Data Quality Reports for Session: 139300 User: zhiyu1wang Completed: 12/14/2011


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020703.2NSA/ORG/C1 - Optical Rain Gauge incorrect at very low temperaturesnsaorgC1.a1, nsaorgC1.b1
D030613.1NSA/PWS/C1 - C1/BARROW PWS WORKING INTERMITTENTLYnsapwsC1.a1, nsapwsC1.b1


DQRID : D020703.2
Start DateStart TimeEnd DateEnd Time
04/01/2001000010/13/20031946
Subject:
NSA/ORG/C1 - Optical Rain Gauge incorrect at very low temperatures
DataStreams:nsaorgC1.a1, nsaorgC1.b1
Description:
The ORG reports precipitation rates that are more than 2 orders of
magnitude greater than those reported by the present weather sensor
when the temperature drops below -25 C.  Examples of this error can
be seen in the data for January 11-13, 2000, however the problem is
not isolated to these days.

A drift occurs when temps are in the range of -25 C to -40 C that
exceeds the maximum drift allowed/expected for the instrument.  The
drift is then reported as precipitation.

The manufacturer of the instrument has not yet been able to identify a
fix for the problem.
Measurements:nsaorgC1.b1:
  • precip_out_of_range_error
  • Precipitation rate(precip_rate)
  • precip_serial_error
  • precip_NWS_code
  • precip_daily_accum
  • precip_read_timeout_error
  • precip_no_data_error

nsaorgC1.a1:
  • precip_NWS_code
  • precip_daily_accum
  • precip_serial_error
  • precip_no_data_error
  • precip_out_of_range_error
  • precip_read_timeout_error
  • Precipitation rate(precip_rate)


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DQRID : D030613.1
Start DateStart TimeEnd DateEnd Time
11/17/2002020004/22/20031918
Subject:
NSA/PWS/C1 - C1/BARROW PWS WORKING INTERMITTENTLY
DataStreams:nsapwsC1.a1, nsapwsC1.b1
Description:
The PWS worked intermittently throughout entire period.  Extensive troubleshooting located 
a broken wire in the RS-232 connector.  Contact was made intermittently allowing some 
data to be recorded.
Measurements:nsapwsC1.a1:
  • ten_min_pw_code_out_of_range_error
  • one_hour_PW_code
  • Precipitation rate(precip_rate)
  • pws_read_timeout_error
  • one_min_pw_code_out_of_range_error
  • one_minute_vis_out_of_range_error
  • Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
  • one_hour_pw_code_out_of_range_error
  • cumul_snow_out_of_range_error
  • pws_serial_error
  • Ten Minute Visibility(ten_minute_visibility)
  • one_minute_PW_code
  • present_weather_sensor_NWS_code
  • ten_minute_PW_code
  • cumul_liq_water_equiv_out_of_range_err
  • One Minute Visibility(one_minute_visibility)
  • Cumulative Snow(cumulative_snow)
  • ten_minute_vis_out_of_range_error
  • precip_rate_out_of_range_error

nsapwsC1.b1:
  • Ten Minute Visibility(ten_minute_visibility)
  • One Minute Visibility(one_minute_visibility)
  • pws_read_timeout_error
  • cumul_snow_out_of_range_error
  • ten_minute_vis_out_of_range_error
  • Cumulative Snow(cumulative_snow)
  • one_min_pw_code_out_of_range_error
  • present_weather_sensor_NWS_code
  • cumul_liq_water_equiv_out_of_range_err
  • one_minute_vis_out_of_range_error
  • one_hour_pw_code_out_of_range_error
  • pws_serial_error
  • one_hour_PW_code
  • ten_minute_PW_code
  • Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
  • one_minute_PW_code
  • ten_min_pw_code_out_of_range_error
  • Precipitation rate(precip_rate)
  • precip_rate_out_of_range_error


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