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




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Department of Cartographical Engineering, Geodesy and Photogrammetry. Polytechnic University of Valencia. Camino de Vera s-n, 46022, Valencia, Spain





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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. View Full-Text

Keywords: Magnetic data; GNSS positioning; VRS approach; sensor integration Magnetic data; GNSS positioning; VRS approach; sensor integration





Author: Angel Martín * , Jorge Padín, Ana Belén Anquela, Juán Sánchez and Santiago Belda

Source: http://mdpi.com/



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