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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.
## WORKING PAPER NO.17 ## VISUAL OBSERVATION OF SATELLITES Para Page Orbital Period 1 17-1 Inclination 2 17-1 Re-entry 3 17-1 Satellite Brightness 4 17-1 Comparison of Brightness with Stars 5 17-1 Cylindrical and Balloon Satellites 6 17-1 CONDITIONS FOR VIEWING SATELLITES 7 17-1 Earth's Shadow 9 17-2 Repeat Observations 12 17-3 Spells of Visibility 14 17-3 Angles of Elevation 16 17-3 Flash Periods 17 17-3 Sightline Rates 18 17-3
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