A flight test of the strapdown airborne gravimeter SGA-WZ in Greenland

Lei Zhao, René Forsberg, Meiping Wu, Arne Vestergaard Olesen, Kaidong Zhang, Juliang Cao

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An airborne gravimeter is one of the most important tools for gravity data collection over large areas with mGal accuracy and a spatial resolution of several kilometers. In August 2012, a flight test was carried out to determine the feasibility and to assess the accuracy of the new Chinese SGA-WZ strapdown airborne gravimeter in Greenland, in an area with good gravity coverage from earlier marine and airborne surveys. An overview of this new system SGA-WZ is given, including system design, sensor performance and data processing. The processing of the SGA-WZ includes a 160 s length finite impulse response filter, corresponding to a spatial resolution of 6 km. For the primary repeated line, a mean r.m.s. deviation of the differences was less than 1.5 mGal, with the error estimate confirmed from ground truth data. This implies that the SGA-WZ could meet standard geophysical survey requirements at the 1 mGal level.
Original languageEnglish
Issue number6
Pages (from-to)13258-13269
Publication statusPublished - 2015

Bibliographical note

This article belongs to the Special Issue Inertial Sensors and Systems.
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


  • Finite impulse response filter
  • Global positioning system
  • Gravity data
  • Inertial navigation system
  • Strapdown airborne gravimeter


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