Year = 1999 Month = March Day = 17 Day-of-year = 076 Site = Poker Flat Sunrise = 16:06 Sunset = 03:50 Moonrise = 16:38 Moonset = 02:25 Moon_age = 0 Aurora = Very Quiet - Faint arcs visible at times, far to the north Cloud = Clear early, overcast later Magnetometer = Very quiet 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, good data Bomem = Unknown 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 = Unknown Comments = A very quiet night. SDI data look good early, and are probably ok later too. There was definitely cloud later in the night, and the SDI winds have an interesting shear around then...but the shear signature is one I've seen often before on clear quiet nights at this time. MC, 17-Mar-1999.