Chemical Instrument Test and Evaluation-1

Project Description
The (Chemical Instrument Test and evaluation-1 CITE missions
focused on Ctesting and evaluating the ability of
instrumentation to measure key tropospheric constituents. The
methodology has been the intercomparison of airborne
measurements obtained for the same species by instruments
utilizing fundamentally different detection principles. These
missions provide the instrumentation techniques being employed
during the ABLE (Atmospheric Boundary Layer Experiments)
missions.

The CITE-1 project consisted of one ground-based experiment
(Wallops Island, VA, in 1983) and two expeditions employing the
NASA Convair-990 aircraft (California and the central Pacific
Ocean in Fall 1983, and California and the southwestern U.S. in
Spring 1984). These investigations tested instruments designed
to measure CO, NO, and OH. The instruments were: for CO, a new
laser differential absorption system, together with two proven
gas chromatographs; for NO, an experiment laser-induced
fluorescence (LIF) system and two chemiluminescence (CL)
systems; and for OH, two LIF systems (one lidar-based, one in
situ) and a radiochemical tracer technique.