Re: EMI levels possible due to airborne military jammers?

From:         caf@omen.com (Chuck Forsberg WA7KGX)
Organization: Omen Technology INC
Date:         04 Oct 95 22:57:24 
References:   1 2
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In article <airliners.1995.1530@ohare.Chicago.COM>,
peter (p.j.) ashwood-smith <petera@bnr.ca> wrote:
>>Does anyone have any knowledge of the EMI levels which could be
>>encountered in flight, due to presence of airborne electronic
>>countermeasures (jammers)?   Current engine FADEC's and aircraft avionics
>>are Certified to withstand EMI levels of 200 volts/meter.  Is it possible,
>>assuming normal minimum air traffic control separation distances, that a
>>commercial aircraft could encounter EMI levels greater than the 200
>>volts/meter, if some nearby military aircraft ...

Have you considered EMI from TV and FM stations??  Some of these have
EIRPs in the megawatt range.  Signal combining and weather related lensing
effects could create transient hot spots well beyond expected levels.


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Chuck Forsberg WA7KGX    caf@omen.COM             www.omen.com
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