Arid
DOI10.1007/s12524-009-0044-4
Advanced Analysis of Differences between C and X Bands using SRTM Data for Mountainous Topography
Sefercik, Umut Guenes; Alkan, Mehmet
通讯作者Alkan, Mehmet
来源期刊JOURNAL OF THE INDIAN SOCIETY OF REMOTE SENSING
ISSN0255-660X
EISSN0974-3006
出版年2009
卷号37期号:3页码:335-349
英文摘要

By Interferometric Synthectic Aperture Radar (InSAR), during the Shuttle Radar Topography Mission (SRTM) height models have been generated, covering the earth surface from 56 degrees south to 60.25 degrees north. With the exception of small gaps in steep parts, dry sand deserts and water surfaces, the free available US C-band data cover the earth surface from 56 south to 60.25 degrees north completely while the X-band data, distributed by the DLR (German Aerospace Center), cover it only partially. The C-band and X-band radar cannot penetrate the vegetation because of the short wavelength. Therefore, the height models are not Digital Elevation Models (DEM) representing bare Earth surface without any details, they are Digital Surface Models (DSM) representing the visible surface including vegetation and buildings. In the area of Zonguldak, Turkey, C-band and X-band DSMs are available and have been analysed in cooperation between Zonguldak Karaelmas University (ZKU) and Leibniz University of Hannover. The digitized contour lines from the 1:25,000 scale topographic maps and also a more precise height model derived directly from large scale photogrammetric mapping are used as reference height models.


The terrain inclination influences the accuracy strongly, but also the directions of the inclination in relation to the radar view direction, the aspects, are important. Independent from the aspects, the analysed results do have root mean square differences against the reference data fitting very well to the Koppe formula SZ=a+ b*tan alpha. The analyses are made separately for open and forest areas, with clear accuracy differences between both. Also, the analysis of X-band separately for three sub-areas is done and the positive effect of double observation to the accuracy has been clearly determined. The C-band data are only available with a spacing of 3 arcsec, corresponding to 92m x 70m, while the X-band data do have a spacing of 1 arcsec. This is important for the interpolation in the mountainous test area. The accuracy of the height points is approximately the same for the C- and the X-band data. But the C-band data which have three times larger spacing than X-band data, do not include the same morphological information. While C-band data contain very generalised contour lines X-band data have quite more details depending on 1 arcsec point spacing. The differential DEMs have been generated, separately, for displaying the differences between SRTM height models and reference DEMs of the test field.


英文关键词SRTM (Shuttle Radar Topography Mission) InSAR (Interferometric Synthetic Aperture Radar) DSM (Digital Surface Model) DEM (Digital Elevation Model) Accuracy
类型Article
语种英语
国家Turkey
收录类别SCI-E
WOS记录号WOS:000275958800001
WOS类目Environmental Sciences ; Remote Sensing
WOS研究方向Environmental Sciences & Ecology ; Remote Sensing
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/161800
作者单位ZKU Engn Fac, Geodesy & Photogrammetry Dept, TR-67100 Zonguldak, Turkey
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Sefercik, Umut Guenes,Alkan, Mehmet. Advanced Analysis of Differences between C and X Bands using SRTM Data for Mountainous Topography[J],2009,37(3):335-349.
APA Sefercik, Umut Guenes,&Alkan, Mehmet.(2009).Advanced Analysis of Differences between C and X Bands using SRTM Data for Mountainous Topography.JOURNAL OF THE INDIAN SOCIETY OF REMOTE SENSING,37(3),335-349.
MLA Sefercik, Umut Guenes,et al."Advanced Analysis of Differences between C and X Bands using SRTM Data for Mountainous Topography".JOURNAL OF THE INDIAN SOCIETY OF REMOTE SENSING 37.3(2009):335-349.
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