SBS/MET/M1 - Atmospheric pressure spikes

A nearby AC unit was causing +/-.05 (approx.) changes in pressure values, most frequently 
during the daylight hours but occasionally over night.  Corrective action was taken to 
shield the sensor 1/28.

• Barometric Pressure(atmos_pressure)

SBS/MET/M1 - Site setup

The instruments were being setup and installed during this period.  Some data may be 
questionable and minimal quality reporting will be done.

• precip_rate_min
• precip_rate_max
• pwd_err_code
• temp_sd
• time_offset
• relh_sd
• pwd_pw_code_15_min
• Barometric Pressure(atmos_pressure)
• pwd_cumul_snow
• Average 1 min visibility(pwd_avg_vis_1_min)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• pwd_pw_code_1_hr
• wind_spd_arith_min
• pwd_id
• wind_dir_sd
• time
• wind_spd_arith_max
• pwd_avg_H2O_int_1_min
• pwd_pw_code_inst
• alt
• lat
• logger_voltage
• Mean Air Temperature or Hardware Error(temp_mean)
• Vapor pressure mean(vappress_mean)
• Rain, surface, 1-min avg(precip_rate_mean)
• base_time
• Average 10 min visibility(pwd_avg_vis_10_min)
• Relative humidity mean(relh_mean)
• org_carrier_mean
• lon
• vappress_sd
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• pwd_cumul_water
• precip_rate_sd
• logger_temp
• wind_spd_arith_sd

SBS/MET/M1 - Incorrect atmospheric pressure

The atmospheric pressure readings showed a ~.3 - 1 mb oscillatory behavior. The sensor 
tube was found to be obstructed. It was fixed and  proper function resumed.

• Barometric Pressure(atmos_pressure)

SBS/GNDRAD/M1 - IRT bias

The IRT was indicating lower surface temperatures than the PIR. It is unknown how the 
problem was corrected, but there was a concurrent increase in logger voltage of 0.02 V.

• Effective Surface (Skin) Temperature(sfc_ir_temp)
• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)

SBS/GNDRAD/M1 - Upwelling Shortwave data incorrect

Upwelling shortwave signal is flat (0 W/m^2) from 1532 UTC on 2010-09-24 through 1636 UTC 
on 2010-09-28 when it jumps to 600W/m^2. 

Value jumps between 800 W/m^2 and -9999 (missing) until 1833 UTC 2010-09-28.

Signal is adjusted downward ~250 W/m^2 at 2208 UTC on 2010-09-28. 

Data during the specified period are incorrect and cannot be corrected.

• inst_up_short_hemisp

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)

SBS/GNDRAD/M1 - Upwelling longwave initial problems

The Upwelling Longwave signal was not present in the datastreams until 1746 UTC on 
9/23/2010. The signal was then very noisy and frequently above empirical limits (575 W/m^2) 
between 1700 and 2200 UTC until 2208 on 9/28/2010 when it was adjusted upward about 50 W/m^2.

• inst_up_long_hemisp_case_resist
• inst_up_long_hemisp_dome_resist
• inst_up_long_hemisp_tp

• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• inst_up_long_hemisp_dome_temp
• up_long_hemisp_std
• inst_up_long_hemisp_tp
• inst_up_long_hemisp_case_temp

SBS/GNDRAD/M1 - Noise in upwelling LW/SW signals

During these periods the Upwelling Longwave and Upwelling Shortwave signals experience 
wild swings between large negative and large positive values, sometimes going missing 
(-9999) for several hours at a time.

• inst_up_long_hemisp_case_resist
• inst_up_long_hemisp_dome_resist
• inst_up_long_hemisp_tp
• inst_up_short_hemisp

• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• inst_up_long_hemisp_tp
• inst_up_long_hemisp_dome_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• up_long_hemisp_std
• inst_up_long_hemisp_case_temp

SBS/SKYRAD/M1 - Noise in downwelling SW hemispheric

Downwelling Shortwave Hemispheric signal varies wildly between missing (-9999) and large 
positive values over this period.

• inst_global

• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)