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1
Content available Utilization of the GPS observations, geoid and precise leveling in the realization height systen in Poland
Łyszkowicz A.
Reports on Geodesy
|
2008
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z. 2/85
49-59
2
Content available Geo-kinematics of Central Europe inferred from long-term monitored regional and local GPS networks
Hefty J.
Reports on Geodesy
|
2008
|
z. 2/85
9-18
3
Content available remote Work-Package 5 of the CERGOP-2/Environment: GPS data analysis and the definition of reference frames
Hefty J.
Reports on Geodesy
|
2006
|
z. 4/79
367-370
EN
Activities of WP 5 during the reported period were concentrated on regular analysis and gradual extension of network of permanent stations in Central Europe. Number of stations included in the network processed at Slovak University of Technology is increasing. Status in April 2005 was 43 stations, however some of them are not operating continuously. Analysed stations, which are producing data without significant interruptions, are plotted in Fig. 1. Additionally, analysis of two-year time series of station coordinates was started to obtain more detailed information about individual station behaviour from long-term and short-term point of view. The main purpose of WP 5 is definition and practical realization of geocentric reference frame suitable for three-dimensional geokinematical monitoring and strain analysis with millimetre precision in the region of Central Europe (Fejes and Pesec, 2003). The main attributes of processing are described in (Hefty, 2004 and Hefty et al., 2004).
4
Content available Study of the effects of processing strategy variations on GPS position estimates
Mulić M., Bilajbegović A., Altiner Y.
Reports on Geodesy
|
2006
|
z. 5/80
111--119
5
Content available remote Results of the CEGRN'03/BULREF'03 campaign
Vassileva K.
Reports on Geodesy
|
2006
|
z. 4/79
259-267
EN
Strategy, models, results and analysis of the processing of the GPS CEGRN'03/BULREP03 campaign was presented using Bernese Software, Version 4.2.
6
Content available remote Progress report of the workpackage WP10.6 "Geodynamics of Northern Carpathians" for the period from april 1, 2004 to march 31, 2005
Zablotskyj F.
Reports on Geodesy
|
2006
|
z. 4/79
233-234
EN
The following works and studies have been carried out for the period from April 1, 2004 to March 31, 2005 by the team of the Workpackage WP.10.6 within the program "Geodynamics of Northern Carpathians". The permanent SHAZ GPS station was created in the Shatsk town which is situated in the northwestern region of Ukraine.
7
Content available remote Kinematics of Central European GPS geodynamics reference network as the result of epoch campaigns during nine years
Hefty J.
Reports on Geodesy
|
2006
|
z. 4/79
349-358
EN
Central Europe Regional Geodynamic Project (CERGOP) realized in 1994-1997 and its follow-up CERGOP-2/Environment realized from 2003 is aimed to geodynamical investigation of the region of Central Europe. Within this project epoch GPS campaigns in annual or bi-annual intervals are performed. They are covering nine-years period of epoch repeated observations. The crucial products of analysis of epoch campaigns are site velocity estimates serving further as input data for geo-kinematical interpretations and strain rate analyses. In the paper are presented and analysed velocities for nearly 30 sites with 8-9 year observation history. Simultaneously are estimated velocities for sites with shorter (4-6 years) observing span. This new CERGOP velocity field comprising 53 sites of Central Europe geodynamic reference network (CEGRN) is compared with velocities derived from older CERGOP campaigns and with ITRF velocities.
8
Content available GPS velocity field of the Balkan Peninsula
Vassileva K., Becker M.
Reports on Geodesy
|
2006
|
z. 5/80
549--563
9
Content available GPS networks and GPS measurements in the Republic of Macedonia
Ribarovski R., Srbinoski Z., Jovanov J., Nasevski M., Bogdanovski Z.
Reports on Geodesy
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2006
|
z. 5/80
385--390
10
Content available remote Final report presented by partner UNIPD for the period 01 april 2003 - 31 july 2006
Caporali A., Facchinetti C., Bonafede L.
Reports on Geodesy
|
2006
|
z. 4/79
399-417
EN
Within the Project our group has been responsible ofWP6, which addresses the stability of time series of coordinates of GPS stations used in the project. In addition we have supported WP1, WP4, WP7 and WP10.1, as scheduled. The time series we have analysed result from WP1 and WP5. We have combined normal equations from the EUREF network, and selected those stations which are relevant to the CERGOP 2 project. Likewise for Italian and Austrian stations we have stacked normal equations pertaining the national networks, and obtained time series which are useful to the science part of the Project. Finally we have addressed the normal equations of the CEGRN campaigns, up to the CEGRN 03 campaign, constructed time series and checked for their continuity. An in depth analysis of the time series was done for those sites which have been active with continuity for at least three years. We did this analysis for all the stations which met this requisite, including time series of a number of stations computed by the Austrian partner OLG. The analysis consisted in the identification, in the time and frequency domains of specific signatures, typically annual and semi annual, affecting the time series and can be of various origin, such as seasonal water flow or thermal dilatation of the antenna mount. After removal of the periodic signals, the power spectral density has been computed and the white and coloured components in tte noise could be characterized. We report in most cases flicker phase noise at low frequencies and white noise at higher frequencies (>2 cycles/year), with a few exceptions in which the noise is white at all frequencies. A few stability problems are reported. In particular our own ASIA station was affected by mount instability in connection to a snow storm in February 2006. This event was promptly noticed from the analysis and the mount problem could be solved. We have checked for local instabilities by at deviations of the estimated velocities from the expected pattern. We have verified that the stations contributing to the project have velocities agreeing with theoretical predictions. When this does not happen, then the station in most cases has a marginal tracking history, and we suspect that the discrepancies are attributable to a weak data set, more than true instability. Tie contribution to the Project includes, besides the data analysis part, two new permanent stations which were installed in Asiago and Rovigo as part of the Project, aad regularly operated. Two doctoral stipendia have been awarded, and a Web page to our WP6 has been constructed, regularly maintained and linked to the Projects web page.
11
Content available remote Evaluations of six years GPS epoch campaign measurements in the Tatra Mountains
Mojzes M., Papco J., Czarnecki K., Walo J.
Reports on Geodesy
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2006
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z. 4/79
195-202
EN
The geodynamic investigation of the Tatra Mountains cmst movements is a local subproject of the CERGOP-2/Environment supported by the European Union. This contribution analyzes repeated epoch measurements performed in a special GPS network in order to investigate tectonic motions within the Tatra Mountains region. This GPS network was established in 1998 and consists of 11 sites, 7 in Slovak Republic and 4 in Poland. The size of the investigated area is approximately 40 km by 60 km with maximum relative height difference 1800 m between sites. Epoch measurements were performed annually from 1998 to 2003. Processing of all GPS campaigns was done using the Bernese software 4.2 with the standard procedure. All GPS campaigns were connecting to the nearest five IGS GPS permanent stations. For determination of the velocity vectors two models were used.
12
Content available remote CERGOP II semi-annual progress report by Italian Space Agency for the period october 2004 - march 2005
Vespe F., Marzo C., Pacione R., Rutigliano P., Ferraro L.
Reports on Geodesy
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2006
|
z. 4/79
381-398
EN
In the framework of CERGOP II ASI is involved in the following workpackages: WP.l. Internet based seamless database for environmental studies; WP.3. Periodic determination of the reference frame CEGRN; WP.5. GPS data analysis and the definition of reference frames ; WP.6. Analysis of the long-term coordinate time series; WP.8. Impact of atmospheric effects on GPS height determination; WP.9. GPS based rapid service for meteorology and hazard assessment. This is a report which describes the activities carried out on CERGOP-H Project for the period October 2004 - March 2005. Most part of the report it's devoted to summarize the follow-on of the activities described in the previous report: the study of ongoing deformations in the Alpine-Eastern area, investigate by means of strain rate analysis, the Near Real Time ZTD products, estimates on a subset of 26 European stations and compared with respect to EUREF tropospheric estimates, the results obtained by the analysis of GPS data collected by a small regional network completely devoted to meteorology, and the analysis of displacement of large landslides areas monitored by GPS. Moreover the first results of an additional activity, an interferometer investigation on landslides motion, are reported.
13
Content available Analysis of the position of the stations from the GPS network of the Balkan Peninsula
Valev G., Vassileva K., Milev G.
Reports on Geodesy
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2006
|
z. 5/80
565--573
14
Content available remote Some experiences in RTK and DGPS mesurements using INTERNET and GSM mobile-phone
Rogowski J. B., Kujawa L., Leszczyński M., Rogowski A.
Reports on Geodesy
|
2004
|
nr 2/69
243--252
EN
The practical need for GNSS positioning in real time led to the development of a medium for data transmission. The experience in RTK and DGPS measurements using data transmissions by the INTERNET and GSM/GPRS radio link are presented in this paper.
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