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Article

Retrieving and Verifying Three-Dimensional Surface Motion Displacement of Mountain Glacier from Sentinel-1 Imagery Using Optimized Method

1
College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China
2
State Key Laboratory of Cryospheric Science/TianShan Glaciological Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
3
School of Public Policy and Management, Anhui Jianzhu University, Hefei 230601, China
*
Author to whom correspondence should be addressed.
Academic Editor: Juraj Parajka
Water 2021, 13(13), 1793; https://doi.org/10.3390/w13131793
Received: 19 April 2021 / Revised: 27 June 2021 / Accepted: 27 June 2021 / Published: 29 June 2021
(This article belongs to the Section Hydrology)
The time series study of glacier movement is of special importance for rational management of freshwater resources, studying glacier evolution, understanding mechanism of glacier movement, and assessing disasters caused by glacier movement. In this paper, we put forward an optimization scheme for the shortcomings in the calculation method of using remote sensing to invert the three-dimensional (3D) surface motion displacement of glacier. The optimized method consists of Offset Tracking method, Optimizing the offset tracking results by means of iterative filtering, OT-SBAS technology and Conversion of 3D surface motion displacement of glacier. The Urumqi Glacier No. 1 was selected to test the optimized method. The 3D surface motion displacement of Urumqi Glacier No. 1 was retrieved by using the optimized method based on the ascending and descending Sentinel-1 datasets from 19 April to 29 August 2018. The distribution of 3D surface velocity of the Urumqi Glacier No. 1 was obtained in time series, and the accuracy of the inversion results was evaluated by using the field measurement data. The results show that the accuracies of the inverted displacements of east branch of Urumqi Glacier No. 1 (UG1E) were about 0.062, 0.063, and 0.152 m in the east, north and vertical directions, and these values for the west branch (UG1W) were 0.015, 0.020 and 0.026 m, respectively. It is indicated that using Sentinel-1 ascending and descending data and using the optimized method to retrieve the 3D surface motion displacement of glacier should satisfy the requirements of inversing the 3D surface motion displacement of high-latitude mountain glaciers in China. View Full-Text
Keywords: three-dimensional surface motion displacement; Urumqi Glacier No. 1; Sentinel-1; ascending and descending orbit data; high-latitude mountain glaciers in China; SAR three-dimensional surface motion displacement; Urumqi Glacier No. 1; Sentinel-1; ascending and descending orbit data; high-latitude mountain glaciers in China; SAR
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MDPI and ACS Style

Wang, Y.; Zhao, J.; Li, Z.; Zhang, M.; Wang, Y.; Liu, J.; Yang, J.; Yang, Z. Retrieving and Verifying Three-Dimensional Surface Motion Displacement of Mountain Glacier from Sentinel-1 Imagery Using Optimized Method. Water 2021, 13, 1793. https://doi.org/10.3390/w13131793

AMA Style

Wang Y, Zhao J, Li Z, Zhang M, Wang Y, Liu J, Yang J, Yang Z. Retrieving and Verifying Three-Dimensional Surface Motion Displacement of Mountain Glacier from Sentinel-1 Imagery Using Optimized Method. Water. 2021; 13(13):1793. https://doi.org/10.3390/w13131793

Chicago/Turabian Style

Wang, Yanqiang, Jun Zhao, Zhongqin Li, Mingjun Zhang, Yuchun Wang, Jialiang Liu, Jianxia Yang, and Zhihui Yang. 2021. "Retrieving and Verifying Three-Dimensional Surface Motion Displacement of Mountain Glacier from Sentinel-1 Imagery Using Optimized Method" Water 13, no. 13: 1793. https://doi.org/10.3390/w13131793

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