HR: 0830h
AN: A21A-18    [Abstracts]
TI: Stray Light Corrections in Measurements of Limb Scattered Sunlight
AU: * Hornstein, J
EM: John.Hornstein@nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Avenue, Washington, DC 20375 United States
AU: Lumpe, J
EM: Lumpe@cpi.com
AF: Computational Physics, Inc., 8001 Braddock Road, Springfield, VA 22151 United States
AU: Bergman, J
EM: jbergman@cpi.com
AF: Computational Physics, Inc., 8001 Braddock Road, Springfield, VA 22151 United States
AU: Remund, Q
EM: qremund@ball.com
AF: Ball Aerospace & Technologies Corp., P.O. Box 1062, Boulder, CO 80306 United States
AB: Measuring limb scattered sunlight has recently become a popular way of determining the vertical distribution of ozone and other atmospheric constituents. Limb scattering measurements provide broader geographic coverage than solar occultation techniques and almost as good vertical resolution. Many of the new and near future limb scatter instruments are spectral imagers. Stray light is often a significant problem for such instruments because of the large vertical and spectral contrasts in the intensity of limb scattered sunlight. In principle, stray light can be corrected for in spectral imager data by using pre-launch measurements of the impulse response functions of the electro-optical system. The impulse response functions can be determined from laboratory measurements of the instrument's point spread functions and thoughput. We discuss two techniques for using the impulse response functions to correct for stray light: (1) correcting the radiances before inverting the data for the atmospheric constituent profiles, and (2) using the impulse response functions directly in the inversion for the atmospheric constituent profiles. We present results for the first of these methods.
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly