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.
Bibliographical noteThis article belongs to the Special Issue Inertial Sensors and Systems.
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- Finite impulse response filter
- Global positioning system
- Gravity data
- Inertial navigation system
- Strapdown airborne gravimeter
Zhao, L., Forsberg, R., Wu, M., Olesen, A. V., Zhang, K., & Cao, J. (2015). A flight test of the strapdown airborne gravimeter SGA-WZ in Greenland. Sensors, 15(6), 13258-13269. https://doi.org/10.3390/s150613258