| 南极Dome A地区高精度DEM的建立——顾及波形重定、坡度改正及数据融合 |
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| 引用本文： | 李斐,宋国云,杨元德,郝卫峰,杨全明.南极Dome A地区高精度DEM的建立——顾及波形重定、坡度改正及数据融合[J].测绘学报,2017,46(4):403-410. |
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| 作者姓名： | 李斐 宋国云 杨元德 郝卫峰 杨全明 |
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| 作者单位： | 1. 武汉大学中国南极测绘研究中心, 湖北 武汉 430079;2. 武汉大学国家领土主权与海洋权益协同创新中心, 湖北 武汉 430079 |
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| 基金项目： | 国家自然科学基金，南北极环境综合考察及资源潜力评估专项，地理空间信息工程国家测绘地理信息局重点实验室开放基金，测绘地理信息公益性行业科研专项经费，高校基本科研业务费专项资金(2015644020201)The National Natural Science Foundation of China(Nos.41531069；41476163)；The Chinese Polar Environment Comprehensive Investigation & Assessment Programs(No.CHINARE2016)；The Open
Foundation of Key Laboratory of Geo-Informatics of National Mapping of Surveyi |
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| 摘 要： | 介绍了CryoSat-2LRM模式下优化后的OCOG、CFI和LIRT的3种波形重定算法。基于南极Dome-A昆仑站区的实测GPS数据,比较了CryoSat-2LRM模式下的3种波形重定方法,对不同波形重定算法下的测高数据进行了精度评估。结果表明优化后的OCOG算法精度最好,与GPS结果平均差值约为-0.07m,标准差约为0.60m,明显优于其他两种算法。通过比较坡度与卫星数据精度的关系,发现坡度因素对于卫星测高数据精度的影响不可忽视,在Dome A地区验证结果表明,坡度改正可使得卫星测高精度提高约38%。最后联合GPS和CryoSat-2OCOG数据,建立了南极Dome-A地区300m分辨率DEM,其精度约为0.24m。
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| 关 键 词： | CryoSat-2 Dome A GPS 波形重定 坡度改正 DEM |
| 收稿时间： | 2016-10-06 |
| 修稿时间： | 2017-03-17 |
Establishment of High Precision DEM in Antarctic Dome A Area with Taking the Waveform Retracking,Slope Correction and the Data Fusion into Account |
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| LI Fei,SONG Guoyun,YANG Yuande,HAO Weifeng,YANG Quanming.Establishment of High Precision DEM in Antarctic Dome A Area with Taking the Waveform Retracking,Slope Correction and the Data Fusion into Account[J].Acta Geodaetica et Cartographica Sinica,2017,46(4):403-410. |
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| Authors: | LI Fei SONG Guoyun YANG Yuande HAO Weifeng YANG Quanming |
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| Institution: | 1. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China;2. Collaborative Innovation Center for Territorial Sovereignty and Maritime Rights, Wuhan University, Wuhan 430079, China |
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| Abstract: | This paper introduces three kinds of waveform retracking algorithm: OCOG, CFI and LIRT in the CryoSat-2 LRM mode.The accuracy of satellite data is evaluated by comparing the results of three waveform retracking algorithm, based on the measured GPS data in the Dome A area of Antarctica.The results show that the accuracy of the optimal OCOG waveform retracking algorithm is the best, the average difference between the results and GPS is about-0.07m, the standard deviation is about 0.60m, which is obviously better than the other two algorithms.By comparing the relationship between the slope and the precision of the satellite data, we find the influence of slope factors on the precision of the satellite altimetry data can't be ignored, the verification results show that the slope correction can improve the accuracy of satellite altimetry by about 38% in the Dome A area.Finally we establish the Antarctic Dome A region DEM by combining the GPS and CryoSat-2 data, which resolution is 300m.the accuracy of fused DEM is about 0.24m. |
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| Keywords: | CryoSat-2 Dome-A GPS waveform retracking slope correction DEM |
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