辽宁工程技术大学学报（自然科学版）2023，Vol.42Issue(5)：555-563,9.DOI:10.11956/j.issn.1008-0562.2023.05.006
高斯拟合与滑动窗口相结合的GNSS-R海平面测高方法
GNSS-R sea level altimetry method based on Gaussian fitting and sliding window
摘要
Abstract
In order to improve the problem of poor signal separation and large deviation in the process of sea level height inversion,this paper proposes a new method of sea level height inversion based on Gaussian multi-peak fitting + sliding window,which can obtain high-quality signal-to-noise ratio sequence.The SNR(signal to noise ratio)of BDS(Beidou Navigation Satellite System)satellite B2,B6 and B7 bands at MAYG station was selected to invert the sea level height by Gaussian multi-peak fitting + sliding window method,and the inversion results of polynomial and wavelet filtering methods and tide station data were compared and verified.The results show that the accuracy of Gaussian fitting inversion results is 29%and 19%higher than that of polynomial and wavelet filtering methods,respectively,and the correlation is better.After combining the sliding window,the effective point of the inversion result is increased to 4.5 times before the windowing,and the time resolution is greatly improved.Compared with the single-frequency data inversion results,the effective point of the joint multi-frequency data inversion results is increased by more than 3 times,and the resolution is further improved while ensuring the accuracy.The results show that the GNSS-R(global navigation satellite system-reflectometry)sea level height inversion method combining Gaussian fitting and sliding window can better reflect the sea level height.关键词
GNSS-R/高斯拟合/信噪比/海平面高度/滑动窗口Key words
GNSS-R/Gaussian fitting/signal to noise ratio/sea level height/sliding window分类
天文与地球科学引用本文复制引用
王井利,周秀一,李如仁,王继野..高斯拟合与滑动窗口相结合的GNSS-R海平面测高方法[J].辽宁工程技术大学学报（自然科学版）,2023,42(5):555-563,9.基金项目
国家自然科学基金项目(51774204) （51774204）
