HR: 0830h
AN: A51A-04    [Abstracts]
TI: Improvements to SAGE II Level 1 Transmission Product
AU: * Burton, S P
EM: s.p.burton@larc.nasa.gov
AF: Science Applications Int'l Corp., One Enterprise Parkway Suite 300, Hampton, VA 23666 United States
AU: Zawodny, J
EM: j.m.zawodny@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 475, Hampton, VA 23681 United States
AU: Iyer, N
EM: n.iyer@larc.nasa.gov
AF: Science Applications Int'l Corp., One Enterprise Parkway Suite 300, Hampton, VA 23666 United States
AB: In recent years, advances in the SAGE II processing in versions 6.0, 6.1, and 6.2 have produced increasingly robust measurements of stratospheric ozone, nitrogen dioxide, water vapor and aerosol extinction. The processing algorithms continue to be refined, resulting in impressive noise reduction in stratospheric transmission measurements. Most of the new changes relate to the I-zero calibration, which is the normalization of observations of the atmosphere to exo-atmospheric observations. In the enhanced algorithm, more scans are combined to create a finer spatial resolution calibration curve. In addition, an entirely new algorithm has been developed which addresses a previously neglected time dependence of the I-zero function; the time dependence is attributed to rotation of the scan plane over the course of each event. These and other algorithm updates decrease the noise in the unbinned transmission by 40 to 50 percent in the stratosphere. The improvements to the unbinned transmission are expected to generate a more robust binned transmission profile and better species profile products for the next version.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0394 Instruments and techniques
DE: 1640 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly