Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Petras Petroškevičius"'
Autor:
Petras Petroskevicius, Eimuntas Parseliunas, Rosita Birvydiene, Darius Popovas, Romuald Obuchovski, Lina Papsiene
Publikováno v:
Geodetski Vestnik, Vol 58, Iss 4, Pp 746-755 (2014)
The paper reviews the gravimetric measurements carried out in Lithuania over the last twenty years. The first absolute ballistic gravimetric measurements were carried out at the three points by Jaakko Mäkinen (Finish Geodetic Institute) in 1994. The
Externí odkaz:
https://doaj.org/article/20a6d17dda9b4f0bb2c4befe57dfc2ad
Autor:
Petras Petroškevičius, Darius Popovas
Publikováno v:
Geodesy and Cartography, Vol 36, Iss 4 (2019)
The article discusses the impact of celestial bodies on the Earth’s gravity. The impact is described with reference to tide generating potential derived as a spherical function. The paper points to the zonal functions of a long period depending on
Externí odkaz:
https://doaj.org/article/681785ec74ca486caf9be291717a8300
Autor:
Rosita Birvydienė, Boleslovas Krikštaponis, Romuald Obuchovski, Eimuntas Paršeliūnas, Petras Petroškevičius, Dominykas Šlikas
Publikováno v:
Geodesy and Cartography, Vol 36, Iss 1 (2012)
Estimation of the 1:200 000 scale gravimetric map of Bouguer anomalies of the Lithuanian territory was done. It based on gravity measurements at the Lithuanian gravimetric network points. Totally the gravity accelerations of 686 points were used for
Externí odkaz:
https://doaj.org/article/405b3b56557a4437bf5c4e254db52ff6
Autor:
Petras Petroškevičius, Darius Popovas
Publikováno v:
Geodesy and Cartography, Vol 36, Iss 3 (2012)
The article analyzes the impact of celestial bodies on the equipotential surface of the Earth’s gravity field. It is necessary to assess impact while performing precise geodesic, gravimetric and astronomic measurements and doing research on the Ear
Externí odkaz:
https://doaj.org/article/45ab63b7253a400ab020cfc98cca7686
Publikováno v:
Geodesy and Cartography, Vol 32, Iss 1 (2012)
Results of investigation of the astronomical meridian determination possibilities are presented in the paper. For defining the meridian direction the method of astronomical azimuth determination by the hour angle of the Sun is analysed. Best conditio
Externí odkaz:
https://doaj.org/article/b1c8016c3c954a0ca836f74f93e6762b
Publikováno v:
Geodesy and Cartography, Vol 30, Iss 3 (2012)
Technical possibilities to create equipment for the calibration of flat angles are discussed in the article. The angular standard measure, the radian, has not been realised as a standard unit until now. Nevertheless, the unit of angular measure in de
Externí odkaz:
https://doaj.org/article/feae82f0d0e34dc69cfa7caf6eeb216e
Autor:
Rosita Birvydienė, Romuald Obuchovski, Eimuntas Paršeliūnas, Petras Petroškevičius, Dominykas Šlikas, Povilas Viskontas
Publikováno v:
Geodesy and Cartography, Vol 35, Iss 4 (2012)
The gravimetric control of Lithuania consists of three absolute gravity points and the first order gravimetric network covering 48 points. The second order gravimetric network was developed aiming at more detailed investigations into the geopotential
Externí odkaz:
https://doaj.org/article/a5216e48dde342398158ef183533fbfa
Autor:
Petras Petroškevičius, Darius Popovas
Publikováno v:
Geodesy and Cartography, Vol 34, Iss 1 (2012)
Influence of the celestial bodies on gravity field is analysed in this article. It is necessary to take into account this influence while making precise geodetic, gravimetric and astronomical measurements, defining sites coordinates of the Earth’s
Externí odkaz:
https://doaj.org/article/61c9173d34044002bdf3edace9368946
Publikováno v:
Geodesy and Cartography, Vol 32, Iss 3 (2012)
In our days precise geodetic instruments are very widely used in geodesy, building structures, surveying, machine engineering etc. Many of those instruments are based on precise measurement of the directions differences (ie measurement of angles). Su
Externí odkaz:
https://doaj.org/article/fcb5673508c04685a60d5094629172e1
Autor:
Petras Petroškevičius
Publikováno v:
Geodesy and Cartography, Vol 30, Iss 1 (2012)
Satellite geodesy equations of dynamic method, suitable for near-parabolic orbits of artificial satellites of the Earth are given in the paper. By the observed satellite topocentric coordinates, it is possible to specify zonal and non-zonal coefficie
Externí odkaz:
https://doaj.org/article/fa9789e3c24d482dbe5da7a22ab0fc7d