A reliability of site movement assessments determined from GPS data monitored during eight two-da... more A reliability of site movement assessments determined from GPS data monitored during eight two-day epoch measurements on the regional geodynamic EAST SUDETEN network (the Bohemian Massif, Central Europe) is discussed in details. Statistical tests of site positions processed by the BERNESE GPS software, their linear approximations for site movement velocity assessments and an establishment of probabilistic thresholds for reliability of the GPS data for regional geodynamic studies are delivered. The thresholds define necessary observation periods for annual epoch measurements performed on the networks with aim to obtain reliable movement estimates for geodynamic studies.
Thanks to the increasing number of permanent sites and the longer time series available (since Ja... more Thanks to the increasing number of permanent sites and the longer time series available (since January 1996) the EUREF Permanent Network (EPN) has become a valuable tool for the determination of present-day kinematics within Europe and its adjacent plates. ...
In July 2003 the International Association of Geodesy (IAG) established the Global Geodetic Obser... more In July 2003 the International Association of Geodesy (IAG) established the Global Geodetic Observing System (GGOS). The GGOS is integrating the three basic components: geometry, the earth rotation and gravity. The backbone of this integration is the existing global ground network, based on the geodetic space techniques: very long baseline interferometry, satellite laser ranging, global navigation satellite systems and Doppler orbitography and radiopositioning integrated by satellite. These techniques have to operate as one global entity and in one global reference frame. The global reference frame in the GGOS is a realization of the International Terrestrial Reference System (ITRS). The ITRS is a world spatial reference system co-rotating with the Earth in its diurnal motion in the space. The IAG Subcommision for the European Reference Frame (EUREF) in 1991 recommended that the terrestrial reference system for Europe should be coincident with ITRS at the epoch t 0 = 1989.0 and fixed to the stable part of the Eurasian Plate. It was named the European Terrestrial Reference System 89 (ETRS89). On the 2nd of June 2008, the Head Office of Geodesy and Cartography in Poland commenced operating the ASG-EUPOS multifunctional precise satellite positioning system. The ASG-EUPOS network defines the European Terrestrial Reference System ETRS89 in Poland. A close connection between the ASG-EUPOS stations and 15 out of 18 Polish EUREF permanent network stations controls the realization of the ETRS89 on Polish territory. This paper is a review of the global ITRS, as well as a regional and a national geodetic reference systems ETRS89.
The mesoscale NWP models produce very fine meteorological forecast over large areas, but it may f... more The mesoscale NWP models produce very fine meteorological forecast over large areas, but it may fail to reproduce the weather on the smaller scale. On the other hand, local meteorological parameters even measured at various elevations, are not sufficient for deriving the vertical troposphere structure. The paper addresses the problem of calibrating the mesoscale NWP model to suite local atmospheric measurements. The key issue is to obtain the spatial and temporal distribution of pressure, temperature and humidity. Methodology to interpolate, compare and subtract bias for both data sets is presented, as well as final atmospheric structure. Local data sets constitutes of 13 meteorological stations measuring three basic parameters with one hour time resolution. The average distance between sites is 20km. The Coupled Ocean Atmospheric Mesoscale Prediction System (COAMPS) model (Hodur, 1997) is the source of same three variables on the 3D grid, which has horizontal resolution of 1.44 km, with the 30 horizontal levels, and spans over 40 thousands square kilometers. Data are delivered with one hour time step. Study area is located in the south west of Poland in the Karkonosze mountains. The obtained data will be used for validating the GNSS tomography results from dense local network. Hodur, R.M., The Naval Research Laboratory's Coupled Ocean/Atmospheric Mesoscale Prediction System, Monthly Weather Review, 135, 1414-1430, 1997
The EUREF Permanent Network (EPN) consist of 200 stations, almost 40 % of these stations have met... more The EUREF Permanent Network (EPN) consist of 200 stations, almost 40 % of these stations have meteorological equipment. The observations obtained from meteorological packages could be used to estimate the tropospheric delay. The fluctuations in meteorological parameters cause fast changes of the tropospheric delay, as a correlated value, and in consequence difficulties in GPS heights determination. The meteorological parameters from meteorological equipment on the EPN stations and the additional reference data from World Meteorological Organization were two in situ data sources. The values from WMO server consist of the daily mean value of the most important weather characteristics. Among these data also appears: the pressure, the temperature and the humidity. These data and values obtained from Global Pressure and Temperature (GPT) model were used as basis for the meteorological data verification on EPN/IGS stations. The accuracy and the reliability of the meteorological data sets ...
GNSS meteorology is the remote sensing of the atmosphere (particularly troposphere) using Global ... more GNSS meteorology is the remote sensing of the atmosphere (particularly troposphere) using Global Navigation Satellite Systems (GNSS) to deliver information about its state. The two currently available navigation satellite systems are the Global Positioning System (GPS) and the GLObal’naya NAvigatsionnaya Sputnikovaya Sistema (GLONASS) maintained by the United States and Russia, respectively. The Galileo navigation satellite system, which is under supervision of the European Space Agency (ESA), is expected to be completed within the time frame of few years. Continuous observations from GNSS receivers provide an excellent tool for studying the earths atmosphere. The GNSS meteorology has reached a point, where there is a need to improve methods not only to compute Integrated Water Vapor over the GNSS receiver, but also to investigate the water vapor distribution in space and time (4DWVD). Since 2008, the new national permanent GNSS network ASG-EUPOS (98 stations) has been established i...
A reliability of site movement assessments determined from GPS data monitored during eight two-da... more A reliability of site movement assessments determined from GPS data monitored during eight two-day epoch measurements on the regional geodynamic EAST SUDETEN network (the Bohemian Massif, Central Europe) is discussed in details. Statistical tests of site positions processed by the BERNESE GPS software, their linear approximations for site movement velocity assessments and an establishment of probabilistic thresholds for reliability of the GPS data for regional geodynamic studies are delivered. The thresholds define necessary observation periods for annual epoch measurements performed on the networks with aim to obtain reliable movement estimates for geodynamic studies.
Thanks to the increasing number of permanent sites and the longer time series available (since Ja... more Thanks to the increasing number of permanent sites and the longer time series available (since January 1996) the EUREF Permanent Network (EPN) has become a valuable tool for the determination of present-day kinematics within Europe and its adjacent plates. ...
In July 2003 the International Association of Geodesy (IAG) established the Global Geodetic Obser... more In July 2003 the International Association of Geodesy (IAG) established the Global Geodetic Observing System (GGOS). The GGOS is integrating the three basic components: geometry, the earth rotation and gravity. The backbone of this integration is the existing global ground network, based on the geodetic space techniques: very long baseline interferometry, satellite laser ranging, global navigation satellite systems and Doppler orbitography and radiopositioning integrated by satellite. These techniques have to operate as one global entity and in one global reference frame. The global reference frame in the GGOS is a realization of the International Terrestrial Reference System (ITRS). The ITRS is a world spatial reference system co-rotating with the Earth in its diurnal motion in the space. The IAG Subcommision for the European Reference Frame (EUREF) in 1991 recommended that the terrestrial reference system for Europe should be coincident with ITRS at the epoch t 0 = 1989.0 and fixed to the stable part of the Eurasian Plate. It was named the European Terrestrial Reference System 89 (ETRS89). On the 2nd of June 2008, the Head Office of Geodesy and Cartography in Poland commenced operating the ASG-EUPOS multifunctional precise satellite positioning system. The ASG-EUPOS network defines the European Terrestrial Reference System ETRS89 in Poland. A close connection between the ASG-EUPOS stations and 15 out of 18 Polish EUREF permanent network stations controls the realization of the ETRS89 on Polish territory. This paper is a review of the global ITRS, as well as a regional and a national geodetic reference systems ETRS89.
The mesoscale NWP models produce very fine meteorological forecast over large areas, but it may f... more The mesoscale NWP models produce very fine meteorological forecast over large areas, but it may fail to reproduce the weather on the smaller scale. On the other hand, local meteorological parameters even measured at various elevations, are not sufficient for deriving the vertical troposphere structure. The paper addresses the problem of calibrating the mesoscale NWP model to suite local atmospheric measurements. The key issue is to obtain the spatial and temporal distribution of pressure, temperature and humidity. Methodology to interpolate, compare and subtract bias for both data sets is presented, as well as final atmospheric structure. Local data sets constitutes of 13 meteorological stations measuring three basic parameters with one hour time resolution. The average distance between sites is 20km. The Coupled Ocean Atmospheric Mesoscale Prediction System (COAMPS) model (Hodur, 1997) is the source of same three variables on the 3D grid, which has horizontal resolution of 1.44 km, with the 30 horizontal levels, and spans over 40 thousands square kilometers. Data are delivered with one hour time step. Study area is located in the south west of Poland in the Karkonosze mountains. The obtained data will be used for validating the GNSS tomography results from dense local network. Hodur, R.M., The Naval Research Laboratory's Coupled Ocean/Atmospheric Mesoscale Prediction System, Monthly Weather Review, 135, 1414-1430, 1997
The EUREF Permanent Network (EPN) consist of 200 stations, almost 40 % of these stations have met... more The EUREF Permanent Network (EPN) consist of 200 stations, almost 40 % of these stations have meteorological equipment. The observations obtained from meteorological packages could be used to estimate the tropospheric delay. The fluctuations in meteorological parameters cause fast changes of the tropospheric delay, as a correlated value, and in consequence difficulties in GPS heights determination. The meteorological parameters from meteorological equipment on the EPN stations and the additional reference data from World Meteorological Organization were two in situ data sources. The values from WMO server consist of the daily mean value of the most important weather characteristics. Among these data also appears: the pressure, the temperature and the humidity. These data and values obtained from Global Pressure and Temperature (GPT) model were used as basis for the meteorological data verification on EPN/IGS stations. The accuracy and the reliability of the meteorological data sets ...
GNSS meteorology is the remote sensing of the atmosphere (particularly troposphere) using Global ... more GNSS meteorology is the remote sensing of the atmosphere (particularly troposphere) using Global Navigation Satellite Systems (GNSS) to deliver information about its state. The two currently available navigation satellite systems are the Global Positioning System (GPS) and the GLObal’naya NAvigatsionnaya Sputnikovaya Sistema (GLONASS) maintained by the United States and Russia, respectively. The Galileo navigation satellite system, which is under supervision of the European Space Agency (ESA), is expected to be completed within the time frame of few years. Continuous observations from GNSS receivers provide an excellent tool for studying the earths atmosphere. The GNSS meteorology has reached a point, where there is a need to improve methods not only to compute Integrated Water Vapor over the GNSS receiver, but also to investigate the water vapor distribution in space and time (4DWVD). Since 2008, the new national permanent GNSS network ASG-EUPOS (98 stations) has been established i...
Uploads
Papers by Jaroslaw Bosy