Data Quality Reports for Session: 109561 User: gaustad Completed: 12/27/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D991116.1NSA/METTOWER - Questionable NSA Met-tower wind datansametC1.00, nsamettwrC1.a1
D991116.2NSA/METTOWER - Questionable NSA Met-tower wind datansametC1.00, nsamettwrC1.a1
D991129.1NSA/METOWER - Reprocess: Incorrect NSA wind direction minima and maximansametC1.00, nsamettwrC1.a1


DQRID : D991116.1
Start DateStart TimeEnd DateEnd Time
09/08/1999220010/25/19992300
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
Measurements:nsamettwrC1.a1:
  • Minimum Dew Point Temperature(dew_pt_temp_min)
  • Wind Speed out of range error(win_spd_out_of_range_error)
  • Mean Dew Point Temperature(dew_pt_temp_mean)
  • Wind Direction out of range error(win_dir_out_of_range_error)
  • Vector-averaged Wind Direction(wind_dir_vec_avg)
  • base time(base_time)
  • Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
  • Number of timeouts reading the met tower data by height(read_timeout_count)
  • Maximum Wind Direction(wind_dir_max)
  • Air Temperature Hardware Error(temp_hardware_error)
  • Time offset of tweaks from base_time(time_offset)
  • PTB Serial Error(atmos_pressure_PTB_serial_error)
  • Barometric Pressure(atmos_pressure)
  • Read Timeout Error(atmos_pressure_read_timeout_error)
  • Air Temperature out of range error(temp_out_of_range_error)
  • Minimum Wind Speed(wind_spd_min)
  • Std Dev of Dew Point Temperature(dew_pt_temp_sd)
  • Relative humidity minimum(relh_min)
  • Minimum Wind Direction(wind_dir_min)
  • Maximum Wind Speed(wind_spd_max)
  • Vapor Pressure out of range error(vap_pres_out_of_range_error)
  • lon(lon)
  • lat(lat)
  • Std Dev of Wind Speed(wind_spd_sd)
  • Std Dev of Air Temperature(temp_sd)
  • Minimum Vapor Pressure(vap_pres_min)
  • Std Dev of Vapor Pressure(vap_pres_sd)
  • Internal Temperature out of range error(internal_temp_out_of_range_error)
  • Relative humidity maximum(relh_max)
  • GPS raw data filename(filename)
  • Mean Relative Humidity(relh_mean)
  • Maximum Vapor Pressure(vap_pres_max)
  • Relative Humidity out of range error(relh_out_of_range_error)
  • Temperature maximum(temp_max)
  • Mean Vapor Pressure(vap_pres_mean)
  • Vector-averaged Wind Speed(wind_spd_vec_avg)
  • Temperature minimum(temp_min)
  • Std Dev of Wind Direction(wind_dir_sd)
  • Mean Wind Speed(wind_spd_mean)
  • Maximum Dew Point Temperature(dew_pt_temp_max)
  • Dummy altitude for Zeb(alt)
  • Dew Point Temperature Hardware Error(dew_pt_hardware_error)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Out of Range Error(atmos_pressure_out_of_range_error)
  • Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
  • Internal Voltage out of range error(internal_voltage_out_of_range_error)
nsametC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D991116.2
Start DateStart TimeEnd DateEnd Time
09/08/1999220011/15/19992200
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 insertion of  -99.99's for the wind vectors 
when the wind speed or direction were either missing or equal to 0.  This 
resulted in incorrect vector averaged wind speed, wind direction, and 
standard deviation of wind direction.  When this occurred, the 
vector-averaged wind speed and standard deviation of wind direction 
were often abnormally high and the vector-averaged wind direction
 was often approximately 225 deg.  Starting at 2300 GMT on 25 OCT 99
missing wind data were replaced by the previous 1-min average and 
starting at 2200 GMT on 15 NOV 1999 the computed wind vectors were 
used whenever wind speeds or wind directions were 0.
Measurements:nsamettwrC1.a1:
  • Minimum Dew Point Temperature(dew_pt_temp_min)
  • Wind Speed out of range error(win_spd_out_of_range_error)
  • Mean Dew Point Temperature(dew_pt_temp_mean)
  • Wind Direction out of range error(win_dir_out_of_range_error)
  • Vector-averaged Wind Direction(wind_dir_vec_avg)
  • base time(base_time)
  • Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
  • Number of timeouts reading the met tower data by height(read_timeout_count)
  • Maximum Wind Direction(wind_dir_max)
  • Air Temperature Hardware Error(temp_hardware_error)
  • Time offset of tweaks from base_time(time_offset)
  • PTB Serial Error(atmos_pressure_PTB_serial_error)
  • Barometric Pressure(atmos_pressure)
  • Read Timeout Error(atmos_pressure_read_timeout_error)
  • Air Temperature out of range error(temp_out_of_range_error)
  • Minimum Wind Speed(wind_spd_min)
  • Std Dev of Dew Point Temperature(dew_pt_temp_sd)
  • Relative humidity minimum(relh_min)
  • Minimum Wind Direction(wind_dir_min)
  • Maximum Wind Speed(wind_spd_max)
  • Vapor Pressure out of range error(vap_pres_out_of_range_error)
  • lon(lon)
  • lat(lat)
  • Std Dev of Wind Speed(wind_spd_sd)
  • Std Dev of Air Temperature(temp_sd)
  • Minimum Vapor Pressure(vap_pres_min)
  • Std Dev of Vapor Pressure(vap_pres_sd)
  • Internal Temperature out of range error(internal_temp_out_of_range_error)
  • Relative humidity maximum(relh_max)
  • GPS raw data filename(filename)
  • Mean Relative Humidity(relh_mean)
  • Maximum Vapor Pressure(vap_pres_max)
  • Relative Humidity out of range error(relh_out_of_range_error)
  • Temperature maximum(temp_max)
  • Mean Vapor Pressure(vap_pres_mean)
  • Vector-averaged Wind Speed(wind_spd_vec_avg)
  • Temperature minimum(temp_min)
  • Std Dev of Wind Direction(wind_dir_sd)
  • Mean Wind Speed(wind_spd_mean)
  • Maximum Dew Point Temperature(dew_pt_temp_max)
  • Dummy altitude for Zeb(alt)
  • Dew Point Temperature Hardware Error(dew_pt_hardware_error)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Out of Range Error(atmos_pressure_out_of_range_error)
  • Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
  • Internal Voltage out of range error(internal_voltage_out_of_range_error)
nsametC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D991129.1
Start DateStart TimeEnd DateEnd Time
03/24/1998000011/29/19992000
Subject:
NSA/METOWER - Reprocess: Incorrect NSA wind direction minima and maxima
DataStreams:nsametC1.00, nsamettwrC1.a1
Description:
From the time of installation of the NSA C1 Met-tower system on 24 MAR 1998
until 29 NOV 1999 all wind direction minima and maxima were reported as raw
(unrotated) data.  In order to obtain correct minima and maxima 30 deg must
be subtracted from the value.  All mean wind directions were computed from
rotated (corrected) data.
Measurements:nsamettwrC1.a1:
  • Minimum Dew Point Temperature(dew_pt_temp_min)
  • Wind Speed out of range error(win_spd_out_of_range_error)
  • Mean Dew Point Temperature(dew_pt_temp_mean)
  • Wind Direction out of range error(win_dir_out_of_range_error)
  • Vector-averaged Wind Direction(wind_dir_vec_avg)
  • base time(base_time)
  • Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
  • Number of timeouts reading the met tower data by height(read_timeout_count)
  • Maximum Wind Direction(wind_dir_max)
  • Air Temperature Hardware Error(temp_hardware_error)
  • Time offset of tweaks from base_time(time_offset)
  • PTB Serial Error(atmos_pressure_PTB_serial_error)
  • Barometric Pressure(atmos_pressure)
  • Read Timeout Error(atmos_pressure_read_timeout_error)
  • Air Temperature out of range error(temp_out_of_range_error)
  • Minimum Wind Speed(wind_spd_min)
  • Std Dev of Dew Point Temperature(dew_pt_temp_sd)
  • Relative humidity minimum(relh_min)
  • Minimum Wind Direction(wind_dir_min)
  • Maximum Wind Speed(wind_spd_max)
  • Vapor Pressure out of range error(vap_pres_out_of_range_error)
  • lon(lon)
  • lat(lat)
  • Std Dev of Wind Speed(wind_spd_sd)
  • Std Dev of Air Temperature(temp_sd)
  • Minimum Vapor Pressure(vap_pres_min)
  • Std Dev of Vapor Pressure(vap_pres_sd)
  • Internal Temperature out of range error(internal_temp_out_of_range_error)
  • Relative humidity maximum(relh_max)
  • GPS raw data filename(filename)
  • Mean Relative Humidity(relh_mean)
  • Maximum Vapor Pressure(vap_pres_max)
  • Relative Humidity out of range error(relh_out_of_range_error)
  • Temperature maximum(temp_max)
  • Mean Vapor Pressure(vap_pres_mean)
  • Vector-averaged Wind Speed(wind_spd_vec_avg)
  • Temperature minimum(temp_min)
  • Std Dev of Wind Direction(wind_dir_sd)
  • Mean Wind Speed(wind_spd_mean)
  • Maximum Dew Point Temperature(dew_pt_temp_max)
  • Dummy altitude for Zeb(alt)
  • Dew Point Temperature Hardware Error(dew_pt_hardware_error)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Out of Range Error(atmos_pressure_out_of_range_error)
  • Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
  • Internal Voltage out of range error(internal_voltage_out_of_range_error)
nsametC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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