Low Frequency Radio Research at Thule, Greenland.
Abstract
The research reported here started in 1993 following Stanford University's submission of a basic research proposal in response to a February 1992 Broad Agency Announcement (BAA) issued by the Phillips Laboratory at Hanscom Air Force Base. The proposed research involved the upgrade of an ELFIVLF/LF "radiometer" constructed previously by Stanford University for Phillips Laboratory and located at Thule, Greenland, which is essentially at the center of the northern polar cap and which is therefore a unique location for the measurement of ELF/VLF/LF radio signals and noise (frequencies in the range 10 Hz --60kHz). It was proposed that the system would be upgraded by the addition of a new computer with a Stanford-installed digital signal processing capability that would allow the amplitudes and frequency spectra of incoming low-frequency radio signals to be examined in real time either by experimenters on location at Thule or, with slightly less capability, at remote locations via telephone line. We report here the installation of the new computer with its new digital signal processing capability on a system essentially identical to the Thule system but located on the Stanford campus in California, where it was used for measurements during the first transmissions from HAARP, as well as transmissions from HIPAS, during early 1997.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1998
- Accession Number
- ADA360991
Entities
People
- Antony Fraser-Smith
- C. C. Teague
Organizations
- Stanford University