Abstract
Electron density profiles from nine daytime rocket flights at Wallops Island, Va., conducted by the University of Illinois at high and low levels of solar activity, are compared with profiles calculated by inversion of ionograms obtained at the same times and location. Sources of error and uncertainty in the ionogram inversion are discussed, as are means for their amelioration. In most cases, agreement between the two kinds of measurement within a few percent in electron density and within a few percent of a scale height can be achieved.
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