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This is Volume 2 of the Ministry of Defence report 'Unidentified Aerial Phenomena in the UK Air Defence Region', Defence Intelligence Staff Scientific and Technical Memorandum 55/2/00, dated February 2000 and received 7 December 2000. It gathers 25 working papers on natural and man-made phenomena, meant as a reference for analysing UAP reports. The papers cover ball lightning, radar detection, balloons, satellites, mirages, plasma and similar subjects. One paper compares magnetic field experiments on human volunteers with close encounter reports. It concludes that effects from such fields are 'uncannily similar' to what witnesses describe.
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# UNCLASSIFIED UK RESTRICTED Heard as: ShockwavesLow PitchHigh Pitch Microwave Microwave Threshold(mW.cm-2) Radio Frequency(MHz) PRF(Hz) Pulse Duration(μsec) YES ? >60.000 ? ? YES 12 200-3000 50-100 1-100 YES ~2000 Any Any Any Smell YES ? Any [3] Any Taste[4] YES <13.1 Any <1000 Any Felt as: Heat[5] YES ~8.4 30.000 Any Any Shock[2] YES ? Any Any Any Burns YES ? 30.000 Any Any Internal Burns YES ? <3.000 Any Any Paralysis YES ? ~3.000[1] >500 Any ## Table F-1 HUMAN EFFECTS THRESHOLD (U) Notes [1] Reportedly enhanced if >500Hz [2] Electrical shock [3] Reportedly enhances smell [4] >100 $ \mu $ Amp [5] Added to those microwave heating effects can be the effects of IR
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