DQRID : D991116.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/08/1999220010/25/19992300Suspect
more
Subject:
NSA/METTOWER - Questionable NSA Met-tower wind data
DataStreams:nsametC1.00, nsamettwrC1.a1
Description:
The data analysis software for the NSA Met_tower system was upgraded at 2200 GMT
on 8 SEP 1999.  The upgrade included replacement of missing data with -99.99's
when the routine that polled the Met-tower sensors timed out.  This 
resulted in large negative spikes in the 1-min averages.  These spikes 
almost always occurred during the first several 1-min periods of a 
half-hour data processing routine.
On 25 OCT 1999 at 2300 the routine that replaced missing data was changed to 
insert the previous 1-min averaged data instead of -99.99.  Since at the most
only one or two values are missing in ay averaging period, this change 
results in a reasonable estimate of the true mean values
Suggestions: 
Measurements:nsamettwrC1.a1:
  • lat
  • win_dir_out_of_range_error
  • atmos_pressure
  • temp_mean
  • filename
  • alt
  • temp_out_of_range_error
  • temp_sd
  • win_spd_out_of_range_error
  • dew_pt_temp_sd
  • vap_pres_min
  • dew_pt_temp_mean
  • atmos_pressure_PTB_serial_error
  • dew_pt_temp_out_of_range_error
  • dew_pt_temp_min
  • wind_spd_max
  • relh_min
  • wind_spd_sd
  • vap_pres_out_of_range_error
  • read_timeout_count
  • vap_pres_max
  • base_time
  • internal_temp_out_of_range_error
  • relh_out_of_range_error
  • atmos_pressure_out_of_range_error
  • relh_mean
  • temp_min
  • wind_dir_max
  • vap_pres_mean
  • wind_spd_vec_avg
  • atmos_pressure_read_timeout_error
  • relh_max
  • dew_pt_hardware_error
  • internal_voltage_out_of_range_error
  • wind_dir_sd
  • vap_pres_sd
  • wind_dir_vec_avg
  • lon
  • relh_sd
  • wind_spd_min
  • wind_spd_mean
  • temp_hardware_error
  • time_offset
  • dew_pt_temp_max
  • wind_dir_min
  • temp_max
more
nsametC1.00:
  • Raw data stream - documentation not supported
more

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