title: Sampling stratospheric aerosols with impactors.
abstract: Derivation of statistically significant size distributions from impactor samples of rarefied stratospheric aerosols imposes difficult sampling constraints on collector design.  It is shown that is is necessary to design impactors of different size for each range of aerosol size collected as as to obtain acceptable levels of uncertainty with a reasonable amount of data reduction.
authors.affiliation: Space Science Division, Ames Research Center, Moffett Field, CA 94035, USA.
authors.forename: V R
authors.initials: VR
authors.lastname: Oberbeck
mesh_terms: D000336:Aerosols / Q000032:analysis*; D001272:Atmosphere / Q000032:analysis / Q000737:chemistry*; D016010:Binomial Distribution; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods / Q000706:statistics & numerical data*; D004867:Equipment Design; D008855:Microscopy, Electron, Scanning; D015233:Models, Statistical; D010316:Particle Size; D016012:Poisson Distribution; D018401:Sample Size
chemical_list: D000336:Aerosols