Analysis of the relationship between LF reflection coefficients and D-region profiles. Technical memo
In calculating D region electron density profiles from LF reflection coefficient measurements, it is important to order those measurements according to depth of penetration into the ionosphere. A ray theory analysis, a set of full-wave reflection coefficient calculations, and reflection coefficient measurements support the approximation that those waves with the larger equivalent frequency f(cos/sup 2/i/sub 0/) (where f is the wave frequency and i/sub 0/ is the angle of incidence on the ionosphere) will penetrate further into the ionosphere. This approximation is more accurate for those waves that reflect below the height where the collision frequency equals the gyrofrequency (about 65 km at midlatitudes), where the earth's magnetic field has negligible effect.
- Research Organization:
- National Oceanic and Atmospheric Administration, Boulder, CO (USA). Wave Propagation Lab.
- OSTI ID:
- 6734608
- Report Number(s):
- PB-276387; NOAA-TM-ERL-WPL-29
- Country of Publication:
- United States
- Language:
- English
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