A COMPARISON OF OZONE MEASUREMENTS MADE BY THE ATMOS, MAS, AND SSBUV INSTRUMENTS DURING ATLAS-1, ATLAS-2, AND ATLAS-3

Ozone profile measurements were made by three instruments, ATMOS, MAS, and SSBUV, using distinctly different observing techniques, as part o f the ATLAS Space Shuttle missions in March 1992, April 1993, and Nove mber 1994. ATMOS makes solar-occultation observations of infrared spec tra using a Fourier transform interferometer. MAS uses a limb-scanning antenna to measure emission spectra at millimeter wavelengths. SSBUV is a nadir-viewing instrument measuring the transmission of scattered solar ultraviolet radiation modified by ozone absorption. A sample of zonal-mean mixing ratio profiles indicates that these three ATLAS inst ruments generally agree to within 10%, although a few potential biases have been noted. There are significant differences in the character o f the agreement between ATLAS 1 and ATLAS 2 which will require further study.