Sea level change from BeiDou Navigation Satellite System-Reflectometry (BDS-R): First results and evaluation
Sea level change from BeiDou Navigation Satellite System-Reflectometry (BDS-R): First results and evaluation
复制标题
北斗卫星导航系统反射测量（BDS-R）的海平面变化：初步结果和评估
DOI：
10.1016/j.gloplacha.2016.12.010
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发表时间：
2017-02-01
影响因子：
3.9
通讯作者：
Wu, X.
中科院分区：
文献类型：
--
作者：
Jin, Shuanggen;Qian, Xiaodong;Wu, X.
海平面的变化影响着人类的生存环境，特别是沿海地区。验潮仪（TG）可以测量海平面的变化，而它是相对于陆地的相对变化。最近，GPS反射计（GPS-R）已被证明可以测量海平面变化作为一种高度计。随着中国北斗导航卫星系统（BDS）的快速发展，它可能提供一个新的可能的机会，监测海平面变化的三个频率（L2，L 6和L7）。本文首次将BDS-R技术应用于基于信噪比（SNR）和三频相位码组合的海平面变化估计中，并与验潮站观测结果进行了比较。结果表明，BDS信噪比和相位组合对海平面变化的相关系数在0.83-0.91之间，均方根误差小于0.6m，具有较好的一致性，而BDS码组合的相关系数和均方根误差小于0.6m。进一步得到了相位和码峰值频率与验潮站观测值之间的负线性模型，该模型改进了三频相位和码组合的结果，RMSE分别为10 cm和18 cm左右。(C)2016爱思唯尔B. V.保留所有权利。
Sea level changes affect human living environments, particularly ocean coasts. The tide gauges (TG) can measure sea level change, while it is the relative variations with respect to the land. Recently, GPS-Reflectometry (GPS-R) has been demonstrated to measure sea level change as an altimetry. With the rapid development of China's BeiDou Navigation Satellite System (BDS), it may provide a new possible opportunity to monitor sea level changes with three frequencies (L2, L6 and L7). In this paper, BDS-Reflectometry (BDS-R) is the first time used to estimate the sea level changes based on Signal-to-Noise Ratio (SNR) data and triple-frequency phase and code combinations, which are compared to tide gauge observations. Results show that sea level changes from BDS SNR and phase combination have a good agreement with correlation coefficients of 0.83-0.91 and RMSEs of less than 0.6 m, while BDS code combination is not as good as others. Furthermore, a new negative linear model between phase and code peak frequencies and tide gauge observations is further obtained and analyzed, which improves the results from three-frequency phase and code combinations with the RMSE of about 10 cm and 18 cm. (C) 2016 Elsevier B.V. All rights reserved.