SGP/EBBR/E20 - Aspirator Fan Stoppage

During Site Operations Preventative Maintenance activities the left AEM fan
stopped operating.  This affected some of the data being collected.  The
times of incorrect values are listed below.

15 minute: 1530-1715 GMT; tair_l, mv_hum_l, rr_thum_l
30 minute: 1530-1730 GMT; thum_top, thum_bot, tair_top, tair_bot, hum_top,
                          hum_bot, e, h, bowen

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

• Left air temperature(temp_air_left)
• Left relative humidity (mV)(rh_left_mv)
• Left T/RH sensor temperature (resistance ratio)(temp_trh_left_rr)