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Journal of Applied Remote Sensing • Open Access

Intercomparison in the field between the new WISP-3 and other radiometers (TriOS Ramses, ASD FieldSpec, and TACCS)
Author(s): Annelies Hommersom; Susanne Kratzer; Marnix Laanen; Ilmar Ansko; Martin Ligi; Mariano Bresciani; Claudia Giardino; Jose M. Beltran-Abaunza; Gerald Moore; Marcel R. Wernand; Steef W. Peters

Paper Abstract

Optical close-range instruments can be applied to derive water quality parameters for monitoring purposes and for validation of optical satellite data. In situ radiometers are often difficult to deploy, especially from a small boat or a remote location. The water insight spectrometer (WISP-3) is a new hand-held radiometer for monitoring water quality, which automatically performs measurements with three radiometers (L sky , L u , E d ) and does not need to be connected with cables and electrical power during measurements. The instrument is described and its performance is assessed by an intercomparison to well-known radiometers, under real fieldwork conditions using a small boat and with sometimes windy and cloudy weather. Root mean squared percentage errors relative to those of the TriOS system were generally between 20% and 30% for remote sensing reflection, which was comparable to those of the other instruments included in this study. From this assessment, it can be stated that for the tested conditions, the WISP-3 can be used to obtain reflection spectra with accuracies in the same range as well-known instruments. When tuned with suitable regional algorithms, it can be used for quick scans for water quality monitoring of Chl, SPM, and aCDOM.

Paper Details

Date Published: 12 December 2012
PDF: 22 pages
J. Appl. Rem. Sens. 6(1) 063615 doi: 10.1117/1.JRS.6.063615
Published in: Journal of Applied Remote Sensing Volume 6, Issue 1
Show Author Affiliations
Annelies Hommersom, Stockholm Univ. (Sweden)
Susanne Kratzer, Ames Lab. (Sweden)
Marnix Laanen, Water Insight (Sweden)
Ilmar Ansko, Tartu Observatory (Estonia)
Martin Ligi, Tartu Observatory (Estonia)
Mariano Bresciani, Istituto per il Rilevamento Elettromagnetico dell'Ambiente (Italy)
Claudia Giardino, Istituto per il Rilevamento Elettromagnetico dell'Ambiente (Italy)
Jose M. Beltran-Abaunza, Stockholm Univ. (Sweden)
Gerald Moore, Bio-Optika (United Kingdom)
Marcel R. Wernand, Royal Netherlands Institute for Sea Research (Netherlands)
Steef W. Peters, Water Insight (Netherlands)

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