HR: 17:15h
AN: SA14A-06    [Abstracts]
TI: Retrieval of PMC Scattering Phase Functions from Observations by the Cloud Imaging and Particle Size Experiment on the Aeronomy of Ice in the Mesosphere Explorer
AU: * Bailey, S M
EM: scott.m.bailey@vt.edu
AF: Virginia Tech, Bradley Department of Electrical Engineering 302 Whittemore Hall Virginia Tech, Blacksburg, VA 24060, United States
AU: Thomas, G E
EM: gary.thomas@lasp.colorado.edu
AF: Universit of Colorado, Laboratory for Atmospheric and Space Physics 1234 Innovation Dr., Boulder, CO 80303,
AU: Rusch, D W
EM: dave.rusch@lasp.colorado.edu
AF: Universit of Colorado, Laboratory for Atmospheric and Space Physics 1234 Innovation Dr., Boulder, CO 80303,
AU: Randall, C E
EM: cora.randall@lasp.colorado.edu
AF: Universit of Colorado, Laboratory for Atmospheric and Space Physics 1234 Innovation Dr., Boulder, CO 80303,
AU: Jeppesen, C
EM: chris.jeppesen@lasp.colorado.edu
AF: Universit of Colorado, Laboratory for Atmospheric and Space Physics 1234 Innovation Dr., Boulder, CO 80303,
AU: McClintock, W E
EM: bill.mcclintock@lasp.colorado.edu
AF: Universit of Colorado, Laboratory for Atmospheric and Space Physics 1234 Innovation Dr., Boulder, CO 80303,
AU: Merkel, A W
EM: aimee.merkel@lasp.colorado.edu
AF: Universit of Colorado, Laboratory for Atmospheric and Space Physics 1234 Innovation Dr., Boulder, CO 80303,
AU: Russell, J M
EM: james.russell@hamptonu.edu
AF: Hampton University, Center for Atmospheric Sciences 23 Tyler Street, Hampton, VA 23668, United States
AB: The Cloud Imaging and Particle Size (CIPS) instrument on the AIM spacecraft is a 4-camera nadir pointed imager with a bandpass centered at 265 nm and a field of view of 120 by 80 degrees. CIPS observes Polar Mesospheric Clouds (PMCs) against the sunlit Rayleigh-scattered background. At individual polar locations approximately 5km by 5km in area, CIPS observes the same volume of air seven times over a range of scattering angles from about 35 to 150 degrees. These multi-angle observations allow the identification and extraction of the PMC scattered radiance from the Rayleigh-scattered background. The former has a highly asymmetric phase function about 90 degrees scattering angle, while the latter has a phase function that is symmetric about 90 degrees scattering angle. The retrieved PMC phase function can then be interpreted to obtain PMC particle size distributions as well as the PMC absolute albedo. We describe the technique for identification of PMC in the CIPS observations, the separation of the Rayleigh and PMC radiances, and the PMC phase function results from the first season of CIPS observations.
DE: 0319 Cloud optics
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0360 Radiation: transmission and scattering
DE: 0394 Instruments and techniques
DE: 3360 Remote sensing
SC: SPA-Aeronomy [SA]
MN: 2007 Fall Meeting