Airborne mass spectrometers: four decades of atmospheric and space research at the Air Force Research Laboratory

Chemical ionization mass spectrometric measurements of SO2 emissions from jet engines in flight and test chamber operations

“…The details of both the SNIF-3 flight experiment and the Glenn Research Center test cell experiment have been published in NASA technical reports [Anderson et al, 1998c;Wey et al, 1998]. In this paper, we focus on the details of the chemical ionization mass spectrometer and on the measurements of SO2 concentrations in both experiments.…”

“…Emission indices for SO2 were derived from the SO2 and CO2 concentrations using the same procedure as for SNIF-3. More details of the experimental procedures and data reduc- [Wey et al, 1998]. These tests demonstrate that the EI(SO2) does not depend on engine power or altitude but only on fuel sulfur content.…”

In-situ measurement of smoke particles in the wintertime polar mesosphere between 80 and 85km altitude

“…The presence of negative ions in the mesosphere was demonstrated by rocket-borne mass spectrometers (e.g. Schulte and Arnold, 1992;Viggiano and Hunton, 1999) and also by radar measurements (e.g. Turunen, 1996).…”

Effect of relative humidity on the detection of sulfur dioxide and sulfuric acid using a chemical ionization mass spectrometer

“…In this section, we present only a brief description of the instrument, because it is similar to that previously described in the literature [12,24,26]. Fig.…”

“…The instrument has been used to measure a variety of atmospheric species, including ambient SO 2 [12,24,25]. Here, we used a new version of the spectrometer designed and developed by AFRL, and built by Aerodyne Research, Inc. (ARI).…”