Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 2016

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: superconducting gravimeter

Sortuj według:

Ogranicz wyniki do:

Nonlinear drift of the spring gravimeter caused by air pressure from the kunming GS15 gravimeters

Wei J., Shen W., Li H., Liu Z.

Polish Maritime Research

2016

S 1

180--186

In order to monitor and correct the meteorological factors of the spring gravity meter, the characteristics of the time varying gravity changes caused by meteorological factors were analyzed. Kunming GS15 gravity meter from 2007 continuous gravity observation has been carried out with the sampling rate of the pressure observation. In this study, we first compare the effects of 4 types of gravity meter and 3 different types of stations on the gravity observed seasonal gravity signals. It is indicated that the observed seasonal gravity signal of the cave is only 1/10, and there is a constant temperature and constant pressure device. Compared with the same time, the gravity signal of the gravity signal is about 100 times smaller. The influence of the pressure load of the gravity meter is tested by using the theory of pressure. The results show that only the actual value of 2cpd - 3cpd pressure load varies from -0.395 to -0.280×10-8ms-2 , and the 1cpd to 1 cpm periodic partial type gravity meter is also in accordance with the law of gravity and air pressure. And with the characteristics of time lag. In this paper, the nonlinear zero drift parameters of the linear regression model with time lag and the time series of the GS15 gravity meter are used to simulate the nonlinear zero drift parameters of the gravity meter. The results show that the gravity signal contains time lag 35 hours, and the air pressure admittance is 0.8 × 10-8ms-2/mbar. The correlation can reach 79%. The gravity changes signal and satellite gravity as well as the gravity water load signal of the land water model are the same as the gravity water load signal in the autumn as the minimum value, and the seasonal variation of the maximum value of gravity in summer.

A new superconducting gravimeter station in Central Europe: the iGrav-027 at the Borowa Gora Geodetic-Geophysical Observatory – installation and first results

Sekowski M., Dykowski P., Krynski J.

Geoinformation Issues

2016

Vol. 8, no. 1(8)

5--17

The gravimetric infrastructure of the Borowa Gora Geodetic-Geophysical Observatory of the Institute of Geodesy and Cartography, Warsaw, Poland, equipped so far with four LaCoste&Romberg model G gravimeters (3 of them with modern feedback systems) and the A10-020 field absolute gravimeter was enhanced in 2016 with a new iGrav-027 superconducting gravimeter. The iGrav-027 field gravimeter was delivered to the Observatory at the beginning of February 2016 and became fully operational late April 2016. The paper describes major aspects of the installation of the instrument as well as some technical issues faced during its installation. It also presents results of the initial analysis of data collected during the first month of operation of the instrument. The iGrav-027 records have been compared with 2.5 day simultaneous records of the A10-020 gravimeter, as well as with data obtained from three LaCoste&Romberg gravimeters which are used at the Borowa Gora Observatory for acquiring tidal records. Initial analysis also includes the first attempt to determine the scale factor (part of the transfer function) for the iGrav-027 superconducting gravimeter.

W 2016 roku infrastruktura grawimetryczna Obserwatorium Geodezyjno-Geofizycznego Borowa Góra – wyposażonego do tej pory w cztery grawimetry LaCoste&Romberg, model G (3 z nowoczesnym systemem odczytowym „feedback”) oraz przenośny grawimetr absolutny A10-020 – została rozszerzona o nowy grawimetr nadprzewodnikowy iGrav-027. Grawimetr iGrav-027 został dostarczony do Obserwatorium na początku lutego 2016 roku i pomyślnie uruchomiony pod koniec kwietnia 2016 roku. Artykuł przedstawia najważniejsze aspekty instalacji instrumentu, jak również problemy techniczne napotkane podczas procesu instalacji. Przedstawiono także wyniki wstępnej analizy danych zebranych podczas pierwszego miesiąca pracy urządzenia. Zapisy grawimetru iGrav-027 zostały porównane z 2.5 dniowym ciągiem jednoczesnych zapisów grawimetrem A10-020 oraz z danymi uzyskanymi z grawimetrów LaCoste&Romberg, które są wykorzystywane w Obserwatorium Borowa Góra do rejestracji danych pływowych. W ramach analizy danych dokonano również wstępnego wyznaczenia współczynnika skali (jako część funkcji przejścia) grawimetru iGrav-027.