Abstract

A method, using successive approximations, is given for finding the variation of electron density N with height h in the outer ionosphere, when the variation of whistler dispersion with geomagnetic latitude is already known. From the application of the method to specific whistler data, it is inferred that the electron density distribution in the outer ionosphere decreases exponentially with height at least in the height range 1000 to 13,000 km, and that during the period January to May 1957 the equation describing the distribution within this height range was: N = 5.75 × 10 4 exp (− h/2640) where N is in cm −3 and h in km.

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