顾及陆湖反射差异的卫星测高监测湖泊水位的波形分析与重定

doi:10.11947/j.AGCS.2018.20170348

测绘学报 ›› 2018, Vol. 47 ›› Issue (4): 498-507.doi: 10.11947/j.AGCS.2018.20170348

顾及陆湖反射差异的卫星测高监测湖泊水位的波形分析与重定

田山川¹, 郝卫峰¹, 李斐^1,2,3, 罗天文²

1. 武汉大学中国南极测绘研究中心, 湖北武汉 430079;
2. 武汉大学测绘遥感信息工程国家重点实验室, 湖北武汉 430079;
3. 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

收稿日期:2017-06-22 修回日期:2018-01-10 出版日期:2018-04-20 发布日期:2018-05-02
通讯作者: 郝卫峰 E-mail:haowf@whu.edu.cn
作者简介:田山川(1994-),男,工程硕士,研究方向为卫星测高。E-mail:shanchuantian@163.com
基金资助:
湖北省自然科学基金（2015CFB500）

Waveform Analysis and Retracking of Lake Level Monitoring by Satellite Altimeter Considering the Difference Between Land and Lake Reflection

TIAN Shanchuan¹, HAO Weifeng¹, LI Fei^1,2,3, LUO Tianwen²

1. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China;
2. State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;
3. Collaborative Innovation Center for Territorial Sovereignty and Maritime Rights, Wuhan University, Wuhan 430079, China

Received:2017-06-22 Revised:2018-01-10 Online:2018-04-20 Published:2018-05-02
Supported by:
The Hubei Provincial Natural Science Foundation of China (No. 2015CFB500)

摘要/Abstract

摘要： 以Jason-2卫星雷达测高数据监测洪泽湖水位为例，分析了湖泊水位沿卫星轨迹呈"V"字形分布的原因。分析发现：由于湖泊面积相对较小，受陆地影响，测高波形中陆地反射信号占主导地位，水面反射产生的上升前缘非常小，导致波形跟踪出错。解释了波形形成的机制、造成水位计算错误的原因，结合遥感影像证明了解释的正确性，并给出了相应的波形重定算法。结果表明，该重定算法优于常用的波形重定算法，剔除异常值后水位标准差为0.09 m，为湖泊区域的测高数据处理提供了一种参考。

关键词: 波形分析, 反射差异, 波形重定, 湖泊水位

Abstract: The phenomenon that the distribution of water level along the satellite track is like a "V" is analyzed.To show the problem,the water level of Hongze Lake is calculated by Jason-2 satellite altimeter data.The analysis shows that the signal of ground reflection dominates the shape of waveform due to the small size of the lake and influence of land.In this case,the leading edge produced by water is not obvious,so it is easy to retrack the wrong middle point.The mechanism of waveform formation and the causes of water level calculation errors is explained and proved with remote sensing images.And the corresponding waveform retracking algorithm is proposed.The results indicate that the proposed algorithm performs better than common waveform retracking algorithm.After removing the abnormal value,the standard deviation of the water level reaches 0.09m,which means the analysis method could be a reference for altimeter data processing in lake region.

Key words: waveform analysis, reflection differences, waveform retracking, lake water level

中图分类号:

P228

田山川, 郝卫峰, 李斐, 罗天文. 顾及陆湖反射差异的卫星测高监测湖泊水位的波形分析与重定[J]. 测绘学报, 2018, 47(4): 498-507.

TIAN Shanchuan, HAO Weifeng, LI Fei, LUO Tianwen. Waveform Analysis and Retracking of Lake Level Monitoring by Satellite Altimeter Considering the Difference Between Land and Lake Reflection[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(4): 498-507.

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顾及陆湖反射差异的卫星测高监测湖泊水位的波形分析与重定

Waveform Analysis and Retracking of Lake Level Monitoring by Satellite Altimeter Considering the Difference Between Land and Lake Reflection

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