetic data modeling Colfiorito earthquakes kinematic source models
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2015/9/15
We investigate the rupture history of the three largest magnitude earthquakes of the 1997 Umbria-Marche sequence by inverting GPS, DInSAR and near-source strong motion waveforms. We use the frequency ...
Ionospheric biases correction for coordinates derived from GPS single point positioning
GNSS Global Positioning System singlepoint positioning
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2015/9/10
Most GPS users employ low cost receivers. These receivers do not allow users to record the pseudorange that
they observe, but the computed coordinates. This work presents an original and simple metho...
Geodetic deformation Across the Central Apennines from GPS Data in the time span 1999-2003
Geodetic Deformation Gps Apennines
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2015/9/10
Abstract During the time span 1999-2003 was set up and repeatedly surveyed a not permanent GPS network located across one of the highest seismic areas of the central Apennines (Italy). The Central Ape...
Data analysis of Permanent GPS networks in Italy and surrounding region:application of a distributed processing approach
Crustal deformations Satellite geodesy Data processing Plate boundaries, motion, and tectonics
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2015/9/8
We describe the procedures used to combine into a uniform velocity solution the observations of more than 80 continuous GPS stations operating in the central Mediterranean in the 1998-2004 time interv...
GPS measurement of active strains across the Apennines
GPS measurement active strains Apennines
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2015/9/7
Geodetic data are providing a new prospective in studying active tectonic processes that are occurring in penin- sular Italy. In this paper we use a recently published GPS velocity solution, obtained ...
MIVIS image geocoding experience on merging position attitude system data and public domain GPS stream (ASI-GeoDAF)
MIVIS geocoding geometric correction GPS
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2015/9/7
The use of airborne scanners involves geo-referencing problems, which are difficult because of the need to know the exact platform position and attitude for each scan line. The errors of the onboard n...
Kinematic GPS survey as validation of LIDAR strips accuracy
LIDAR GPS DTM landslide body Sarno
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2015/9/7
As a result of the catastrophic hydrogeological events which occurred in May 1998 in Campania, in the south of Italy, the distinctive features of airborne laser scanning mounted on a helicopter were u...
Atmospheric anomalies over Mt.Etna using GPS signal delays and tomography of radio wave velocities
GPS atmospheric anomalies tropospheric delays tomography of radio wave velocities
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2015/9/2
Due to the prominent topography of Mt. Etna, the use of satellite geodetic techniques may significantly suffer from atmospheric heterogeneities. This problem mainly affects the DInSAR technique. To ov...