HIPAS 1987-88: ULF Research and Campaign Support
Abstract
During the October campaign several intervals were noted in which naturally occurring ULF signals were present during Dr. Ferraro's ELF heating experiments. A one-to-one correlation was found between the ULF and ELF polarization characteristics. ULF pulsations are the result of resonant hydromagnetic waves standing in the earth's magnetic field. They drive currents in the ionosphere, primarily at E region heights above 100 km. The heating experiment, which produced ELF returns, heated electrons below 100 km in the D region. The correlation led us to a series of studies of the casual link between the ULF and ELF signals. A second campaign was held during July 1988. In preparation for this campaign, two data acquisition systems were acquired and placed at two sites in Alaska to supplement the Alaska meridian chain of magnetometers. The first system was placed in Tok, Alaska and the second in Coldfoot, Alaska and both were operated continuously during the period of the campaign. These two sites give us measures of the magnetic fields, and hence the ionospheric currents over a two-dimensional region rather than the one dimensional estimate available using only the Alaska meridian chain.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 18, 1989
- Accession Number
- ADA211720
Entities
People
- John V. Olson
Organizations
- University of Alaska Fairbanks