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    Wyświetlanie 1-5 z 5
    Tytuł:
    Tidal research programme of Astro-Geodetic Observatory in Jozefoslaw
    Autorzy:
    Bogusz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/224709.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    Obserwatorium Astronomiczno-Geodezyjne w Józefosławiu
    pomiary grawimetryczne
    Astronomical-Geodetic Observatory in Józefosław
    gravimetric measurements
    Opis:
    Tidal gravimetric observations in Astro-Geodetic Observatory in Jozefoslaw started in 1993 using LaCoste&Romberg model G gravimeter. Since 2001 Observatory has been equipped with the ET-26 model dedicated to the stationary gravimetric measurements. Tidal research program also encompasses environmental studies to make the results more reliable. This elaboration presents the analyses of the data collected until 2009.
    Źródło:
    Reports on Geodesy; 2009, z. 1/86; 53-60
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investingation in tidal gravity results in Józefosław Observatory
    Autorzy:
    Rajner, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/225633.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    zjawiska pływowe
    pomiary grawimetryczne
    Obserwatorium Astronomiczno-Geodezyjne w Józefosławiu
    tidal phenomena
    gravity measurements
    Astronomical-Geodetic Observatory in Józefosław
    Opis:
    In this paper we used 40 months (2007-2010) of continuous gravity measurements to study different tidal phenomena. The records are taken from the Observatory in Józefosław equipped with LaCoste&RombergEarth Tide Gravimeter. Tidal gravity parameters in diurnal and semi-diurnal bands are computed using international standard data processing techniques. Accuracy assessment, as well variation in time of those parameters are given. Long series of consistent data allow to investigate in small signals such as gravity changes due to ocean loading. Subtracting body tides from results yields a differences up 1 uGal which are in good agreement with computed indirect ocean effect using most recent models. It clearly explains main source of disagreement between results from measurements and tidal models, despite of long distance to mearest ocean. Paper deals also with barometric pressure influence on gravity measurements. Importance of reducing pressure variation in tidal analysis is discussed and admittance factor is computed.
    Źródło:
    Reports on Geodesy; 2010, z. 1/88; 7-14
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring of the long-standing changes of the absolute gravity in Observatory of Józefosław and at main tectonics units of Poland territory
    Autorzy:
    Barlik, M.
    Olszak, T.
    Pachuta, A.
    Próchniewicz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/224705.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    Obserwatorium Astronomiczno-Geodezyjne w Józefosławiu
    pomiary grawimetryczne
    Astronomical-Geodetic Observatory in Józefosław
    gravimetric measurements
    Opis:
    Gravimetric investigations of the long-standing, not tidal variations of the absolute gravity using ballistic FG - 5 No. 230 gravity meter, bought by Warsaw University of Technology at 2005, were performed on four stations outside the Teisseyre - Tornquist Zone (T - T Zone) as well as at Józefoslaw Astro - Geodetic Observatory of the Warsaw University of Technology, located near Warsaw, near the northern edge of T - T zone on Precambrian Platform. Raw results of observations were corrected by Earth's tide influences, loading effects of the Earth's crust and ocean, by polar motion influence to the gravity as well as from the reason of gravitational and deformation influences of the atmosphere. Monitoring of the gravity on Józefosław station, during three years once a month, pointed out quasi-periodic non-tidal variations. Absolute gravity determinations in previous campaigns (1992 - 2001) on Polish territory were performed using various ballistic gravity meters, many types and quality, as well as there were spread in time. In epochs since 2006 to 2008 with our instrument FG - 5 No. 230 there were obtained the gravity values minor on all investigated stations. It was about 17 žGal on Satellite Lamkówko station, near Olsztyn, and 12 žGal in Borowiec Astro Geodynamical Observatory of the Space Research Centre, Polish Academy of Sciences with comparison to the results from 8 - 10 y earlier obtained using Polish absolute gravity meter ZZG, Italian IMGC and two FG-5 instruments from Austria and USA. The variation since 1996 to 2006 on Giby (station of the gravity national fundamental net) was appeared as only 7.5 žGal. On very stable station Ojców (Seismic Observatory of the Polish Academy of Sciences) located on Świętokrzyskie Mts. craton, the decrease of gravity equal to 9 žGal has been noticed after 9 years. Recovered variations of gravity on Poland territory might have the sources in gravity global or regional variations in the hydrological influences in the vicinity of stations as well as in incorrect earlier determinations of the gravimetric corrections, mainly in vertical gradient of gravity above absolute stations.
    Źródło:
    Reports on Geodesy; 2009, z. 1/86; 61-68
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Absolute gravimetric determinations of long-standing non-tidal gravity changes in Józefosław Astro - Geodetic Observatory of Warsaw Universitety of Technology and at main tectonic units on Poland territory
    Autorzy:
    Barlik, M.
    Olszak, T.
    Pachuta, A.
    Próchniewicz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/225075.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    pomiary grawimetryczne
    Obserwatorium Astronomiczno – Geodezyjnego w Józefosławiu
    gravimetric measurements
    Astronomical-Geodetic Observatory in Józefosław
    Źródło:
    Reports on Geodesy; 2010, z. 2/89; 11-19
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calibration of spring gravimeter using absolute gravity Measurements
    Autorzy:
    Rajner, M.
    Olszak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/225642.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    pomiary grawimetryczne
    Obserwatorium Astronomiczno-Geodezyjne w Józefosławiu
    gravity measurements
    Astronomical-Geodetic Observatory in Józefosław
    Opis:
    Comparison of gravimeters relative to absolute measurements is frequently used method for determination of gravimeters scale factor. This technique as completely non-invasive is especially important in periodic control of continuously recording gravimetres. We used 30 repeated parallel observation of LaCoste&Romberg spring gravimeter with FG5 ballistic gravimeter in Józefosław Observatory carried out in last 40 months. Long series of repeated measurements allow us for comprehensive study on utility of calibration with this procedure. Different computational approaches was performed. Temporary variation of LCR scale factor with accuracy assessment aer comsidered. Discussion concerning reliability of calibration dependent on measurements length was also given.
    Źródło:
    Reports on Geodesy; 2010, z. 1/88; 15-20
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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