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The missile plume can be considered a cold plasma. If a radio signal passes across the plume it's attenuated. Obviously the attenuation depends on the frequency of the signal. Where can I find some information about the behaviour of the RF across the cold plasma? Thanks

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  • $\begingroup$ It isn't really related to "cold plasma". The attenuation of RF signals by rocket exhaust is due to free electrons in the plume, which are formed primarily by ionization of sodium and potassium or alkali metals. Sodium and potassium are present as contaminants usually ammonium perchlorate. $\endgroup$
    – user6972
    Commented Mar 26, 2014 at 17:38

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Take a look at:

A Simple Method for Predicting RF Attenuation Through a Rocket Exhaust Plume

and

Radio Propagation through Rocket Exhaust Jets

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