机载导航卫星反射信号海面高度测量

doi:10.7527/S1000-6893.2020.24852

电子电气工程与控制

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机载导航卫星反射信号海面高度测量

王峰, 杨东凯, 张国栋, 张波

北京航空航天大学电子与信息工程学院, 北京 100191

收稿日期:2020-10-10 修回日期:2021-01-27 出版日期:2022-01-15 发布日期:2021-01-26
通讯作者: 张波 E-mail:bozhang@buaa.edu.cn
基金资助:
国家自然科学基金（41774028）；博士后创新人才支持计划（BX20200039）

Measurement of sea surface height using airborne global navigation satellites system reflectometry

WANG Feng, YANG Dongkai, ZHANG Guodong, ZHANG Bo

School of Electronic and Information Engineering, Beihang University, Beijing 100191, China

Received:2020-10-10 Revised:2021-01-27 Online:2022-01-15 Published:2021-01-26
Supported by:
National Natural Science Foundation of China(41774028); Program for China Postdoctoral Innovative Talents Science(BX20200039)

摘要/Abstract

摘要： 对机载导航卫星反射信号海面高度测量模型、定点跟踪和模型拟合2种估计反射相对于直射信号时延的方法以及误差校正进行了研究。针对Z-V模型拟合法进行时延估计复杂度高的特点，提出了7-β模型和相应的时延估计方法；为消除定点跟踪法估计的时延中的海况偏差，提出了查表法和加权平均结合的校正方法。利用2015年12月3日CSIC-IEEC在波罗的海采集的机载数据进行了海面高度反演。结果表明通过已有时延估计方法和所提出的7-β模型拟合法对GPS L1和Galileo E1反射信号进行时延估计，并通过提出的误差校正算法对海况误差进行校正后可得到精度为亚米级海面高度。

关键词: GNSS反射信号, 海面高度, 时延估计, 跟踪, 误差校正

Abstract: This paper studies the measuring model of sea surface height using the airborne GNSS reflectometry, the estimation method of the delay between direct and reflected signals based on point tracking and model fitting, and error calibration. For the problem of high computational complexity of Z-V model fitting, a new fitting model named as 7-β model is proposed used to compute the delay between direct and reflected GNSS signal. In addition, an error calibration method is developed using the looking-up table and weighted averaging to correct the delay bias caused by the sea state. The validation is implemented utilizing the experimental data acquired by CSIC-IEEC in the Baltic Sea on December 3rd, 2015. The results show that the decimeter-level sea surface height can be obtained by using the existing and proposed methods to estimate the delay between direct and reflected GPS L1 and Galileo E1 signals and then using the proposed approach to correct the delay bias caused by the sea state.

Key words: GNSS reflectometry, sea surface height, delay estimation, tracking, error calibration

中图分类号:

王峰, 杨东凯, 张国栋, 张波. 机载导航卫星反射信号海面高度测量[J]. 航空学报, 2022, 43(1): 324852-324852.

WANG Feng, YANG Dongkai, ZHANG Guodong, ZHANG Bo. Measurement of sea surface height using airborne global navigation satellites system reflectometry[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(1): 324852-324852.

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

机载导航卫星反射信号海面高度测量

Measurement of sea surface height using airborne global navigation satellites system reflectometry

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