Ionospheric <i>D</i> Region: VLF?Measured Electron Densities Compared With Rocket?Based FIRI?2018 Model
نویسندگان
چکیده
Ground-based very low frequency (VLF) radio propagation in the Earth-ionosphere waveguide has enabled extensive electron number densities D region of Earth's ionosphere to be determined, by day typically below heights 70–80 km and night height range ?75–90 km. Many rocket-based density measurements have also been reported literature from ?60 upwards using current probes, at a few MHz between rocket ground. Recently these summarized, supplemented with production-loss modeling, giving rise near global model named FIRI-2018 (Faraday-International Reference Ionosphere) which provides as functions height, latitude (<60°), solar zenith angle F10.7 cm flux. These values are here compared corresponding VLF measurements, low-latitude (?20°) high mid-latitude (?55°), mainly mid-latitudes. At average agreement (over 75–90 km) is remarkably good. By day, fairly good (in common ?60–75 km), changes being moderately comparable. For daytime mid-latitudes, less satisfactory, particularly lowest altitudes, showing expected effects cosmic rays much more than values. Overall, we find that description significant advance on earlier International Ionosphere (IRI-2016) model.
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ژورنال
عنوان ژورنال: Journal Of Geophysical Research: Space Physics
سال: 2022
ISSN: ['2169-9402', '2169-9380']
DOI: https://doi.org/10.1029/2022ja030977