NSA/METTOWER - Questionable NSA Met-tower wind data

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

• 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

• Raw data stream - documentation not supported