Airborne digital holographic system for cloud particle measurements |
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Authors: | Fugal Jacob P Shaw Raymond A Saw Ewe Wei Sergeyev Aleksandr V |
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Affiliation: | Department of Physics, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, USA. |
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Abstract: | An in-line holographic system for in situ detection of atmospheric cloud particles [Holographic Detector for Clouds (HOLODEC)] has been developed and flown on the National Center for Atmospheric Research C-130 research aircraft. Clear holograms are obtained in daylight conditions at typical aircraft speeds of 100 m s(-1). The instrument is fully digital and is interfaced to a control and data-acquisition system in the aircraft via optical fiber. It is operable at temperatures of less than -30 degrees C and at typical cloud humidities. Preliminary data from the experiment show its utility for studies of the three-dimensional spatial distribution of cloud particles and ice crystal shapes. |
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