Year = 1999
Month = January
Day = 21
Day-of-year = 021
Site = Poker Flat
Sunrise = 19:19
Sunset = 00:42
Moonrise = 20:12
Moonset = 05:46
Moon_age = 4
Aurora = Active - One or more breakups occurred
Cloud = Extremely clear all night
Magnetometer = Active
ASC = Long moondown, ran OK
MSP = Ran all night on all channels
VHF_radar = Good data coverage for the entire 24 hours
Electrojet = Good data coverage from real-time calculations
SDI = Ran all night, very good and very interesting data
Bomem = No data
MSG = Unknown
Trailer = Unknown
UW_FPI = Unknown
CRL_NF_FPI = Unknown
CRL_AS_FPI = Unknown
Stratosperic_lidar = Unknown
Rayleigh_lidar = Unknown
Resonance_lidar = Unknown
Ebert = No data
Comments = Beautiful SDI data!  We have 4-minute time resolution data from an isolated substorm just before magnetic midnight.  The wind shifted through 90 degrees in about an hour.
MC, 22-Jan-1999.