摘要
给出了通过平均海面高模型计算海面高梯度的具体方法,选择DTU13、CNES_CLS15、WHU2013 3种模型计算了不同海域近岸比较点海面高梯度值,随机选择的30个近岸比较点处的计算结果表明:使用3种模型计算得到的海面高梯度值之间的标准差均值为0.19cm/km。在卫星高度计定标的具体应用中,由海面高梯度得到的海面高差改正量的误差应不超过0.3cm。
The specific method of calculating sea surface gradient through mean sea surface model is given. Sea surface gradient of different coastal positions around the world is calculated through DTU13,CNES _CLS15 and WHU2013.The results calculated at 30 random compare points showthat,the mean value of standard deviation of sea surface gradient in these points calculated by 3 models is less than 0. 19 cm/km. In the application of satellite altimeter calibration,the error of sea surface height difference computed through sea surface gradient should be less than 0.3 cm.
作者
管斌
孙中苗
翟振和
刘晓刚
GUAN Bin;SUN Zhongmiao;ZHAI Zhenhe;LIU Xiaogang(Institute of Geography Spatial Information,Information Engineering University,Zhengzhou 450052,China;State Key Laboratory of Geo-information Engineering,Xi＇an 710054,China;Xi＇an Research Institute of Surveying and Mapping,Xi＇an 710054,China)
出处
《海洋测绘》
CSCD
2018年第3期26-29,56,共5页
Hydrographic Surveying and Charting
基金
国家自然科学基金(41774018
41674082)
地理信息工程国家重点实验室自主研究课题(SKLGIE2018-ZZ-4)
关键词
卫星测高
绝对定标
海面高梯度
平均海面高模型
海面高差
satellite altimeter
absolute calibration
sea surface gradient
mean sea surface model
sea surfaceheight difference
