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Sensors 2015, 15(6), 13258-13269; doi:10.3390/s150613258

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

1
College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China
2
National Space Institute, Technical University of Denmark, Copenhagen Ø 2800, Denmark
*
Author to whom correspondence should be addressed.
Academic Editor: Gert F. Trommer
Received: 6 April 2015 / Revised: 20 May 2015 / Accepted: 21 May 2015 / Published: 5 June 2015
(This article belongs to the Special Issue Inertial Sensors and Systems)
View Full-Text   |   Download PDF [1434 KB, uploaded 5 June 2015]   |  

Abstract

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. View Full-Text
Keywords: gravity data; strapdown airborne gravimeter; inertial navigation system; finite impulse response filter; global positioning system gravity data; strapdown airborne gravimeter; inertial navigation system; finite impulse response filter; global positioning system
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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. (CC BY 4.0).

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MDPI and ACS Style

Zhao, L.; Forsberg, R.; Wu, M.; Olesen, A.V.; Zhang, K.; Cao, J. A Flight Test of the Strapdown Airborne Gravimeter SGA-WZ in Greenland. Sensors 2015, 15, 13258-13269.

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