Released
Dataset

Superconducting Gravimeter Data from Borowa Gora - Level 1

Cite as:

Dykowski, Przemyslaw; Sekowski, Marcin; Krynski, Jan (2018): Superconducting Gravimeter Data from Borowa Gora - Level 1. GFZ Data Services. https://doi.org/10.5880/igets.bg.l1.001

Status

I   N       R   E   V   I   E   W : Dykowski, Przemyslaw; Sekowski, Marcin; Krynski, Jan (2018): Superconducting Gravimeter Data from Borowa Gora - Level 1. GFZ Data Services. https://doi.org/10.5880/igets.bg.l1.001

Abstract

The International Geodynamics and Earth Tide Service (IGETS) was established in 2015 by the International Association of Geodesy. IGETS continues the activities of the Global Geodynamics Project (GGP) between 1997 and 2015 to provide support to geodetic and geophysical research activities using superconducting gravimeter (SG) data within the context of an international network.



As a new addition to this network, the iGrav-027 superconducting gravimeter had been installed at the Borowa Gora Geodetic-Geophysical Observatory which has been established in late 1930s. Continuous time-varying gravity and atmospheric pressure data from the SGs at Borowa Gora are integrated in the IGETS data base hosted by ISDC (Information System and Data Center) at GFZ.



Borowa Gora Geodetic-Geophysical Observatory is located in Poland, situated 50 km north of Warsaw (longitude: 21.0359 E, latitude: 52.2755 N, height above MSL: 109 m). The operation and maintenance of the Borowa Gora instrumentation is done by staff of the Institute of Geodesy and Cartography. The shortest distance to the Baltic Sea coastline is approx. 240 km. The area is located in a tectonically quiet zone. Geologically the situation is not well recognized, a significant size artificial reservoir is located within 1-2 km from the Observatory. The environment is a not significantly urbanized area with visible daily seismicity. The climate at this place has rough winters (up to -20 degrees Celsius) and hot summers (up to 35 degrees Celsius).


The iGrav-027 is located in a specially prepared chamber in the basement of one of the Observatory buildings. It is separated from the compressor operating in a separate room. The location of the gravimeter ensures a relatively stable temperature of 21°C ±2°C throughout the year. The instrument is placed on a specially prepared concrete monument of 1.2 × 1.2 m horizontal and 1.5 m vertical dimensions (ca 1.3 m deep below floor level). The sensor of the instrument is located about 2 m below ground level, and the position and height of the instrument has been determined with a centimetre accuracy, before the installation.


The iGrav-027 is co-located in the same building with the A10-020 absolute gravimeter. There are three well monumented pillars for absolute gravity determinations, which can be conducted along with the operating iGrav-027 (e.g. for the comparison with absolute gravimeters). In the vicinity of the observatory several further pillars were set up for various other geodetic antennas and instrumentation.



Borowa Gora is a geodynamic observatory comprising space techniques and ground instruments. The iGrav-027 operation started at the end of April 2016, official start is assigned as from 1th of May 2016. Since that time the time series is carried out without interruption up to present. The time sampling of the raw gravity and barometric pressure data of IGETS Level 1 is 1 minute. Future plans include uploading 1s data sampling also. In addition, Borowa Gora is equipped with auxiliary data supporting the interpretation of the SG measurements, which is, however, not provided in the IGETS data base due to complexity. These are a local network of hydrological and meteorological sensors as well as two permanent GNSS (Global Navigation Satellite Systems) stations BOGO and BOGI. Additionally magnetic field variations are also recorded.

Authors

  • Dykowski, Przemyslaw;Institute of Geodesy and Cartography, Warsaw, Poland
  • Sekowski, Marcin;Institute of Geodesy and Cartography, Warsaw, Poland
  • Krynski, Jan;Institute of Geodesy and Cartography, Warsaw, Poland

Contact

Contributors

Voigt, Christian

Keywords

Superconducting gravimetry, Earth tides, Geodynamics, IGETS, International Geodynamics and Earth Tide Service, geodesy, geophysics, hydrology

GCMD Science Keywords

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        • subject: International Geodynamics and Earth Tide Service
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