title: Some aspects of the optical estimation of microstructure in fog and cloud.
abstract: Indirect measurement of parameters related to the drop size distribution in fog and cloud is discussed. Analysis of the kernel functions in the integral equation relating physical measurements (of transmission, forward scattering, and back scattering, respectively) to the drop size distribution reveals the number of useful independent inferences which can be made, with a specified error in measurement and from a given number of observations.
authors.affiliation: The Naval Research Laboratory, Washington, DC 20390, USA.
authors.forename: S
authors.initials: S
authors.lastname: Twomey
authors.forename: H B
authors.initials: HB
authors.lastname: Howell