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

doi:10.3390/s150613258

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

National University of Defense Technology

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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.

Original language	English
Journal	Sensors
Volume	15
Issue number	6
Pages (from-to)	13258-13269
ISSN	1424-8220
DOIs	https://doi.org/10.3390/s150613258
Publication status	Published - 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.

Keywords

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Sensors 15 13258Final published version, 1.4 MBLicence: CC BY

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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.",

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

Abstract

Bibliographical note

Keywords

UN SDGs

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