AJAX
Alpha Jet Atmospheric eXperiment

The Alpha Jet Atmospheric eXperiment (AJAX) is an in situ airborne instrument suite deployed on the Alpha Jet research aircraft. It includes an ozone (O3) monitor, a Picarro greenhouse gas analyzer, a COmpact Formaldehyde FluorescencE Experiment (COFFEE) instrument, and a Meteorological Measurement System (MMS). The O3 monitor, made by 2B Technologies, measures O3 at the 185 nm wavelength within a range of 0-250 ppm and typically samples at 0.5 Hz. The Picarro analyzer uses cavity-ring down spectrometry (CRDS) to measure carbon dioxide (CO2), methane (CH4), and water vapor at 0.3 Hz, operating at 1603 nm for CO2 and 1651 nm for CH4 and water vapor. COFFEE detects formaldehyde (HCHO) at 355 nm with a sampling rate of 1 Hz. MMS records ambient temperature, pressure, and three-dimensional winds at 1 Hz.