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Sensors 2009, 9(4), 2944-2950; doi:10.3390/s90402944
Article

Compact Integration of a GSM-19 Magnetic Sensor with High-Precision Positioning using VRS GNSS Technology

* ,
,
,
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Department of Cartographical Engineering, Geodesy and Photogrammetry. Polytechnic University of Valencia. Camino de Vera s/n, 46022, Valencia, Spain
* Author to whom correspondence should be addressed.
Received: 24 March 2009 / Revised: 8 April 2009 / Accepted: 20 April 2009 / Published: 22 April 2009
(This article belongs to the Section Remote Sensors)
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Abstract

Magnetic data consists of a sequence of collected points with spatial coordinates and magnetic information. The spatial location of these points needs to be as exact as possible in order to develop a precise interpretation of magnetic anomalies. GPS is a valuable tool for accomplishing this objective, especially if the RTK approach is used. In this paper the VRS (Virtual Reference Station) technique is introduced as a new approach for real-time positioning of magnetic sensors. The main advantages of the VRS approach are, firstly, that only a single GPS receiver is needed (no base station is necessary), reducing field work and equipment costs. Secondly, VRS can operate at distances separated 50-70 km from the reference stations without degrading accuracy. A compact integration of a GSM-19 magnetometer sensor with a geodetic GPS antenna is presented; this integration does not diminish the operational flexibility of the original magnetometer and can work with the VRS approach. The coupled devices were tested in marshlands around Gandia, a city located approximately 100 km South of Valencia (Spain), thought to be the site of a Roman cemetery. The results obtained show adequate geometry and high-precision positioning for the structures to be studied (a comparison with the original low precision GPS of the magnetometer is presented). Finally, the results of the magnetic survey are of great interest for archaeological purposes.
Keywords: Magnetic data; GNSS positioning; VRS approach; sensor integration Magnetic data; GNSS positioning; VRS approach; sensor integration
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.

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MDPI and ACS Style

Martín, A.; Padín, J.; Anquela, A.B.; Sánchez, J.; Belda, S. Compact Integration of a GSM-19 Magnetic Sensor with High-Precision Positioning using VRS GNSS Technology. Sensors 2009, 9, 2944-2950.

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