DQRID : D120522.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/12/1998000005/01/19980000Suspect
more
Subject:
TWP/QCRAD/C1 - Spikes in temperature data
DataStreams:twpqcrad1longC1.s1, twpqcrad1longC1.c1, twpqcrad1longC1.s2, twpqcrad1longC1.c2
Description:
Beginning on 980212 (day #43) spikes began to occur in the surface temperature and water 
vapor pressure.  These spikes occur approximately once per hour (the spacing is very 
regular but occasionally an hour is skipped).  In the one-minute averaged data, the 
temperature spike lasts for only one minute and dips approximately 4-5 C below the actual 
temperature.  The one-minute standard deviation is more dramatic, rising from about 0.1 to about 
35.  The one minute temperature minimum is the most easily identifiable, each hour when 
the spike occurs, the minimum is -245.84.  The vapor pressure mean jumps from about 30 to 
over 50 and the standard deviation jumps from less than 1 to more than 200. This
problem was fixed by the RESET team on 980501.

Air temperature data is needed for tests on LW up and LW down pyrgeometer case and dome 
temperatures, and tests on the irradiances from upwelling LW/SW and downwelling LW.

Problem documented in instrument DQR D000718.11
Suggestions: 
Use caution with upwelling LW/SW and downwelling LW because not all checks can be 

performed on data.
Measurements:twpqcrad1longC1.s1:
  • up_long_hemisp
  • up_short_hemisp
  • down_long_hemisp
  • Temp_Air
more
twpqcrad1longC1.c1:
  • down_long_hemisp
  • up_long_hemisp
  • Temp_Air
  • up_short_hemisp
more
twpqcrad1longC1.c2:
  • up_long_hemisp
  • Temp_Air
  • up_short_hemisp
  • down_long_hemisp
more
twpqcrad1longC1.s2:
  • up_short_hemisp
  • Temp_Air
  • down_long_hemisp
  • up_long_hemisp
more

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