HR: 13:50h
AN: A43E-01 INVITED     [Abstracts]
TI: The HIRDLS Saga- Data Recovery and Present Capabilities
AU: * Gille, J
EM: gille@ucar.edu
AF: University of Colorado-CLAS, P.O. Box 3000, Boulder, 80307-3000 United States
AU: * Gille, J
EM: gille@ucar.edu
AF: National Center for Atmospheric Research, P.O. Box 3000, Boulder, 80307-3000 United States
AU: Barnett, J
EM: j.barnett1@physics.ox.ac.uk
AF: Oxford University Department of Physics, Parks Road, Oxford, O1X 3PU United Kingdom
AU: Team, T
EM: gille@ucar.edu
AF: University of Colorado-CLAS, P.O. Box 3000, Boulder, 80307-3000 United States
AU: Team, T
EM: gille@ucar.edu
AF: National Center for Atmospheric Research, P.O. Box 3000, Boulder, 80307-3000 United States
AU: Team, T
EM: gille@ucar.edu
AF: Oxford University Department of Physics, Parks Road, Oxford, O1X 3PU United Kingdom
AU: Team, T
EM: gille@ucar.edu
AF: University of Colorado-LASP, 1234 Innovation Drive, Boulder, 80309 United States
AU: Team, T
EM: gille@ucar.edu
AF: Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX United Kingdom
AU: Team, T
EM: gille@ucar.edu
AF: Colorado Research Associates, 3380 Mitchell Lane, Boulder, 80301 United States
AB: The High Resolution Dynamics Limb Sounder (HIRDLS) instrument was launched on the Aura spacecraft in July 2004. During launch an unknown event occurred to cause a blockage in the optical train of the telescope. This obstructed the view of the Earth's limb and space for all but a fraction of the optical beam width at a single azimuth angle 47 degrees from the orbital plane. It also blocked the view of the in-flight calibrator. In addition, motions of the scan mirror caused the blockage, believed to be a piece of Kapton sheeting used to prevent contamination, to oscillate, modulating the received signal. In order to use the data from this limited aperture, 4 corrections had to be developed, tested, and applied to convert the radiances from the atmosphere and the Kapton into corrected atmospheric radiances that could be input to the original retrieval processor. These corrections were: a revision to the calibration algorithm and procedure; the removal of the signal perturbations due to the Kapton oscillation; removal of the signal coming from the Kapton; and a correction for the effect that only a fractional area is open. The development of these corrections will be descrobed. Retrieved results from the application of these corrections will be presented. They include temperatures and ozone amounts that can be shown by comparison to other measurements to be accurate, have high vertical resolution, and to have a precision of 0.5K and 5%, respectively. Aerosol channel measurements provide maps of PSCA's and cirrus cloud coverage. Retrievals of the other species will also be shown, and some initial scientific applications will be presented.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005