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Sensors 2015, 15(10), 25039-25054; doi:10.3390/s151025039

A Feasibility Analysis of Land-Based SINS/GNSS Gravimetry for Groundwater Resource Detection in Taiwan

Department of Geomatics, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Assefa M. Melesse
Received: 5 June 2015 / Revised: 21 September 2015 / Accepted: 22 September 2015 / Published: 29 September 2015
(This article belongs to the Section Remote Sensors)
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Abstract

The integration of the Strapdown Inertial Navigation System and Global Navigation Satellite System (SINS/GNSS) has been implemented for land-based gravimetry and has been proven to perform well in estimating gravity. Based on the mGal-level gravimetry results, this research aims to construct and develop a land-based SINS/GNSS gravimetry device containing a navigation-grade Inertial Measurement Unit. This research also presents a feasibility analysis for groundwater resource detection. A preliminary comparison of the kinematic velocities and accelerations using multi-combination of GNSS data including Global Positioning System, Global Navigation Satellite System, and BeiDou Navigation Satellite System, indicates that three-system observations performed better than two-system data in the computation. A comparison of gravity derived from SINS/GNSS and measured using a relative gravimeter also shows that both agree reasonably well with a mean difference of 2.30 mGal. The mean difference between repeat measurements of gravity disturbance using SINS/GNSS is 2.46 mGal with a standard deviation of 1.32 mGal. The gravity variation because of the groundwater at Pingtung Plain, Taiwan could reach 2.72 mGal. Hence, the developed land-based SINS/GNSS gravimetry can sufficiently and effectively detect groundwater resources. View Full-Text
Keywords: land-based SINS/GNSS gravimetry; gravity disturbance; groundwater resource detection land-based SINS/GNSS gravimetry; gravity disturbance; groundwater resource detection
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

Chiang, K.-W.; Lin, C.-A.; Kuo, C.-Y. A Feasibility Analysis of Land-Based SINS/GNSS Gravimetry for Groundwater Resource Detection in Taiwan. Sensors 2015, 15, 25039-25054.

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