title: Observations of D-region modifications at low and very low frequencies.
authors.affiliation: University of Leicester, Space Environment Laboratory, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Boulder, Colorado 80302, USA.
authors.forename: T B
authors.initials: TB
authors.lastname: Jones
authors.forename: K
authors.initials: K
authors.lastname: Davies
authors.forename: B
authors.initials: B
authors.lastname: Wieder