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. 2018 Jun 9;18(6):1893. doi: 10.3390/s18061893

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© 2018 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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(a) Comparison of the vehicle estimated speed with the two observers. (b) Zoom in at $t \in [45$ s $, 50$ s]. (c) Zoom in at $t \in [165$ s $, 175$ s].