Acta Geodaetica et Cartographica Sinica >

2018 , Vol. 47 >Issue 4: 498 - 507

DOI: https://doi.org/10.11947/j.AGCS.2018.20170348

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

  • TIAN Shanchuan ,
  • HAO Weifeng ,
  • LI Fei ,
  • LUO Tianwen
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  • 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 date: 2017-06-22

  Revised date: 2018-01-10

  Online published: 2018-05-02

Supported by

The Hubei Provincial Natural Science Foundation of China (No. 2015CFB500)

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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

Cite this article

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 . DOI: 10.11947/j.AGCS.2018.20170348

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