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遥感技术与应用  2016, Vol. 31 Issue (5): 925-929    DOI: 10.11873/j.issn.1004-0323.2016.5.0925
微波遥感专栏     
基于GPS浮标的高度计定标技术研究
翟万林,陈春涛,朱建华,闫龙浩
(国家海洋技术中心,天津 300112)
Research of Calibration of Satellite Altimeter Technology based on GPS Bouy
Zhai Wanlin,Chen Chuntao,Zhu Jianhua,Yan Longhao
(National Ocean Technology Center,Tianjin 300112,China)
 全文: PDF(4930 KB)  
摘要:

20世纪90年代以来,卫星高度计在监测海平面变化、海洋环流、区域海面地形、气候变化等方面做出了巨大的贡献。但是,卫星高度计测量海面高度时都会存在偏差和偏移,需要进行定标。定标的基本原理是在卫星星下点位置处,卫星过境时刻现场测量海面绝对高度值,与卫星高度计的测量值进行对比,得到其偏差和偏移。利用自主设计的GPS浮标测量卫星过境时刻的瞬时绝对海面高度值,分别在山东石岛、海南清澜完成了4次针对HY-2卫星高度计的绝对定标工作。定标结果表明:①在岸基GPS基准站的支持下,使用自制的GPS浮标海面高程测量精度优于50 mm,满足高度计定标检验的需求;②HY-2卫星高度计测量的海面高度测量值随时间产生了漂移,存在系统偏差;③通过使用Jason-2高度计数据对HY\|2的相对定标和使用GPS浮标对其进行的绝对定标结果表明,HY\|2绝对海面高度测量的精度可以达到国际先进水平。

关键词: HY-2卫星高度计定标GPS浮标GAMIT/GLOBK    
Abstract:

Since 1990s,the satellite altimeter made a great contribution to the monitoring of sea level changes,ocean circulation,regional sea surface topography,climate change et.al.However,satellite altimeter has bias or drift when measuring the Sea Surface Height(SSH),so it needed to be calibrated.The principle of calibration is to measure the sea surface height in the same position of satellite when it travel through,then compare the in\|situ SSH with the value of altimeter measurements,and achieve the bias or drift of the altimeter.In this paper,a self-designed GPS buoys was used to measure the SSH when the satellite transit above.Four experiments was done to calibrate HY-2 altimeter in Shidao town of Shandong province and Qinglan town of Hainan province.The results showed that:①In support of GPS reference station,the precision of GPS buoy in measuring the SSH was better than 50mm.This could satisfy the demand of altimeter calibration.②There was a systematic bias in HY-2 satellite altimeter measurements.③By using the data of relative calibration between Jason\|2 and HY\|2 altimeter and absolute calibration results,HY-2 altimeter can reach the international advanced level.

 

Key words: HY-2    Satellite altimeter,Calibration    GPS buoy    GAMIT/GLOBK
收稿日期: 2015-10-15 出版日期: 2016-11-25
基金资助:

国家自然科学基金项目(41406204),海洋公益性行业科研专项资助项目(201305032-3)。

作者简介: 翟万林(1985-),男,工程师,山东滨州人,主要从事海洋遥感与测绘技术研究。Email:zwl13032@163.com。
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引用本文:

翟万林,陈春涛,朱建华,闫龙浩. 基于GPS浮标的高度计定标技术研究[J]. 遥感技术与应用, 2016, 31(5): 925-929.

Zhai Wanlin,Chen Chuntao,Zhu Jianhua,Yan Longhao. Research of Calibration of Satellite Altimeter Technology based on GPS Bouy. Remote Sensing Technology and Application, 2016, 31(5): 925-929.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2016.5.0925        http://www.rsta.ac.cn/CN/Y2016/V31/I5/925

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