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Sensors 2013, 13(7), 8879-8894; doi:10.3390/s130708879
Article

Development of a Network RTK Positioning and Gravity-Surveying Application with Gravity Correction Using a Smartphone

1
,
2
,
3
,
4
 and
4,*
1 Spatial Information Institute, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 608-737, Korea 2 Geologic Hazard & Industrial Resources Research Institute, Pusan National University, 63 Busandaehak-ro, Geumjeong-gu, Busan 609-735, Korea 3 Department of Civil Engineering, Yangsan University, 321 Myeonggok-ro, Yangsan 626-740, Korea 4 Department of Spatial Information Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 608-737, Korea
* Author to whom correspondence should be addressed.
Received: 9 May 2013 / Revised: 3 July 2013 / Accepted: 4 July 2013 / Published: 12 July 2013
(This article belongs to the Section Physical Sensors)
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Abstract

This paper proposes a smartphone-based network real-time kinematic (RTK) positioning and gravity-surveying application (app) that allows semi-real-time measurements using the built-in Bluetooth features of the smartphone and a third-generation or long-term evolution wireless device. The app was implemented on a single smartphone by integrating a global navigation satellite system (GNSS) controller, a laptop, and a field-note writing tool. The observation devices (i.e., a GNSS receiver and relative gravimeter) functioned independently of this system. The app included a gravity module, which converted the measured relative gravity reading into an absolute gravity value according to tides; meter height; instrument drift correction; and network adjustments. The semi-real-time features of this app allowed data to be shared easily with other researchers. Moreover, the proposed smartphone-based gravity-survey app was easily adaptable to various locations and rough terrain due to its compact size.
Keywords: gravity survey; smartphone; gravity correction; network RTK positioning gravity survey; smartphone; gravity correction; network RTK positioning
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Kim, J.; Lee, Y.; Cha, S.; Choi, C.; Lee, S. Development of a Network RTK Positioning and Gravity-Surveying Application with Gravity Correction Using a Smartphone. Sensors 2013, 13, 8879-8894.

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