منابع مشابه
An interhemispheric model of artificial ionospheric ducts
[1] A duct in Earth’s ionosphere is characterized by density gradients perpendicular to the magnetic field, which enhance refractive indices and act as waveguides to whistler-range waves. Interhemispheric ducts along magnetic field lines have implications for the transmission of ELF radio waves across the globe. Strong HF ionospheric heating has been shown to create a depletion of electrons at ...
متن کاملModel for artificial ionospheric duct formation due to HF heating
[1] Strong electron heating by the injection of highly powerfu l HF waves can lead to the format ion of ionospheric plasma density perturbations that stretch along the magnetic field lines. Those density perturbations can serve as ducts for guiding natural and artificial ELF/VLF waves. This paper presents a theoretical model of duct formation due to HF heating of the ionosphere. The model is ba...
متن کاملFocusing of HF radio-waves by ionospheric ducts
This paper presents the first direct observations of HF focusing induced by natural and artificial ionospheric ducts along with a simple theoretical model. The experiments were conducted by injecting HF radio-waves using the Ionospheric Research Instrument of the High Frequency Active Auroral Research Program located in Gakona, Alaska and detecting them with instruments on the overflying French...
متن کاملCreation of artificial ionospheric layers using high - power HF waves
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متن کاملIonospheric path delay modelling for spacecraft formation flying
In addition to absolute orbit determination information, many current and future space missions require onboard relative navigation solutions between multiple satellites. GNSS is ideal for satisfying such requirements because of its long-term stable accuracy and global availability. It is well known that of the various error sources in the GNSS observations, the ionospheric path delay is one of...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2008
ISSN: 0094-8276
DOI: 10.1029/2008gl034630