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. 2021 Jun 29;11:13518. doi: 10.1038/s41598-021-91949-y

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Blue triangles represent the DS lake level from 11th June 2014 to 29th March 2017, in meters below mean sea level, data provided by the Hydrological Service and Water Authority, Israel (Gauge near Massada). The DS lake level determined from GNSS reflectometry observations (Fig. 1, Beach stations) is shown in light blue (dots), with error bars. The standard error of the GNSS measurements is ± 2.7 cm. (Insert) The correlation coefficient between the two time series is 0.99, indicating the high accuracy of the GNSS observations.