SGP/EBBR/E26 - AEM replacement

Please see DQR P950908.2, where this problem was first documented.

On August 26, 1995 at approximately 0345 GMT the gears on the lower sprocket
shaft of the AEM appear to have been damaged, causing the AEM to stop
exchanging.  The home signal values then remained at around -0.5 for both
home_15 and Home_30.  On August 29 site operations personnel removed the fuse
(to prevent exchange) with the left aspirator in the down position.

On 12 September 1995 the AEM was replaced at 1959 GMT (old S/N 92004,
new S/N 92008) and is functioning properly.

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

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.

• Bottom vapor pressure(vapor_pressure_bottom)
• Top relative humidity (fractional)(rh_top_fraction)
• Top T/RH sensor temperature(temp_trh_top)
• Bottom air temperature(temp_air_bottom)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• Top vapor pressure(vapor_pressure_top)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Top air temperature(temp_air_top)

• Bowen ratio(bowen_ratio)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• Top relative humidity (fractional)(rh_top_fraction)
• Top air temperature(temp_air_top)
• Surface latent heat flux(latent_heat_flux)
• Bottom air temperature(temp_air_bottom)
• Top vapor pressure(vapor_pressure_top)
• Top T/RH sensor temperature(temp_trh_top)
• Surface sensible heat flux(sensible_heat_flux)
• Bottom vapor pressure(vapor_pressure_bottom)
• Bottom T/RH sensor temperature(temp_trh_bottom)