@inproceedings{Barlik10e,

author	=	{Barlik, Marcin and Rajner, Marcin and Olszak, Tomasz},
title	=	{Analysis of measurements collected in gravity laboratory in Józefosław observatory during 2007-2010},
booktitle	=	{Proceedings: iag Symposium on Terrestial Gravimetry},
address	=	{Sankt Petersburg, Rosja},
eventdate	=	{2010-06-22/2010-06-25},
year	=	{2011},
editor	=	{Peshekhonov, V.},
pages	=	{116-120},

}

Astro-Geodetic Observatory in Józefosław (near Warszawa) is equipped with two gravimeters for different purposes. Continuously recording lcr et-26 spring gravimeter (since 2002) serves for determination accurate local tidal coefficients end investigation of environmental effect such as atmospheric and ocean influence on gravity. fg5 no. 230 ballistic gravimeter (since 2006) is operated periodically - once a month. Frequently measurements allows us for study non-tidal gravity changes caused mainly by hydrology. In this paper we present some advantages of using two types of gravity measurements. During calibration process the gravity records from ballistic gravimeter are used for determination of scale factor of spring gravimeter. On the other hand ballistic gravimeter utilize local tidal model determined from spring gravimeter for obtaining non-tidal series. Long series of synchronous measurements were used for determination of background noise, atmospheric (admittance factor), ocean and hydrological effect on gravity changes. The results from both gravimeters is presented and their agreement is discussed.