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Federal
Ionospheric Digital Database
National Oceanic and Atmospheric Administration, Department of Commerce —
The ionosphere is that part of the Earth's atmosphere that results mainly from the photo ionization of the upper atmosphere. Traditionally, the following ionospheric... -
Federal
Worldwide Hourly Values of Ionospheric Characteristics: foF2, M(3000)F2, hF2,FoF1, M(3000)F1, hF, FoE, hE, foE2, hE2, foEs, fbEs, fmI, and FxI
National Oceanic and Atmospheric Administration, Department of Commerce —
The ionosphere is that part of the Earth's atmosphere that results mainly from the ionizing effect of Solar electromagnetic radiation. For poleware latitudes, the... -
Federal
Solar Features - Solar Flares - SIDS
National Oceanic and Atmospheric Administration, Department of Commerce —
A Sudden Ionospheric Disturbance (SID) is any of several radio propagation anomalies due to ionospheric changes resulting from solar or geophysical events. -
Federal
Photographic Records Showing the Variations of the Virtual Height of Reflection as a Function of the Radio Frequency
National Oceanic and Atmospheric Administration, Department of Commerce —
The standard (analog) ionosonde produces photographic records known as ionograms, which show the variations of the virtual height of reflection as a function of the...