Furthermore atmosphere and ground surface measurements will be performed for validating the instrument
operation in field conditions.
Acknowledgements. This study is part of a project of development of infrared radiometers suitable for
field measurements, which involves the following laboratories: CRG/CNRS (Garchy), ENSPS/GSTS
(Strasbourg), INRA (Avignon) and LOA (Lille). Financial support is provided by the Agence Française de
l'Espace (support to research decision № 93/CNES/0373). We gratefully thank G. Guyot who efficiently
coordinated the various teams. Thanks are extended to J. Legrand, F. Herlemont (LSH, Lille) and B. Sombret
(LAS1R, Lille) for their help in the studies of the instrument detector and optical components, to X. Gu (INRA,
Avignon) for his preliminary study, and to L. Ménenger (LMD, Palaiseau) for his advices about the infrared
measurements.
REFERENCES
[1] : Flamant P., Brogniez G., Desbois M., Fouquart Y., Flobert J.F., Vanhoutte J.C., Nat Singh U., 1989.
High-altitude cloud observations by ground-based lidar, infrared radiometer and Meteosat measurements. Ann.
Geophys., 7: 1-10.
[2] : Legrand M., Bertrand J.J., Desbois M., Menenger L., Fouquart Y., 1989. The potential of infrared satellite
data for the retrieval of Saharan-dust optical depth over Africa. J.Appl. Meteor., 28: 309-318.
[3] : Brossard P., Guyot G., Jackson R.D.,1991. Factors affecting the radiation temperature of a vegetative
canopy. In: Applications of Remote Sensing in Agriculture, M.D. Steven, A. Clark Ed. , pp 45-71.
[4] : Operating and servicing manual for infrared thermometer. Model PRT5 (available from Barnes
Engineering Company. Stanford. CT 06902. USA).
[5] : Heimann KT 17 radiothermometer - Mode d'emploi P1036f (available from Heimann GMBH-Weher
Koppel 6 . Postfach 3007. 6200 Wiesbaden. Germany).
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