Working Papers 15, 16, and 17: Airships, Hot Air & Tethered Balloons; Sunspot, Aurora and Seismic Correlation; Visual Observation of Satellites

This document consists of a series of working papers (Nos. 15, 16, and 17) issued by the Defence Intelligence Staff (DIS) on January 26, 2000, under the reference DIS Scientific & Technical Memorandum 55/2/00. The primary purpose of these papers is to identify and categorize potential sources of UAP mis-reporting within the United Kingdom. Working Paper No. 15 focuses on man-made objects, specifically meteorological balloons, airships, and tethered balloons. It details the operational procedures of the UK's meteorological radiosonde network, noting that these balloons are released four times daily from eight stations and can reach altitudes of 80,000 feet. The paper suggests that the location of these release points, which are mapped in the document, should be used to eliminate suspected UAP mis-reporting. Furthermore, it discusses the potential for airships and hot air balloons to be misidentified as UAP, particularly due to their size, low altitude, and the use of gas burners at night, which can create the appearance of 'glowing spheres.' Tethered balloons are also noted as a potential source of confusion, especially for observers in moving vehicles. Working Paper No. 16 explores the potential correlation between UAP events and natural phenomena, specifically solar cycles, auroral phenomena, and seismic activity. It notes that while a direct correlation between solar cycles and UAP sightings has not been established, the study of these cycles is considered a candidate for investigation. The paper also examines the hypothesis that seismic strain might produce luminous phenomena, often referred to as 'earthlights,' and suggests that future analysis should correlate UAP databases with fault maps of the UK. Finally, Working Paper No. 17 provides an outline for the visual observation of satellites, though the content for this section is limited to a list of topics such as orbital period, inclination, and conditions for viewing. The document includes several figures, including maps of radiosonde launch sites, design drawings for airships, and various charts illustrating solar cycle data and sunspot numbers. The overall tone is analytical, aiming to provide a framework for filtering out identifiable objects and natural phenomena from the UAP database.