title: A Flight Test of the Strapdown Airborne Gravimeter SGA-WZ in Greenland.
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.
authors.affiliation: College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China. zl_nudt@yahoo.com.|National Space Institute, Technical University of Denmark, Copenhagen Ø 2800, Denmark. zl_nudt@yahoo.com.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhao
authors.affiliation: National Space Institute, Technical University of Denmark, Copenhagen Ø 2800, Denmark. rf@space.dtu.dk.
authors.forename: René
authors.initials: R
authors.lastname: Forsberg
authors.affiliation: College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China. meipingwu@263.net.
authors.forename: Meiping
authors.initials: M
authors.lastname: Wu
authors.affiliation: National Space Institute, Technical University of Denmark, Copenhagen Ø 2800, Denmark. avo@space.dtu.dk.
authors.forename: Arne Vestergaard
authors.initials: AV
authors.lastname: Olesen
authors.affiliation: College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China. kdzhang@263.net.
authors.forename: Kaidong
authors.initials: K
authors.lastname: Zhang
authors.affiliation: College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China. cjl.nudt@gmail.com.
authors.forename: Juliang
authors.initials: J
authors.lastname: Cao
keywords: finite impulse response filter; global positioning system; gravity data; inertial navigation system; strapdown airborne gravimeter