. Author manuscript; available in PMC: 2019 Aug 1.
Published in final edited form as: Remote Sens (Basel). 2019 Mar 16;11(6):641. doi: 10.3390/rs11060641
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/).