A Flight Test of the Strapdown Airborne Gravimeter SGA-WZ in Greenland

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 st...

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Bibliographic Details
Published in:Sensors
Main Authors: Zhao, Lei, Forsberg, René, Wu, Meiping, Olesen, Arne Vestergaard, Zhang, Kaidong, Cao, Juliang
Format: Text
Language:English
Published: MDPI 2015
Subjects:
Article
Greenland
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4507644/
http://www.ncbi.nlm.nih.gov/pubmed/26057039
https://doi.org/10.3390/s150613258
Description
Summary: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.

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