检索结果-南通市图书馆

Obtaining accurate measurements of the sea surface height from a GPS buoy

Acta Oceanologica Sinica 2023年第6期42卷 78-88页

作者： wanlin zhai Jianhua Zhu Chuntao Chen Wu Zhou Longhao Yan Yufei Zhang Xiaoqi Huang Kai Guo National Ocean Technology Center Tianjin 300112China School of Ocean Yantai UniversityYantai 266004China National Satellite Ocean Application Service Beijing 100081China

A dedicated GPS buoy is designed for calibration and validation(Cal/Val)of satellite altimeters since *** order to evaluate the accuracy of the sea surface height(SSH)measured by the GPS buoy,twelve campaigns have been done within China sea area between 2014 and *** six of these campaigns,two static Global Navigation Satellite System stations were installed at distances of<1 km and 19 km from the buoy to assess how the baseline length influenced the derived SSH from the buoy *** GPS buoy data was processed using the GAMIT/GLOBK software+TRACK module and CSRS-PPP tool to achieve the *** SSH was compared with conventionally tide gauge(TG)data to evaluate the accuracy of the buoy with the standard deviation of the height *** results showed that the difference in the standard deviation of the SSH from the buoy and the TG was less than 16 *** SSHs processed with different ephemeris(Ultra-Rapid,Rapid,Final)were not significantly *** the baseline length was 19 km,the SSH solution of the GPS buoy performed well,with standard bias of less than 26 mm between the heights measured by the buoy and TG,meaning that the buoy could be used for Cal/Val of *** bias between the Canadian Spatial Reference System-precise point positioning tool and the TRACK varied a lot,and some of them were over 130 *** deemed too high to be useful for Cal/Val of satellite ***,the GPS buoy solutions processed by GAMIT/GLOBK software+TRACK module were used for in-orbit Cal/Val of HY-2B/C satellites in ten *** SSH and significant wave height of the altimeters showed good agreements with the GPS buoy solutions.

关键词： GPS buoy sea surface height baseline length precise point positioning satellite altimeter HY-2

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preliminary calibration results for Jason-3 and Sentinel-3 altimeters in the Wanshan Islands

引用

Journal of Oceanology and Limnology 2021年第2期39卷 458-471页

作者： wanlin zhai Jianhua ZHU Xiaohui FAN Longhao YAN Chuntao CHEN Zhen TIAN National Ocean Technology Center Tianjin 300112China Tianjin Guohai Marine Engineering Survey Co.Ltd. Tianjin 300000China

We present preliminary calibration results for Jason-3 and Sentinel-3A altimeters that we set up in the Wanshan Islands in Guandong Province,*** campaigns were carried out in 2018,from March 8 to April 16 and from November 3 to December 11,*** GPS reference stations and tide gauges were established on the islands of Zhiwan,Dangan,and Wailingding during the *** in-situ sea surface height(SSH)of the altimeter footprint was determined using the tide *** tidal and geoid connection between the tide gauge locations and the altimeter footprints were computed with the NAO.99Jb tidal prediction system and the EGM 2008 geoid,*** data of the tide gauges were defi ned using the GPS buoy and GPS reference stations during the *** results show that the waveform of the altimeters was slightly contaminated by the small *** bias associated with Jason-3 and Sentinel-3A amounted to approximately+20.7±49.7 mm and+30.1±39.4 mm,respectively,which agreed well with the results from other in-situ calibration fi *** indicates that the Wanshan area was very suitable as an in-situ calibration/validation fi *** wet zenith delay(WZD)determined from the Microwave Radiometer(MWR)and the GPS measurements diff ered from each other for the Jason-3 and Sentinel-3A by−6.6±7.4 mm and 0±6.8 mm,respectively.

关键词： altimeter calibration tide gauge GPS buoy wet zenith delay

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An improved method of absolute calibration to satellite altimeter: A case study in the Yellow Sea, China

引用

Acta Oceanologica Sinica 2014年第5期33卷 103-112页

作者： LIU Yalong TANG Junwu ZHU Jianhua LIN Mingsen zhai wanlin CHEN Chuntao Ocean University of China National Ocean Technological Center State Oceanic Administration National Satellite Ocean Application Service State Oceanic Administration

An improved absolute calibration technology based on indirect measurements was developed through two probative experiments, the performance of which was evaluated by applying the approach to in situ sea surface height （SSH） at the Tianheng Island （tidal gauge） and the satellite nadir （GPS buoy）. Using Geoid/MSS （mean sea surface） data, which accounted for a constant offset between nadir and onshore tidal gauge water levels, and TMD （tidal model driver）, which canceled out the time-varying offsets, nadir SSH （sea surface height） could be indirectly acquired at an onshore tidal gauge instead of from direct offshore observation. The approach extrapolated the onshore SSH out to the offshore nadir with an accuracy of （1.88±0.20） cm and a standard deviation of 3,3 cm, which suggested that the approach presented was feasible in absolute altimeter calibration/validation （Cal/Val）, and the approach enormously facilitated the obtaining SSH from the offshore nadir.

关键词： radar altimeter absolute calibration Yellow Sea

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Absolute calibration of HY-2A and Jason-2 altimeters for sea surface height using GPS buoy in Qinglan, China

引用

Journal of Oceanology and Limnology 2019年第5期37卷 1533-1541页

作者： CHEN Chuntao ZHU Jianhua zhai wanlin YAN Longhao ZHAO Yili HUANG Xiaoqi YANG Weiwei National Ocean Technology Center Ministry of Natural Resources (MNR)

GPS buoy methodology is one of the main calibration methodologies for altimeter sea surface height calibration. This study introduces the results of the Qinglan calibration campaign for the HY-2A and Jason-2 altimeters. It took place in two time slices;one was from August to September 2014, and the other was in July 2015. One GPS buoy and two GPS reference stations were used in this campaign. The GPS data were processed using the real-time kinematic (RTK) technique. The fi nal error budget estimate when measuring the sea surface height (SSH) with a GPS buoy was better than 3.5 cm. Using the GPS buoy, the altimeter bias estimate was about -2.3 cm for the Jason-2 Geophysical Data Record (GDR) Version ‘D' and from -53.5 cm to -75.6 cm for the HY-2A Interim Geophysical Data Record (IGDR). The bias estimates for Jason-2 GDR-D are similar to the estimates from dedicated calibration sites such as the Harvest Platform, the Crete Site and the Bass Strait site. The bias estimates for HY-2A IGDR agree well with the results from the Crete calibration site. The results for the HY-2A altimeter bias estimated by the GPS buoy were verifi ed by cross-calibration, and they agreed well with the results from the global analysis method.

关键词： HY-2A altimeter calibration GPS buoy sea surface height Jason-2 altimeter

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Measurement of the sea surface using a GPS towing-body in Wanshan area

引用

Acta Oceanologica Sinica 2020年第5期39卷 123-132页

作者： wanlin zhai Jianhua Zhu Chaofei Ma Xiaohui Fan Longhao Yan He Wang Chuntao Chen National Ocean Technology Center Tianjin 300112China National Satellite Ocean Application Service Beijing 100081China Tianjin Guohai Marine Engineering Survey Co.Ltd Tianjin 300350China

Wanshan area has been chosen to be the specified field to calibrate and validate(Cal/Val)the HY-2 altimeter and its follow-on *** March 2018,an experiment has been conducted to determine the sea surface height(SSH)under the HY-2 A ground track(Pass No.203).A GPS towing-body(GPS-TB)was designed to measure the SSH covering an area of about 6 km×28 km wide centered on the HY-2 A altimeter satellite ground *** GPS reference stations,one tide gauge and a GPS buoy were placed in the research area,in order to process and resolve the kinematic solution and check the precision of the GPS-TB *** the GPS data were calculated by the GAMIT/GLOBK software and TRACK *** sea surface was determined by the GPS-TB solution and the tide gauge placed on Zhiwan *** the sea surface of this area was interpolated by Arc GIS10.2 with ordinary Kriging *** results showed that the precision of the GPS-TB is about 1.10 cm compared with the tide gauge placed nearby,which has an equivalent precision with the GPS *** interpolated sea surface has a bias of–1.5–4.0 cm with standard deviation of 0.2–2.4 cm compared with the checking *** gradient of the measured sea surface is about 1.62 cm/km along the HY-2 orbit which shows a good agreement compared with the CLS11 mean sea surface(MSS).In the Cal/Val of satellites,the sea surface between the tide gauge/GPS buoy and the footprint of altimeter can be improved by this work.

关键词： GPS towing-body sea surface height GPS buoy GPS reference station tide gauge sea surface

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preliminary calibration results of the HY-2B altimeter’s SSH at China’s Wanshan calibration site

引用

Acta Oceanologica Sinica 2021年第5期40卷 129-140页

作者： Chuntao Chen Jianhua Zhu Chaofei Ma Mingsen Lin Longhao Yan Xiaoqi Huang wanlin zhai Bo Mu Yongjun Jia School of Ocean Yantai UniversityYantai 264005China National Ocean Technology Center Ministry of Natural ResourcesTianjin 300112China National Satellite Ocean Application Service Ministry of Natural ResourcesBeijing 100081China

Satellite altimeter needs to be calibrated to evaluate the accuracy of sea surface height *** dedicated altimeter calibration field needs to establish a special calibration strategy and needs to evaluate its calibration *** paper describes absolute calibration of HY-2 B altimeter SSH using the GPS calibration method at the newly Wanshan calibration site,located in the Wanshan Islands,*** are two HY-2 B altimeter passes across the Wanshan calibration *** No.362 is descending and the ground track passes the east of Dan’gan *** No.375 is ascending and crosses the Zhiwan *** GPS data processing strategy of Wanshan calibration site was established and the accuracy of GPS calibration method of Wanshan calibration site was ***,the processing strategies of the HY-2 B altimeter for the Wanshan calibration site were established,and a dedicated geoid model data were used to benefit the calibration *** time-averaged HY-2 B altimeter bias was approximately 2.12 cm with a standard deviation of 2.08 *** performance of the HY-2 B correction microwave radiometer was also evaluated in terms of the wet troposphere path delay and showed a mean difference-0.2 cm with a 1.4 cm standard deviation with respect to the in situ GPS radiosonde.

关键词： calibration HY-2B altimeter Wanshan calibration site GPS buoy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于GPS浮标的高度计定标技术研究

引用

遥感技术与应用 2016年第5期31卷 925-929页

作者：翟万林陈春涛朱建华闫龙浩国家海洋技术中心天津300112

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... 详细信息

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50mm,满足高度计定标检验的需求;(2)HY-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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于GPS浮标的高度计海面高度产品检验技术进展

引用

海洋测绘 2012年第6期32卷 40-43页

作者：翟万林陈春涛闫龙浩国家海洋技术中心天津300112

主要介绍了卫星高度计在海洋学研究中的意义、高度计的定标原理、定标方法和国际主要的高度计定标试验场。结合卫星高度计定标的特点,着重介绍了GPS浮标在高度计定标中的优势、技术难点以及解决方法等,旨在为海洋二号卫星的高度计定标... 详细信息

主要介绍了卫星高度计在海洋学研究中的意义、高度计的定标原理、定标方法和国际主要的高度计定标试验场。结合卫星高度计定标的特点,着重介绍了GPS浮标在高度计定标中的优势、技术难点以及解决方法等,旨在为海洋二号卫星的高度计定标技术提供依据。

关键词：遥感高度计产品检验海洋大地测量 GPS浮标 GPS数据处理

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

GPS浮标测高精度影响因素研究

引用

中国工程科学 2014年第6期16卷 102-108页

作者：闫龙浩陈春涛翟万林朱建华张倩张晓旭国家海洋技术中心天津300112

海洋二号(HY-2)卫星高度计已在轨运行两年多,亟需深入开展海面高度定标工作,基于全球定位系统(GPS)浮标的高度计海面高度定标法是主要的定标方法。GPS浮标定标法的定标精度受到时间窗口、浮标姿态、温盐以及相位中心等因素影响。为了提... 详细信息

海洋二号(HY-2)卫星高度计已在轨运行两年多,亟需深入开展海面高度定标工作,基于全球定位系统(GPS)浮标的高度计海面高度定标法是主要的定标方法。GPS浮标定标法的定标精度受到时间窗口、浮标姿态、温盐以及相位中心等因素影响。为了提高高度计海面高度GPS定标法的定标精度,本文对影响GPS浮标测高精度的主要因素进行了分析研究。结果表明,在充分考虑影响因素基础上自主研制的GPS浮标高程测量精度可以达到1 cm,满足高度计海面高度定标要求。

关键词： GPS浮标精度影响因素高度计定标

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于GPS的高度计海面高度定标浮标设计

引用

中国工程科学 2014年第6期16卷 109-112页

作者：陈春涛闫龙浩张晓旭张倩翟万林朱建华国家海洋技术中心天津300112

全球定位系统(GPS)浮标是高度计海面高度定标的重要仪器。本文介绍了GPS浮标的组成和工作原理,分别对GPS浮标的外型设计、舱体设计、密封性设计、供电设计做了详细介绍,最后利用数值模拟的方式,对设计的GPS浮标在3级海况下的摇摆和升沉... 详细信息

全球定位系统(GPS)浮标是高度计海面高度定标的重要仪器。本文介绍了GPS浮标的组成和工作原理,分别对GPS浮标的外型设计、舱体设计、密封性设计、供电设计做了详细介绍,最后利用数值模拟的方式,对设计的GPS浮标在3级海况下的摇摆和升沉响应进行模拟试验。结果表明自主设计的GPS浮标能够满足海上高度计海面高度定标的需求。

关键词：卫星高度计定标 GPS浮标数值模拟

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：