Condign volumes 1 to 3

Read from the scan by GLM-OCR; expect the odd misread word.

# UNCLASSIFIED

UK RESTRICTED

other than EM radiation as we currently understand it.

18. For experimental purposes RF energy has been launched using resonant dipole antennas in both E and H orientation $ ^{2} $ . The amount absorbed was greatest at lower RFs (longer wavelengths) and at E field polarisation. However, it is recognised [for the UAP Study of Effects] that it may not be the amount of energy absorbed which causes unexpected brain responses to close encounters with a UAP, but possibly some sort of modulations at much lower energy levels.

19. A wealth of other international experimental measurements (in 18,000 research papers) have been taken using devices which radiate at most RFs, including ELF (c.g. 50Hz). Much of this work is based upon the necessity to understand hazards from, mobiles, AC mains and equipment such as VDUs broadcast stations, etc. It is of interest, in the UAP context, that maximum absorption (and logically the maximum effect is in the human head irrespective of wavelength. See Figure F-1. This also appears to be the case irrespective of human orientation (i.e. facing or side-on to the source). Near-field exposure deposits a far greater rate of absorption in the head than when in the far-field. It is also clear that time-varying electric fields, acting on nerve axons, can given rise to sensory stimulation. Further, the effect will not be the same on every person. Unfortunately, the stress on experimental measurements has always been human (or animal) biological changes, rather than possible neurological effects. It is of interest that at some RFs (e.g. at 900 and 1700MHz) some field focusing occurs in the head and it must be considered that while this may occur at other RFs; it may be some focusing effects or even the occurrence of several interacting frequencies from a UAP which cause the reported effects.

## SUMMARY

20 Because few persons are exposed to the postulated UAP radiation, the following points are pertinent:

There is no history of after-effects of UAP exposure reported beyond feeling unwell for a few hours.

- Unlike other EM radiation sources no cumulative effects are reported or studied.

- It is not certain that the radiation/fields are conventional and electromagnetic in nature.

- No other known (even repeated) exposures to EM radiation (with conventional modulations) causes the loss of time' syndrome reported by many (close encounter) witnesses world wide.