High-Power Transportable VLF Transmitter Facility
Abstract
A 100-kW, transportable, very-low-frequency (TVLF) transmitter facility has been used for magnetospheric wave-injection experiments from sites in Alaska, New Zealand and Norway. A unique feature of the TVLF facility is the antenna which is a conducting cable lofted to an altitude of 1000 m by a 1000 cu m3 helium balloon. The antenna is driven at its base as a monopole above a ground plane. The antenna cable also serves as the balloon tether. The lowest operating frequency in this configuration is 6.6 kHz at which the radiated power is 100 W. At the highest operating frequency used in the experiments, 21 kHz, the radiated power is 10 kW. In Norway power lines were used as antennas. The minimum operating frequency was then 1 kHz and the radiated power is estimated to be about 0.5 W. In this report we describe the components and performance of the TVLF as used for these magnetospheric experiments.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 25, 1982
- Accession Number
- ADA117419
Entities
People
- Harry C. Koons
- Mitchell H. Dazey
Organizations
- The Aerospace Corporation