DQRID : D980529.15
Start DateStart TimeEnd DateEnd Time
05/06/1998180005/06/19981840
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Subject:
SGP/EBBR/E22 - Six Month Checks
DataStreams:sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1
Description:
During EBBR 6 month checks (formally called 3 month checks) the Automatic 
Exchange Mechanism is disabled (reflected by home signals near zero) so that
the two aspirator units can be placed at the same height.  The measurements
during these periods do not produce correct outputs of bowen ratio (bowen), 
sensible heat flux (h), or latent heat flux (e), nor do the air temperature
and relative humidity measurements indicate correct gradients.  Checks 
performed just before or after the AEM is disabled also lead to some 
incorrect data.  Incorrect 5, 15 minute and half hour data occurs for the 
period indicated.
Suggestions: 
Measurements:sgp15ebbrE22.b1:
  • Right relative humidity (mV)(rh_right_mv)
  • Left air temperature(temp_air_left)
  • Left T/RH sensor temperature (resistance ratio)(temp_trh_left_rr)
  • Left relative humidity (mV)(rh_left_mv)
  • Right air temperature(temp_air_right)
  • Right T/RH sensor temperature (resistance ratio)(temp_trh_right_rr)
more
sgp5ebbrE22.b1:
  • Bottom T/RH sensor temperature(temp_trh_bottom)
  • Top air temperature(temp_air_top)
  • Bottom air temperature(temp_air_bottom)
  • Top T/RH sensor temperature(temp_trh_top)
  • Bottom relative humidity (fractional)(rh_bottom_fraction)
  • Top vapor pressure(vapor_pressure_top)
  • Top relative humidity (fractional)(rh_top_fraction)
  • Bottom vapor pressure(vapor_pressure_bottom)
more
sgp30ebbrE22.b1:
  • Bottom T/RH sensor temperature(temp_trh_bottom)
  • Top air temperature(temp_air_top)
  • Bottom relative humidity (fractional)(rh_bottom_fraction)
  • Surface latent heat flux(latent_heat_flux)
  • Top vapor pressure(vapor_pressure_top)
  • Top T/RH sensor temperature(temp_trh_top)
  • Bottom air temperature(temp_air_bottom)
  • Bottom vapor pressure(vapor_pressure_bottom)
  • Top relative humidity (fractional)(rh_top_fraction)
  • Bowen ratio(bowen_ratio)
  • Surface sensible heat flux(sensible_heat_flux)
more

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