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EN
GPS permanent stations situated in Central Europe region are systematically analyzed in order to investigate behaviour of long-term monitoring of horizontal position and ellipsoidal height. On the basis of data from more than 30 sites the quality of the station is evaluated. Stability of station is measured by variety of parameters: jumps and discontinuities of known but also of unknown origin, seasonal variations amplitudes and phases and diurnal coordinate variations. We estimate for each network station its main deterministic characteristics including identification of eventual jumps, their time of occurrence and magnitude, annual variations and site velocities. The set of criteria for defining "stable" permanent station is proposed.
3
EN
In October 2000, the Faculty of Geodesy, University of Zagreb, with the support o German Federal Agency for Cartography and Geodesy (BKG) and Croatian State Geodetic Administration, established two permanent GPS-stations: one in Dubrovnik and another one in Osijek. The stations became the part of large global network International GPS Service for Geodynamics (IGS), ie. the part of EUREF/Permanent project. This paper describes the background for the choice of locations, stabilization and precise measurements of local GPS-networks that connected the stations with EUREF/CROREF points nearby. The problems in the maintenance of the stations have been described as welI. A view on the perspective of permanent GPS-services in Croatia is given, too.
EN
EUPOS (European Position Determination System) is a new European initiative of establishment of the multifunctional reference station system in Central and Eastern countries. The Project EUPOS was initiated by the Berlin Senate Department for Urban Development and European Academy of the Urban Development Berlin. The project consists in establishment of about 440 multifunctional satellite reference stations in Central and Eastern Europe. Fourteen countries (Bulgaria, Czech Republic, Estonia, Germany, Hungary, Latvia, Lithuania, Macedonia, Poland, Romania, Russian Federation, Serbia & Montenegro, Slovakia and Slovenia) intend to participate in the project. One common project standard set will be observed by all countries, however the project will include the existing or developed infrastructure in participating countries. Experiences of all participating countries in establishing and operating satellite systems will also be used. The system will be compatible with the German network SAPOS and in future will use as main signal the signal of the European system Galileo. The network of reference stations will provide services for both positioning of the geodetic control points and for land, air and marine navigation. Several levels of positioning accuracy will be offered. The participating countries decided to form a Steering Committee. Eight working conferences of the Steering Committee were held up to now. The conferences were devoted to discussions on practical aspects of realisation of establishment of the network, the standards and possible sources of financial support for realisation of the Project. The project EUPOS was also presented at many international conferences and symposia.On 12 November 2003 the representatives of the EUPOS International Steering Committee have held consultations in Brussels with Galileo Joint Undertaking and the European Commission EuropeAid Co-operate Office. The objectives of consultations were to inform the EC about the Project EUPOS, its organisation, standards and services, links to the European Project Galileo and expected benefits for all participating countries. As positive aspects there were recognised short time (2,5-3 years) of realisation of the Project and the fact that the organisational structures of the project are already available. It was advised that the attempt could be made to request for financial support from different EU Programmes: ERDF for EU member countries (Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Slovakia, Slovenia), ISPA - for EU candidate countries (Bulgaria, Romania), CARDS - for West-Balkan countries (Macedonia, Serbia and Montenegro), TACIS - for the Russian Federation and INTERREG III C - for Germany (Coordinator of the Project). In August 2006 the Head Office of Geodesy and Cartography has signed with the Polish Ministry of Economy the agreement on financial support for establishment of EUPOS reference stations in Poland. The respective fund as given in the Project EUPOS was accepted and support will be given from structural ERDF EU programme. The detailed technical design of the network is already prepared. In order to cover the whole territory of Poland and to achieve the proper cross-border links there will be finally established 87 reference stations. According to the agreement the establishment of all stations should be concluded by September 2007. The tirst GPS receivers for some stations will be purchased in 2006.
EN
Central Europe Regional Geodynamic Project (CERGOP) in Slovenia includes GPS measurements on 5 sites. Within the first part of the project during years 1994-1997, measurements were performed on one site (Ljubljana), and during the CERGOP-2 extension in years 1999-2005 additional 4 sites were added (Bozica, Malija, Sneznik and Mrzlica). However, till now measurements on the three sites only (Ljubljana, Bozica and Malija) have been completed. Obtained data show similar sense and amount of horizontal displacements. They exhibit general northward movement of sites at the average velocity of 3 mm/yr. This is in accordance with results obtained from other sites of circum-Adriatic region, and it confirms the northward movement of the Adriatic microplate towards the "stable" Eurasian plate. In Slovenia, a northward oriented Ol tensor have been also obtained from several tens of earthquake fault pIane solution. Slight differences in sense and velocity of displacements among particular sites could be explained by the influence of local structures. In Slovenia, they belong to the Periadriatic dextral shear zone, to the Dinaric dextral shear zone, and tothe Transdanubian sinistraI shear zone. However, the real dynamics of particular structures, among which some also express co-seismic creep, will be possible to determine only by GPS measurements over a den ser network of sites.
10
Content available A software module for quqlity control of CEGRN sites
EN
GPS observations are still intluenced by a whole amount of effects, as for example multiple reflections, ionosphere etc. which have an impact on the accuracy of the observables even on carefully selected sites. Up to now these effects can not be mitigated or modelled satisfactorily. Hence the monitoring of these station specific effects is mandatory in order to judge about data quality and derive weighting or deletion schemes for optimal parameter estimation. Within the tasks of the work package 4 of the Central Europe Geodynamics Project (CERGOP), a software tool was developed to monitor the continuously operating reference stations of the network. The development was carried out using C++ libraries available for the most common operating systems. Here we describe the basic features of this package and give an overview of its present status.
PL
W ostatnich latach upowszechnia się technika komputerówo-satelitarna. Przybywa różnorodnych systemów satelitarnych, które bez przerwy monitorują naszą planetę, aby ostrzec przed różnorodnymi zagrożeniami (dostarczając m.in. danych dotyczących warunków meteorologicznych), umożliwić telekomunikację, precyzyjnie wyznaczać położenie (geodezja, nawigacja, budownictwo, transport kolejowy, samochodowy, morski i lotniczy), prowadzić akcje poszukiwawczo-ratownicze, badania naukowe z eksploracją kosmosu włącznie. Na forum międzynarodowym opracowywane są określone dokumenty normatywne, które obligują również Polskę do podjęcia prac naukowo-badawczo-wdrożeniowych w zakresie krajowego systemu stacji permanentnych RTK DGPS. Podkreślić należy, że w dowód uznania dotychczasowych osiągnięć kadry Wyższej Szkoły Oficerskiej Sił Powietrznych powierzono nam realizację projektu badawczego ОТ 00A 037 18 „System stacji permanentnych RTK DGPS dla potrzeb lotnictwa". Stąd celem tego artykułu jest przedstawienie jedynie istoty opracowywanego przez nasz kraj, z udziałem przedstawicieli WSOSP, polskiego systemu stacji permanentnych RTK DGPS (CORS - PL) na tle międzynarodowych tendencji.
12
Content available remote Podejście do lądowania według stacji permanentnej RTK DGPS
PL
Na forum międzynarodowym opracowywane są dokumenty normatywne, obligujące również i nasz kraj do podjęcia prac naukowo - badawczo - wdrożeniowych, których celem jest opracowanie polskiego systemu stacji permanentnych RTK DGPS. Na realizację tego projektu przyznane zostały przez KBN odpowiednie fundusze. Aktualnie w WSOSP realizowany jest projekt badawczy, którego celem jest opracowanie infrastruktury umożliwiającej wykorzystywanie techniki satelitarnej podczas wykonywania lotów trasowych, podejść do lądowania, startów w każdych warunkach atmosferycznych. Opracowany, lotniczy system stacji RTK DGPS powinien objąć obszar całego kraju, więc poniższe opracowanie przedstawi jedynie istotę polskiego systemu stacji permanentnych RTK DGPS (CORS - PL) na ile międzynarodowych tendencji.
EN
On international forum worked out are normative documents, concerning also our country to collections of works scientifically - searchingly of which aim is elaboration of Polish system of permanent station RTK DGPS. On realization this of project admited became by KBN suitable funds. At present in WSOSP realized is investigative project, of, which aim is elaboration of infrastructure making possible using satellite technology during executing of rout flights, to approach to landings, of starts in every circumstances atmospherical conditionses. Worked out, air-system of station RTK DGPS should embrace area of all country, so after mentioned elaboration introduces only creature of Polish system of permanent station RTK DGPS (CORS - PL) on background of international tendency.
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