2007
DOI: 10.1029/2005rs003326
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Generation of VLF waves in the ionosphere with coherent dual‐site excitation

Abstract: [1] High Power Auroral Stimulation (HIPAS) Observatory and High Frequency Active Auroral Research Program (HAARP) are two radiating facilities in the Arctic region separated by a distance of the order of VLF wavelengths. The current-carrying plasma in the E region of the ionosphere above each facility can be modulated to radiate VLF waves via HF heating. Experiments demonstrated that VLF waves can be coherently excited by these two facilities through constructive interference that is sensitive to the phase dif… Show more

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“…Figures 1–4 show photographs of the EISCAT heating, HAARP, HIPAS, and SPEAR facilities, respectively. The proximity of HAARP and HIPAS, whose separation of 289 km is of the order of a VLF wavelength, has produced coherent excitation of VLF waves when operated together in phase [ Wong et al , 2007].…”
Section: Interactions Of Em Waves With the Ionospherementioning
confidence: 99%
“…Figures 1–4 show photographs of the EISCAT heating, HAARP, HIPAS, and SPEAR facilities, respectively. The proximity of HAARP and HIPAS, whose separation of 289 km is of the order of a VLF wavelength, has produced coherent excitation of VLF waves when operated together in phase [ Wong et al , 2007].…”
Section: Interactions Of Em Waves With the Ionospherementioning
confidence: 99%