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Generation of Artificial Acoustic-Gravity Waves and Traveling Ionospheric Disturbances in HF Heating Experiments

Author(s)
Watkins, B. J.; Pradipta, Rezy; Lee, Min-Chang; Cohen, Joel A
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Abstract
We report the results of our ionospheric HF heating experiments to generate artificial acoustic-gravity waves (AGW) and traveling ionospheric disturbances (TID), which were conducted at the High-frequency Active Auroral Research Program facility in Gakona, Alaska. Based on the data from UHF radar, GPS total electron content, and ionosonde measurements, we found that artificial AGW/TID can be generated in ionospheric modification experiments by sinusoidally modulating the power envelope of the transmitted O-mode HF heater waves. In this case, the modulation frequency needs to be set below the characteristic Brunt–Vaisala frequency at the relevant altitudes. We avoided potential contamination from naturally-occurring AGW/TID of auroral origin by conducting the experiments during geomagnetically quiet time period. We determine that these artificial AGW/TID propagate away from the edge of the heated region with a horizontal speed of approximately 160 m/s.
Date issued
2015-02
URI
http://hdl.handle.net/1721.1/105836
Department
Massachusetts Institute of Technology. Space Propulsion Lab
Journal
Earth, Moon, and Planets
Publisher
Springer Netherlands
Citation
Pradipta, R., M. C. Lee, J. A. Cohen, and B. J. Watkins. “Generation of Artificial Acoustic-Gravity Waves and Traveling Ionospheric Disturbances in HF Heating Experiments.” Earth, Moon, and Planets 116, no. 1 (February 7, 2015): 67–78.
Version: Author's final manuscript
ISSN
0167-9295
1573-0794

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