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Sensors 2009, 9(3), 1409-1422; doi:10.3390/s90301409

Automated Directional Measurement System for the Acquisition of Thermal Radiative Measurements of Vegetative Canopies

1
International Institute for Geo-Information Sciences and Earth Observation (ITC) / Hengelosestr. 99, P.O. Box 6, 7500 AA Enschede, the Netherlands
2
National Aerospace Laboratory (NLR) / NLR Amsterdam, Anthony Fokkerweg 2, 1059 CM, Amsterdam, the Netherlands
*
Author to whom correspondence should be addressed.
Received: 9 January 2009 / Revised: 25 February 2009 / Accepted: 3 March 2009 / Published: 3 March 2009
(This article belongs to the Section Remote Sensors)
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Abstract

The potential for directional optical and thermal imagery is very large. Field measurements have been performed with a goniometer on which thermal instruments were attached. In order to reduce dynamical effects the goniometer was adjusted to run in automated mode, for zenith and azimuthal direction. Directional measurements were performed over various crops with increasing heterogeneity. The improvements to the goniometer proved successful. For all the crops, except the vineyard, the acquisition of the directional thermal brightness temperatures of the crops went successfully. The large scale heterogeneity of the vineyard proved to be larger then the goniometer was capable of. The potential of directional thermal brightness temperatures has been proven. View Full-Text
Keywords: Thermal; Directional; Brightness; Temperatures; Goniometer Thermal; Directional; Brightness; Temperatures; Goniometer
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Timmermans, J.; Ambro Gieske, A.; Van der Tol, C.; Verhoef, W.; Su, Z. Automated Directional Measurement System for the Acquisition of Thermal Radiative Measurements of Vegetative Canopies. Sensors 2009, 9, 1409-1422.

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