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. 2016 Jul 19;16(7):1109. doi: 10.3390/s16071109

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© 2016 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Derivation of the Dip Angle From the Projected Normal Vector $V_{n_p r j}$ in the Longitudinal Section (modified from [15]). The dip is the angle between $V_{n_p r j}$ and z positive semi-axis, as well as the angle between the sensor board and the horizontal plane.