On the Decay of Underdense Radio Meteor Echoes

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Abstract
The discrepancy between the theoretical and observed variations of ambipolar diffusion coefficient with height in the meteor region is re-examined and processes which might be relevant are discussed. We conclude that (i) oxidation of meteoric atoms and their subsequent dissociative recombination with electrons in the lower height region, and (ii) the appearance of secondary reflection points arising from the distortion of the train by irregular winds at greater heights, are likely to be the major sources of difference between theory and experiment. New experimental data consistent with this interpretation are presented.

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