Abstract
The phenomenon of the Green Flash and its temporal and spatial undulations were visually observed with a Questar telescope at sun elevations between 10° and-5°. The undulations in the green cover a typical frequency range between 0.5 and 10 Hz, respectively 5 to 30 arc seconds. Both depend strongly on the local site characteristics. Control observations at 1000 m range with red He-Ne laser light near the same line of sight confirm the temporal frequencies but did not agree with the spatial of behavior. The asymmetry of the target point of the laser light approximates zero, while the asymmetry of the green flashes around the line of sight resembles a horizontally deformed ellipse with an axis ratio around 1/3 to 1/6.
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