SGP/MET/E9 - Time-stamp uncertainty

Between 20100503 and 20100507 the sgp.E9 instruments (EBBR, MET, SIRS, SWATS) time clocks 
were drifting outside the allowable +/-3 seconds.  During the specified period, the 
swings ranged from -326 to +637 seconds.

null

• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Wind direction vector mean standard deviation(wdir_vec_std)
• Time offset from base_time(time_offset)
• Quality check results on field: Wind speed arithmetic mean(qc_wspd_arith_mean)
• Quality check results on field: Relative humidity mean(qc_rh_mean)
• Quality check results on field: TBRG precipitation total, corrected(qc_tbrg_precip_total_corr)
• Quality check results on field: Wind direction vector mean(qc_wdir_vec_mean)
• Atmospheric pressure(atmos_pressure)
• Temperature mean(temp_mean)
• Quality check results on field: TBRG precipitation total(qc_tbrg_precip_total)
• TBRG precipitation total(tbrg_precip_total)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Quality check results on field: Temperature mean(qc_temp_mean)
• Quality check results on field: Atmospheric pressure(qc_atmos_pressure)
• Quality check results on field: Vapor pressure mean, calculated(qc_vapor_pressure_mean)
• Quality check results on field: Wind direction vector mean standard deviation(qc_wdir_vec_std)
• base time in epoch(base_time)
• Quality check results on field: Wind speed vector mean(qc_wspd_vec_mean)
• Relative humidity observed by the Raman lidar(rh_mean)
• Results of quality checks on sample time(qc_time)
• Wind speed arithmetic mean(wspd_arith_mean)
• time_in_seconds_since_volume_start(time)