Phase I and Phase II will result in an instrument for measurement of carbonyl sulfide that could be used by NASA to measure this important sulfur species from airborne platforms or in ground-based studies. The instrument platform could be adapted for measurement of other atmospheric species (including carbon monoxide, hydrocarbon gases, water vapor, carbon dioxide, and other sulfur species). This type of instrumentation is of interest to other government agencies involved in atmospheric research, including NOAA, the Department of Energy, and NSF-supported institutions such as NCAR. The instrumentation, if adapted for measurement of pollutant gases, could be of interest to EPA and industrial customers concerned with pollutant monitoring and control. Southwest Sciences intends to manufacture and sell instrumentation based on the project technology to NASA, other government agencies, and the general atmospheric research and evironmental monitoring communities.