海洋测绘2017，Vol.37Issue(3)：32-35,4.DOI:10.3969/j.issn.1671-3044.2017.03.007
一种基于GNSS测高的近海单站水位改正方法
A Method of Offshore Single Station Water-level Correction Based on GNSS Altimeter
摘要
Abstract
In the small and medium-sized projects for the marine surveys or bathymetric surveys,they often face the situation that the part of the measurement area is far away from the coast with the main features of the inconvenience to lay a tidal station on one side of the sea and a short duration and generally only a few days or more than 10 days.In view of the water level correction for this situation,this paper proposes a method of offshore single water-level correction based on GNSS altimeter.Firstly,the ellipsoidal height reflecting the variation of water level can be calculated according to the shipboard GNSS altimeter data after wave filtering and draft correction.Then,the datum deviation can be obtained using the least square fitting model between the single tidal water level and the ellipsoidai height water level.Finally,the ellipsoidal height water level is converted to the water level whose datum is consistent with the shore tidal station,so that the sounding data can be corrected in the measurement area.Experiments show that accuracy of the water level correction can achieve centimeter level using this method the meet the requirements of the relevant measurement specification and have application value.关键词
GNSS测高/水位改正/基准面偏差/小波滤波/最小二乘拟合Key words
GNSS altimeter/water level correction/datum deviation/wavelet filtering/least square fitting分类
天文与地球科学引用本文复制引用
孙月文,辛明真,李富强,王贤昆,阳凡林..一种基于GNSS测高的近海单站水位改正方法[J].海洋测绘,2017,37(3):32-35,4.基金项目
国家自然科学基金(41376108) （41376108）
测绘公益性行业科研专项(201512034) （201512034）
长江航道局重点科技项目(201630014). （201630014）
