NASA Langley Flight Ops Center, Bangor Maine
Atlantic THORpex Regional Campaign
Alliance Icing Research Study II

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    Mission Summary for Dec 11, 2003

    ER-2 and Citation flew an AIRS-II mission to Mirabel. The Citation took off from Bangor at 1519Z, and arrived over Mirabel at 35,000 ft at 1614Z. A spiral descent over the "garage" site was initiated at this time, encountering cloud top at 29,500 ft. The clouds at the high elevations were composed of ice crystals. There were several layers of cloud during the descent, but no liquid water was encountered until an altitude of slightly more than 11,000 ft, where there were small patches of relatively low (less than 0.2 g/m3). The sounding went down to 3,000 ft (T=+2.6C), where there were precipitation sized water drops. The supercooled water was between about 11,000 and 8,000 ft. Horizontal transects were made in 1,000 ft intervals parallel to runway 06/24 between these altitudes and a missed approach from 11,000 ft down to 250 ft. The citation then climbed to 29,000 ft to within an estimated 500 ft of cloud top at 1838Z, The aircraft then landed in Montreal at 1858Z.

    GOES-12 vis image (11 Dec 2003 17:45 Z) showing NASA ER-2 and Univ ND Citation flight tracks

    ER-2 tracks on  visible and infrared image.   Citation tracks on  visible and infrared image.



nasa logo Website address:   http://www-angler.larc.nasa.gov/bangor                 Last Updated:   Nov 10, 2003
Responsible NASA Official:   John Murray   (john.j.murray@nasa.gov)
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