Year = 2008
Month = December
Day = 25
Day-of-year = 360
Site = Poker_Flat
Sunrise = 20:10
Sunset = 23:29
Moonrise = None
Moonset = None
Moon_age = 27
Aurora = Disturbed - Arcs reached the zenith for significant periods
Cloud = Diffuse or hazy cloud, but sky features discernable at most times
Magnetometer = Disturbed
ASC = Unknown
Digital_ASC = Ran all night, good data
MSP = Ran all night on all channels
SDI = Ran all night, good data
Comments = MSP and ASC show that there was at least thin cloud covering the sky early in the evening, but it cleared a bit later. Nevertheless, some clouds continued to pass over for most of the night. The ASC showed substantial snow accumulation around the edge of the dome; presumably this was drifting rather than falling. Despite the thin cloud and snow, the SDI data look ok.
MC