DQRID : D950908.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/27/1995161509/14/19951600Incorrect
more
Subject:
SGP/EBBR/E15 - AEM Not Exchanging
DataStreams:sgp5ebbrE15.b1, sgp30ebbrE15.b1
Description:
On August 27, 1995 at approximately 1615 GMT the upper sprocket shaft of the AEM
broke in two, causing the AEM to stop exchanging.  The home signal values
then remained at around 22 for both home_15 and Home_30.  On August 28 site
operations personnel removed the fuse (to prevent exchange) with the left
aspirator in the down position.  The home signal values remained around
-2.3 after that. The AEM will remain in this condition until a replacement
is available.

Therefore, the calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for all times after August 27, 1995 at 1615 GMT.  The data
fields listed below are incorrect after this time:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top,
           hum_bot, vp_top, vp_bot, Bowen, e, h

It is not possible to reliably calculate the Bowen ratio, e, and h using the
15 minute data.
Suggestions: 
Measurements:sgp5ebbrE15.b1:
  • temp_trh_top
  • temp_air_top
  • vapor_pressure_bottom
  • rh_top_fraction
  • temp_air_bottom
  • vapor_pressure_top
  • rh_bottom_fraction
  • temp_trh_bottom
more
sgp30ebbrE15.b1:
  • temp_air_bottom
  • vapor_pressure_bottom
  • vapor_pressure_top
  • latent_heat_flux
  • sensible_heat_flux
  • rh_top_fraction
  • temp_trh_bottom
  • temp_air_top
  • rh_bottom_fraction
  • temp_trh_top
  • bowen_ratio
more

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