Accession Number : ADA514936


Title :   DEMETER Observations of ELF Waves Injected With the HAARP HF Transmitter


Descriptive Note : Journal article


Corporate Author : STANFORD UNIV CA SPACE TELECOMMUNICATIONS AND RADIOSCIENCE LAB (STAR)


Personal Author(s) : Platino, M ; Inan, U S ; Bell, T F ; Parrot, M ; Kennedy, E J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a514936.pdf


Report Date : 17 Aug 2006


Pagination or Media Count : 7


Abstract : Modulated HF heating of the auroral electrojet is used to inject ELF signals into the magnetosphere that are observed on the low altitude DEMETER spacecraft. The HF heater is a component of the High-Frequency Active Auroral Research Program (HAARP) facility in Gakona, Alaska, (located at L tilde 4.9). Simultaneous observations of all six components of the ELF electromagnetic fields on the DEMETER spacecraft are used to estimate the total ELF power radiated downward into the Earth-ionosphere waveguide. ELF signals generated by the HAARP heater are also simultaneously observed at a nearby ground-based site, allowing a comparison of the ELF power in the Earth-ionosphere waveguide versus that detected on DEMETER. The estimated values of power onboard DEMETER at different frequencies range from 0.32W to 4W, while the values of power estimated from a ground receiver at a distance of 36 km from HAARP range from 2.71W to 4.22W.


Descriptors :   *HIGH FREQUENCY , *MAGNETOSPHERE , *ELECTROMAGNETIC FIELDS , WAVEGUIDES , SUPERHEATERS , MODULATION , DIPOLE ANTENNAS , LOW ALTITUDE , ELECTROJETS , ALASKA , SPACECRAFT , REPRINTS , RECEIVERS


Subject Categories : Electricity and Magnetism
      Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE