title: Pioneer 11 meteoroid detection experiment: preliminary results.
abstract: The concentration of meteoroids of mass ~ 10(-8) gram in interplanetary space, in the asteroid belt, and near Jupiter has been measured. The data confirm the Pioneer 10 observation that the asteroid belt is not highly populated with small meteoroids, suggest that the high concentration of small particles around Jupiter is the result of gravitational focusing, and provide an indication of the mass distribution of meteoroids in interplanetary space.
authors.forename: D H
authors.initials: DH
authors.lastname: Humes
authors.forename: J M
authors.initials: JM
authors.lastname: Alvarez
authors.forename: W H
authors.initials: WH
authors.lastname: Kinard
authors.forename: R L
authors.initials: RL
authors.lastname: O'neal