This study was first funded by the Ministère des Armées/DRET (Direction des Recherches et Techniques) then, on several occasions, by the CNRS/INSU (Institut National des Sciences de l’Univers).
The present prototype was built, partly in the Division Prototype of the Université de Paris 6—Pierre et Marie Curie, and in the Division Projet of the LMD (Laboratoire de Météorologie Dynamique du CNRS).
The Département Aérodynamique of the ONERA (Office National d’Etudes et de Recherches Aérospatiales) gave us very precious help in the aerodynamic definition of the sensor. In addition, the tests in the ONERA wind tunnel of Chalais–Meudon were decisive for our understanding of the acoustic phenomenon limiting sensor performances.
Many encouragements and valuable advice were given by the Division Technique of the INSU, during a lot of test flights performed on board the Fokker 27—ARAT (Avion de Recherche et de Télédétection Atmosphérique). Some of these tests were sometimes very disappointing for us!
For the flights on board the Merlin IV, we would like to acknowledge all the crew and all the team of the Météo France/CNRM/CAM (Centre d’Aviation Météorologique, one facility of the Centre National de Recherches Météorologiques) for their friendly reception and continuous help, as well as for mounting the AUSAT on board of the aircraft, as for processing the data treatment.
Thanks too, to M. Zephoris and J. Villain of the Météo France/SETIM (Service des Equipements et des Techniques Instrumentales de la Météorologie) who permitted us to use not yet published data from their thin-wire thermometer.
Many thanks to B. Piguet of the Météo France/CNRM/GMEI (Groupe de Météorologie Expérimentale et Instrumentale) and D. Picard of the LMD for their help in data processing.
We wish especially to thank A. Druilhet (Laboratoire d’Aérologie of the Université Paul Sabatier de Toulouse) for numerous helpful discussions on signal processing and his constant encouragement.
We gratefully acknowledge the contribution of E. Hicks (Université Antilles-Guyane) in microphysics. The authors also wish to say un grande merci for the constructive input of the anonymous reviewers.
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