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Assessment of interferometric dems from terrasar‐x stripmap and spotlight stereopairs: case study in istanbul
Author(s) -
Sefercık Umut G.,
Yastıklı Nacı
Publication year - 2014
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/phor.12062
Subject(s) - remote sensing , digital elevation model , synthetic aperture radar , interferometry , resolution (logic) , shuttle radar topography mission , computer science , geology , digital surface , high resolution , geodesy , artificial intelligence , physics , optics , lidar
Terra SAR ‐X ( TSX ) has led to a new era for synthetic aperture radar ( SAR ) imaging, offering high‐resolution (1 m) data that was not previously available from space. The TSX X‐band sensor can be operated in three interferometrically compatible imaging modes: Stripmap ( SM ), high‐resolution Spotlight ( HS ) and Scan SAR . Due to the low resolution of Scan SAR (16 to 30 m), SM and HS images are preferred for resolution‐based applications. This paper attempts to validate and compare the digital elevation models ( DEM s) derived from TSX SM and HS image pairs. Digital surface models ( DSM s) were generated by interferometry in a part of Istanbul with a variety of ground types. These DSM s were converted to DEM s by filtering and then compared with a reference DEM produced from aerial photographs. The quality assessment was performed using advanced analyses concerned with accuracy and morphologic detail. The results of both absolute and relative accuracy analyses clearly reveal that the quality of the TSX HS DEM is better than SM and very consistent with the reference model.