title: Free radicals in the stratosphere: a new observational technique.
abstract: A new approach to in situ observations of trace reactive species in the stratosphere is described. A balloon-borne system, floating 40 kilometers above the earth's surface, successfully lowered and then retracted a cluster of instruments a distance of 12 kilometers on a filament of Kevlar. This instrument cluster is capable of detecting gas-phase free radicals at the part-per-trillion level. The suspended instrument array has excellent stability and has been used to measure atomic oxygen concentrations in the stratosphere.
authors.forename: J G
authors.initials: JG
authors.lastname: Anderson
authors.forename: N L
authors.initials: NL
authors.lastname: Hazen
authors.forename: B E
authors.initials: BE
authors.lastname: McLaren
authors.forename: S P
authors.initials: SP
authors.lastname: Rowe
authors.forename: C M
authors.initials: CM
authors.lastname: Schiller
authors.forename: M J
authors.initials: MJ
authors.lastname: Schwab
authors.forename: L
authors.initials: L
authors.lastname: Solomon
authors.forename: E E
authors.initials: EE
authors.lastname: Thompson
authors.forename: E M
authors.initials: EM
authors.lastname: Weinstock