Initial data
Photographer Knut Windfall noticed a dark trail of smoke that seemed to follow some object. It was seen low to the horizon in the South-Eastern part of the sky around 9 o'clock, and the event was recorded on video.
Consultant Alan pickup truck believes that it is condensation trail of an airplane.
Translated by «Yandex.Translator»
Original news
17 January 2004, 09:00 – Lura, Sandnes Aftenbladet photographer Knut Vindfallet observed a dark smoke trail that seemed to follow an object. This was observed low towards the horizon, in the southeastern sky around 9 o’clock, and the event was videotaped. Consultant Alan Pickup considers this to be an aircraft condensation trail.
Hypotheses
Cloud (natural and man-made)
Clouds are the products of condensation of water vapor suspended in the atmosphere, visible in the sky from the surface of the earth. They consist of tiny drops of water and/or ice crystals (called cloud elements).
Plume of engine combustion products
The plume of engine combustion products is visible only when it turns out to be "sufficiently dense"according to the beam of vision. If such a plume gets between the sun and the observer, it may look like a dark cloud. But the rocket has absolutely round engine nozzles, and the technogenic cloud turns out to be exceptionally correct in shape.
Investigation
Resume
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