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4 Reports on Geodesy

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Results one-hour GPS data processing

100%

Figurski M. , Litwosz T.

tom z. 8/54

115-121

Results of the CERGOP`99 adjusment performed by the WUT CERGOP processing centre

80%

Figurski M. , Kujawa L. , Litwosz T. , Rogowski J.

tom z. 6/52

153-161

Determination of the local deformation model for Józefosław observatory

70%

Bogusz J. , Kruczyk M. , Litwosz T. , Pfeil M. , Rogowski J.

tom z. 8/54

69-74

Astro-Geodetic Observatory in Józefoslaw is one of the EUREF/IGS sites. In the Observatory there are several continuous observations performed such as: - GPS observatiuns using two receivers; - Tidal measurements witb LC&R gravimeter; - Astrometric observations aimed at latitude changes determinations; - Meteorological measurements. Warsaw University of Technology EUREF Analysis Centre works in the frame of the Observatory. The bank of regional observations is also conducted. The results of the processing of the observations mentioned above could be used to verification of the tidal and non-tidal deformation models that are used in GPS data processing perfomed by WUT EUREF LAC. This paper presents the results of the tidal and astrometric analyses and their comparison to the standard IERS models. U also deals with the non-tidal deformation model comes from the atmosphere in the meaning of the height (GPS) and gravity (gravimetry) corrections.

Activities of astro-geodetic observatory in Jozefoslaw in 2000

51%

Bogusz J. , Figurski M. , Kruczyk M. , Kujawa L. , Kurka W. , Litwosz T. , Pfeil M. , Rogowski J.

tom z. 2/57

153-159

Astro-geodetic Observatory of the Institute of Geodesy and Geodetic Astronomy of the Warsaw University of Technology in Józefosław was incorporated in 1957. In 1991 it was joined to the International GPS Service for Geodynamics (IGS) and started to operate as a permanent one in 1993. Since then the following permanent services have been maintained: GPS observations using Trimble and Turbo Rogue receivers, tidal gravimetric observations with LaCoste&Romberg model D gravimeter and meteorological obseryations. Since 1995 WUT Local Analysis Centre, one of the 13 local Analysis Centres acting in Europe, has started the systematic day-to-day processing of the selected number of European sites in the frame of the EUREF network. It processes national and International GPS campaigns (CEGRN, EXTENDED SAGET etc.), models ionosphere and troposphere parameters, compute tidal components and changes of the vertical according to astrometric and gravimetric measurements. For last 5 years the Centre has processed and analysed many of scientific researches carried out in within the confines of the Central European Initiatiye (CEI). This paper presents state of the art of the Observatory's actiyities. It deals with the acting of it and participating of the WUT Local Analysis Centre to the international scientific projects.