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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Assessment of the Impact of Various Ionospheric Models on High-Frequency Signal Raytracing

Assessment of the Impact of Various Ionospheric Models on High-Frequency Signal Raytracing

Werner, Joshua T.

Paperback

Technology & EngineeringAstronomy & SpacePhysics

ISBN10: 1288256272
ISBN13: 9781288256273
Publisher: Biblioscholar
Published: Nov 9 2012
Pages: 86
Weight: 0.29
Height: 0.18 Width: 6.14 Depth: 9.21
Language: English

An assessment of the impact of various ionospheric models on high-frequency (HF) signal raytracing is presented. Ionospheric refraction can strongly affect the propagation of HF signals. Consequently, Department of Defense missions such as over-the-horizon RADAR, HF communications, and geo-location all depend on an accurate specification of the ionosphere. Five case studies explore ionospheric conditions ranging from quiet conditions to solar flares and geomagnetic storms. It is shown that an E layer by itself can increase an HF signal's ground range by over 100 km, stressing the importance of accurately specifying the lower ionosphere. It is also shown that the GPSII model has the potential to capture the expected daily variability of the ionosphere by using Total Electron Content data. This daily variability can change an HF signal's ground range by as much as 5 km per day. The upper-ionospheric response to both a solar flare and a geomagnetic storm is captured by the GPSII model. In contrast, the GPSII model does not capture the lower-ionospheric response to either event.

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