极地研究

极地研究 ›› 2015, Vol. 27 ›› Issue (1): 83-90.DOI: 10.13679/j.jdyj.2015.1.083

• 研究论文 • 上一篇    下一篇

基于光学立体和InSAR的Grove山地区DEM建立和分析

万雷1,2  周春霞1,2  鄂栋臣1,2   

  1. 1武汉大学中国南极测绘研究中心，湖北 武汉 430079；
    2极地测绘科学国家测绘局重点实验室，湖北 武汉 430079
  • 收稿日期:2013-10-30 修回日期:2014-01-23 出版日期:2015-03-30 发布日期:2015-03-30
  • 通讯作者: 周春霞
  • 基金资助:

    国家自然科学基金;南北极环境综合考察与评估专项;民用航天"十二五"预先研究项目;中国极地科学战略研究基金

GENERATION AND COMPARISON OF ASTER DEM AND INSAR DEM OF THE GROVE MOUNTAINS AREA

Wan Lei1,2, Zhou Chunxia1,2, E Dongchen1,2   

  1.  
    1Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China；
    2Key Laboratory of Polar Surveying and Mapping, SBSM, Wuhan 430079, China
  • Received:2013-10-30 Revised:2014-01-23 Online:2015-03-30 Published:2015-03-30

PDF (PC)

1430

被引次数

2

摘要： 本文分别利用光学立体和InSAR技术生成了东南极Grove山地区15 m分辨率的ASTER DEM和20 m分辨率的InSAR DEM。在利用ASTER立体像对生成DEM的过程中引入ICESat测高数据作为高程控制以减少错误匹配，提高DEM垂直精度；而在利用ERS tandem数据生成DEM后，选取ICESat测高数据对InSAR DEM进行倾斜面纠正，以消除基线不精确估计等带来的影响。通过与未作控制的ICESat测高数据进行比较，评价了两种DEM的精度并对误差进行了分析。同时，比较了两种DEM的差异，并分析了造成这些差异的原因，探讨了两种技术生成南极冰盖DEM的优势和不足。最后结合两DEM的优势，融合生成了Grove山地区高精度的DEM。

关键词: ASTER, InSAR, 数字高程模型(DEM), Grove山

Abstract: A 15-m ASTER Digital Elevation Model (DEM) of the Grove Mountains area which is located at 72°45′S, 75°00′E was generated by optical stereo technique and an InSAR DEM with resolution of 20 m was derived. ICESat data were introduced in the process of the ASTER DEM construction, and utilized to correct the InSAR DEM. ICESat footprints were used as elevation control points during the ASTER DEM generation to reduce mismatching points. Finally, the vertical accuracy of the DEM was improved. The InSAR DEM was corrected using the quadratic polynomial with ICESat footprints as control points. And this correction has been designed to eliminate errors introduced by inaccurate estimations of the baseline. The accuracies of the ASTER and InSAR DEMs were evaluated using another set of ICESat data and the major error sources were discussed. Furthermore, the two DEMs were compared and analyzed. The specific advantages and disadvantages of these two techniques in DEM construction of the ice sheet in Antarctica were elaborated, and the advantages of both DEMs were combined to generate a high-accuracy DEM of the Grove Mountains area.

Key words: ASTER, InSAR, DEM, Grove Mountains