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    Wyświetlanie 1-11 z 11
    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
    Tytuł:
    An automation gravity measurements with using PDA computers
    Autorzy:
    Pachuta, A.
    Dragan, G.
    Olszak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/225810.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    gravity measurements
    PDA computers
    pomiary grawitacyjne
    komputery PDA
    Opis:
    Preliminary processing of relative g measurements, including height, tidal, drift corrections and error analysis, was possible inthe field by use of GRAW22 software. Program has been developed at the Warsaw University of Technology in nineties of previous century in OPL language to PSION microcomputer (Pachuta at all, 2001). Newer field computers, enabled more computational power and modern programming languages, allowing wider programming possibilities. New software to field operations connected with relative gravity measurements has been developed on WindowsCE platform – by GRAVANALYSER. Software can be used on different palmtops and supports every steps connected with gravimeter reading, computation of corrections and strategy of processing. In this paper short description of such software is presented. Differences between selected strategies of drift and tidal corrections computation are also presented.
    Źródło:
    Reports on Geodesy; 2011, z. 1/90; 355-360
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of vertical movements in Warsaw and surrounding regions
    Autorzy:
    Margański, S.
    Wierzbicki, E.
    Olszak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/225446.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    krajowa sieć niwelacji
    Warszawa
    national leveling network
    Warsaw
    Źródło:
    Reports on Geodesy; 2011, z. 1/90; 287-294
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Activities of gravimertic laboratory at Józefosław Astro-geodetic Observatory in the frame of geodynamic investigations
    Autorzy:
    Barlik, M.
    Bogusz, J.
    Olszak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/224485.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    grawimetria
    obserwatorium astronomiczno-geodezyjne
    siła ciężkości
    obserwacje grawimetryczne
    gravimetry
    astro-geodetic observatory
    gravity
    gravimetric observations
    Źródło:
    Reports on Geodesy; 2006, z. 1/76; 129-138
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the global geopotential models for determination of the levelling normal correction
    Autorzy:
    Marganski, S.
    Kalinczuk-Stanałowska, K.
    Olszak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/225698.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    modele geopotencjalne
    pomiary geodezyjne
    geopotential models
    surveys
    Opis:
    Vertical networks in Poland are processed in the normal heights system called Kronstatt'86. Levelling evaluation of high precision measurements requires a determinations of normal levelling corrections, based on gravity Faye's anomalies. The purposes of the paper is to analyze the possibility of using in this computations the anomalies generated from global geopotential models while maintaining accuracy analysis which indicate a possible accuracy of Faye's anomalies. Author have compared gravity anomalies obtained directly from measurements with gravity anomalies generated from different global geopotential models EGM96, PGM96, EGM2008. Authors have prospered an algorithm of gravity anomalies computation on geoid surface after free-air moving anomalies from geopotential models. Comparison was made on points of vertical network located in medium-hill areas (around Starachowice near Kielce) and lowland (around Gostyn and Grudziadz) and on others test fields in Poland. The ability to use the geopotential models depends on their resultation. As a result of analysis concluded that only in the plain and lowland areas is possible to use data from global geopotential models with resolution above degree 720.
    Źródło:
    Reports on Geodesy; 2010, z. 1/88; 115-120
    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:
    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:
    Unified gravimetric reference frame for Polish IGS/EPN stations and geodynamic test fields
    Autorzy:
    Walo, J.
    Olszak, T.
    Pachuta, A.
    Próchniewicz, D.
    Szpunar, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/225691.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    pomiary geodezyjne
    pomiary grawimetryczne
    surveys
    gravity measurements
    Źródło:
    Reports on Geodesy; 2010, z. 1/88; 105-113
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Local geodynamic network in the Pieniny Klippen Belt. Results of seven GPS measurement epochs
    Autorzy:
    Walo, J.
    Czarnecki, K.
    Olszak, T.
    Pachuta, A.
    Szpunar, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/224450.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    Pieniny
    badania geodynamiczne
    geodynamika
    GPS
    system pozycjonowania obiektów
    Pieniny Klippen Belt
    geodynamic investigations
    geodynamics
    Global Positioning System
    Opis:
    The results or seven GPS observational campaigns have demonstrated mutual approaching trend or the Magura Nappe and the Podhale Flysh. Such a trend was disturbed during the period or 1995-2001 when the dam on the Dunajec-river was constructed and artificial lake was created. A hypothesis saying that the filling or the lake resulted in temporarily driving apart the Magura Nappe and Podhale Flysh has been presumed. After 2001 the tectonic structures "started to approach each other". The control points within the Iimits or the Pieniny Klippen Belt have demonstrated oscillatory changes or coordinates in the range of ±15 mm. The results or the last observation epoch show a disturbance or above mentioned trend. It would be due to earthquake in November 2004 that happened near the test field. This hypothesis should be verified next years by the following observational campaigns.
    Źródło:
    Reports on Geodesy; 2006, z. 1/76; 169-172
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geodynamical investigations in the Pieniny Mountain in 1994-2010
    Autorzy:
    Walo, J.
    Pachuta, A.
    Próchniewicz, D.
    Szpunar, R.
    Olszak, T.
    Barlik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/224922.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    pomiary grawimetryczne
    Pieniny
    gravimetric measurements
    Pieniny Mts.
    Opis:
    Geodynamical investigation in the Pieniny Mountain (south of Poland) were carried out since the 1960s. They contained levelling, gravimetric measurements and distance observations in horizontal network. The results reveled vertical and horizontal movements of the crust and periodic changes in gravity. In 1994-1995 horizontal network was adapted to perform GPS observations and they were carried out with leveling, gravimetric and EDM observations. In 1990s, the Dunajec river dam and the water resorvoirs in Czorsztyn and Sromowce Wyżne have been built. This has a new aspect in investigations releted to the effect of tectonic movements on the dam. Taking that into account, the study was revived, after six year break, in 2001. The investigations, which contain GPS, gravimetric and leveling observations, have been carried out every year. In this paper the result of horizontal displacement obtained from GPS measurement as well as gravity changes in 1994-2010 period are presented and yields linear trend in north-east direction less than 1 mm/year.
    Źródło:
    Reports on Geodesy; 2011, z. 2/91; 29-36
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Activities of Józefosław Astro-Geodetic Observatory in the last five decades
    Autorzy:
    Rogowski, J.B.
    Barlik, M.
    Litwosz, T.
    Kruczyk, M.
    Kujawa, L.
    Rajner, M.
    Olszak, T.
    Kurka, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/225082.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    Obserwatorium Astronomiczno–Geodezyjne w Józefosław
    historia
    Astronomical-Geodetic Observatory in Józefosław
    history
    Opis:
    Astro-Geodetic Observatory in Józefosław, witch belongs to the Departament of Geodesy and Geodetic Astronomy of the Warsaw University of Technology, started to permanent observations in 1958. First of them was time service started in February 1958, coordinated by BIH. From 1959 astrometrial latitude measurements have been done with aim to determine the parameters of the Earth rotation. In 1991 the Observatory was joned to the International GPS Service for Geodynamics (IGS) and started to operate as a permanent one in 1993. There have been performed many observations and scientific researches, such as: GPS in the frame of IGS/IGLOS/EUREF; tidal observations; absolute gravity measurements; changes of the vertical, based on the gravimetric measurements; astrometric observations and metrology. Moreover studies on RTK and DGPS measurements using mobile phone for data transmision are performed since 1998. WUT EUREF Lokal Analysis Centre, one of the 17 Lokal Analysis Centres acting in Europe, is a very important part of the Observatory. The Centre makes continuous service of one-week and daily aolution in the farme of EPN network, 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 measurenents. This paper present history and current state of the art of the Observatory's activites.
    Źródło:
    Reports on Geodesy; 2010, z. 2/89; 31-52
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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