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  1. AGU Publications
    https://agupubs.onlinelibrary.wiley.com › …

    Three‐Dimensional Characterization of Global …

    6 天之前 · Thermospheric neutral wind observations from the ICON satellite (Englert et al., 2017; Makela et al., 2020) and simulations from the thermosphere-ionosphere-electrodynamics general circulation model …

    标记:
    Ionosphere
    Library
  2. Springer
    https://link.springer.com › article

    Detection of ionospheric disturbances with a sparse …

    1 天前 · The ionosphere is composed of free ions and electrons at the earth’s outermost atmospheric layer, beginning approximately at 80 km altitude. Changes in the ionosphere’s total electron content ... We expect TID …

    标记:
    Kahramanmaraş
    Flow network
  4. CCMC
    https://ccmc.gsfc.nasa.gov › models

    IRI 2020 | CCMC - NASA

    标记:
    Electron Density
    International Reference Ionosphere
  5. CCMC
    https://ccmc.gsfc.nasa.gov › models

    GITM 21.11 | CCMC - NASA

    标记:
    GITM
    Ionospheric Electrodynamics
  6. CCMC
    https://ccmc.gsfc.nasa.gov › models

    USU-GAIM 2.4.3 | CCMC - NASA

    4 天之前 · Physics-based data assimilation models of the ionosphere were developed at Utah State University as part of a DoD Multidisciplinary University Research Initiative (MURI) program. The USU effort was called Global …

    标记:
    Uniformed Services University of the Health Sciences
    CCMC
  7. pithia-nrf.eu
    https://www.pithia-nrf.eu › news › postdoc-position-in...

    Postdoc position in ionospheric studies using radio astronomical …

    标记:
    Postdoctoral Researchers
    Position
  8. 其他用户还问了以下问题
    What is the physics-based ionosphere forecast model?
    The physics-based model is the Ionosphere Forecast Model (IFM), which is global and covers the E-region, F-region, and topside from 90 to 1400 km. It takes account of five ion species (NO+, O2+, N2+, O+, H+). However, the main output of the model is a 3-dimensional electron density distribution at user specified times.

    USU-GAIM 2.4.3 | CCMC - NASA

    ccmc.gsfc.nasa.gov
    Who developed physics-based data assimilation models of the ionosphere?
    Physics-based data assimilation models of the ionosphere were developed at Utah State University as part of a DoD Multidisciplinary University Research Initiative (MURI) program. The USU effort was called Global Assimilation of Ionospheric Measurements (GAIM).

    USU-GAIM 2.4.3 | CCMC - NASA

    ccmc.gsfc.nasa.gov
    What is an ionospheric storm?
    The response by the ionosphere, a change in electron density in the F region, is called an "ionospheric storm". Ionospheric storms are characterised by greater than normal variations in the highest frequency the F region can refract (MOF).

    SWS - Other Topics - Introduction to HF Radio Propagation

    sws.bom.gov.au
    What is the ionosphere in HF radio communications?
    Of specific interest to High Frequency (HF: 3 to 30 MHz) radio communications via the ionosphere (sky wave) is the process where negatively charged electrons are stripped from atoms and molecules to produce free electrons. While the ionosphere is named after the ions, it is the free electrons which are essential for HF sky wave communications.

    SWS - Other Topics - Introduction to HF Radio Propagation

    sws.bom.gov.au
    Where does ionospheric tilt occur?
    Ionospheric tilting occurs near the equatorial anomalies, the mid-latitude trough, the day-night terminators and when the ionosphere is disturbed due to sudden solar activity. Tilting can cause unusual propagation conditions such as ducting and chordal modes to occur as in Figure 2.4.

    SWS - Other Topics - Introduction to HF Radio Propagation

    sws.bom.gov.au
    How does a TID affect a sky wave path?
    As a TID travels through the refracting region of a sky wave path, the disturbance may change the altitude and angle of refraction, focussing or spreading the signal and altering the wave's footprint (Figure 2.9). Fading periods of the order of 10 minutes or more can be associated with these structures.

    SWS - Other Topics - Introduction to HF Radio Propagation

    sws.bom.gov.au
    反馈
  9. IEEE Xplore
    https://ieeexplore.ieee.org › document

    A Super-resolution Analysis Method for Ionospheric ... - IEEE Xplore

    标记:
    Institute of Electrical and Electronics Engineers
    Radio propagation
  10. ScienceDirect
    https://www.sciencedirect.com › science › article › abs › pii

    Observations of daytime topside ionospheric irregularities in the ...

  11. Space Weather, Australian Bureau of Meteorology
    https://www.sws.bom.gov.au › Educational

    SWS - Other Topics - Introduction to HF Radio …

    6 天之前 · Travelling Ionospheric Disturbances (TIDs) are wave-like features passing through the ionosphere. As a TID travels through the refracting region of a sky wave path, the disturbance may change the altitude and angle of …

    标记:
    Current Hf Propagation
    Hf Ham Radio Propagation Australia
  12. MDPI
    https://www.mdpi.com

    A Study of Lithosphere–Ionosphere Seismic Precursors …

    标记:
    SS Eastern
    Precursor