DQRID : D950921.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/27/1995161509/14/19951630Incorrect
more
Subject:
SGP/EBBR/E15 - AEM Replaced
DataStreams:sgp5ebbrE15.b1, sgp30ebbrE15.b1
Description:
Please see DQR P950908.1, where this problem was first documented.

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.  On 14 September 1995, site operations personnel replaced
the AEM (serial numbers unknown) and it has operated correctly since then.

The calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for all times during the period listed above.  The data
fields listed below are incorrect:

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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