DQRID : D961122.9
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/13/1996000010/09/19962359Incorrect
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Subject:
SGP/EBBR/E12 - Battery Voltage Low - Fluxes Affected
DataStreams:sgp5ebbrE12.b1, sgp15ebbrE12.b1, sgp30ebbrE12.b1
Description:
The battery condition deteriorated over time so that the solar panel was not 
always able to keep the battery voltage high enough to produce correct home 
signal values.  The home 15 signal was too low much of the period above, 
with home 30 being low also occasionally.  The home signal qc checks should 
be consulted to determine which half hour values of sensible (h) and latent (e)
heat fluxes are incorrect; no other data values were affected.  The first 
occurrence of low home 15 signal appears to be 0630 GMT on 13 July 1996.  
Battery voltage did not drop low enough to cause any sensors to stop 
functioning.  The battery was replaced on 9 October 1996 at 2000 GMT, 
during annual calibration changeout of the entire EBBR unit (the mentor 
assumes that the battery was replaced - no instrument maintenance reports 
are available for that time).
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Measurements:sgp15ebbrE12.b1:
  • home_signal
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sgp5ebbrE12.b1:
  • home_signal
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sgp30ebbrE12.b1:
  • home_signal_15
  • sensible_heat_flux
  • latent_heat_flux
  • home_signal_30
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