The Rise Twilight (Facr) observations on the southern slope of the Great Caucasus (Altitude = 1500 m, Geographical coordinates 4835'04"E / 4046'20"N) 28 May 2006 27 September 2006
The Rise Twilight (Facr) observations on the southern slope of the Great Caucasus (Altitude = 1500 m, Geographical coordinates 4835'04"E / 4046'20"N)
28 May 2006
27 September 2006