A new dual-beam technique for precise measurements of spectral reflectance in the field


Milton, E.J., Emery, D.R. and Lawrance, D.J. (2000) A new dual-beam technique for precise measurements of spectral reflectance in the field. In, 28th International Symposium on Remote Sensing of Environment, Cape Town, South Africa, 27 - 31 Mar 2000. Michigan, USA, ERIM.

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Description/Abstract

Field spectral measurements made using the single - beam method often include errors due to variation in illumination between measurement of the target and the
reference (panel or cosine -corrected receptor). Although the dual-beam method avoids these errors, it introduces greater complexity due to the need to intercalibrate the two sensor heads used, and it is significantly more expensive. This paper describes an alternative dual-beam method which uses a neural network to estimate the complete irradiance spectrum from measurements made in 7 narrow bands. These narrow band measurements of irradiance may be made with a simple
filter-based radiometer, thus avoiding the expense and complexity of a second spectroradiometer. The new technique has been tested using irradiance spectra from both continental and maritime locations.

Item Type: Conference or Workshop Item (Paper)
Additional Information: http://www.icrse.org/capetown/home.html CD ROM
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
Divisions: University Structure - Pre August 2011 > School of Geography > Remote Sensing and Spatial Analysis
ePrint ID: 5935
Date Deposited: 21 May 2004
Last Modified: 27 Mar 2014 18:00
URI: http://eprints.soton.ac.uk/id/eprint/5935

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