HR: 13:40h
AN: A53D-01 INVITED     [Abstracts]
TI: An Overview of SAGE III Validation Activities
AU: * Charles, T
EM: Charles.R.Trepte@nasa.gov
AF: NASA Langley Reserach Center, Mail Stop 475, Hampton, VA 23681 United States
AB: The Stratospheric Aerosol and Gas Experiment (SAGE) III satellite mission was launched in December 2001 to provide continued solar occultation measurements of aerosols, ozone, water vapor, and other trace species needed to assess changes to atmospheric composition. The instrument has an advanced design from its predecessors that also permits measurements during lunar occultation events and with a limb scattering mode. The validation effort for this mission has focused primarily on two different approaches. The first emphases matched comparisons between SAGE III and other satellite instruments (e.g., SAGE II, POAM III, and HALOE) and ozonesondes to determine relative biases and precision. The second approach utilizes comprehensive aircraft, balloon, and rocket measurements obtained during the SAGE III Ozone Loss and Validation Experiment (SOLVE) II and Validation of International Satellites and Study of Ozone Loss (VINTERSOL) field experiments in January-February 2003. These data have been used to provide correlative measurements not available from other satellite data sets and to augment match comparisons. Of considerable value is the rich set of aircraft observations from SOLVE II/VINTERSOL that were specifically designed to acquire insight into basic assumptions with the retrieval technique (e.g. constituent homogeneity along the satellite-sun line-of-sight) and assess the quality of spectroscopic information with atmospheric observations (e.g., ozone cross sections in the Wulf band region). This talk will highlight comparison findings for the SAGE III Version 3 dataset from both of these approaches.
DE: 3360 Remote sensing
DE: 1610 Atmosphere (0315, 0325)
DE: 0340 Middle atmosphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting