Calibration of ASTER and ETM + imagery using empirical line method-a case study of north-east of Hajjah, Yemen

Qaid, Ali M. and Basavarajappa, H. T. and Rajendran, S. and Ashfaq, S. A. and Xu, Junfeng (2009) Calibration of ASTER and ETM + imagery using empirical line method-a case study of north-east of Hajjah, Yemen. Geo-spatial Information Science, 12 (3). pp. 197-201. ISSN 1993-5153

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Official URL: http://doi.org/10.1007/s11806-009-0052-0

Abstract

This study is aimed at using the Empirical Line Method (ELM) to eliminate atmospheric effects with respect to visible and near infrared bands of advanced spaceborne thermal emission and reflection radiometer (ASTER) and enhanced thematic mapper plus (ETM+) data. Two targets (Amran limestone as light target and quartz-biotite-sericite-graphite schists as dark target), which were widely exposed and easy to identify in the imagery were selected. The accuracy of the atmospheric correction method was evaluated from three targets (vegetation cover, Amran limestone and Akbra shale) of the surface reflectance. Analytical spectral devices (ASD) FieldSpec3 was used to measure the spectra of target samples. ETM+ data were less influenced by the atmospheric effect when compared to ASTER data. Normalized differences vegetation indices (NDVI) displayed good results with reflectance data when compared with digital number (DN) data because it is highly sensitive to ground truth reflectance (GTR). Most of the differences observed before and after calibration of satellite images (ASTER and ETM+) were absorbed in the SWIR region.

Item Type: Article
Uncontrolled Keywords: ELM and ASTER and ETM+ and GTR and FieldSpec3
Subjects: F Earth Science > Geology
Divisions: Department of > Earth Science
Depositing User: Shrirekha N
Date Deposited: 04 Sep 2019 09:35
Last Modified: 04 Sep 2019 09:35
URI: http://eprints.uni-mysore.ac.in/id/eprint/7532

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