NIM/MET/M1/S1 - Reprocess: ORG Data has very small rainrate values

The ORG data is collected via analog signal and not digital.  Therefore, we
   continuously collect data even when no rain is occurring.  We also capture
   small events such as leaves, large bugs, dust, etc blowing through the
   measurement path.  Because this discrete event occurs quickly the value is
   usually captured for 1 or 2 seconds.  This value is then averaged to the
   minute producing rainrate on the order of .009 mm/hr or less.  These values
   are not indicative of rain and should be removed from the record or summing
   over long periods can bias the climate record.  We are reprocessing the data
   to remove these small values and are adjusting the collection program to
   remove them before ingest.

• Rain, surface, 1-min avg(precip_rate_mean)
• precip_rate_sd
• precip_rate_max
• precip_rate_min

NIM/MET/S1 - Wind Speed data contain offset due to induced voltage

The marine model of the RM Young wind sensor needs twisted pair shielded cable.  The 
manufacturer did not originally supply the pigtail with twisted pair shielded cable.  Use of 
twisted pair shielded cable for the rest of the cable run to the logger was also not 
specified.  This caused an induced voltage in the wind speed line from the wind direction 
excitation.  The induced voltage varied from sensor to sensor and probably changed anytime 
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced 
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s.

• wind_spd_arith_min
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• wind_spd_arith_max
• wind_spd_arith_sd

TWP/MET/C3 - Incorrect ORG data

Sprinkler was in the path of the ORG, giving false precipitation data.

• Precipitation mean(precip_mean)
• qc_precip_mean
• qc_precip_max
• qc_precip_min
• precip_std
• Rain, surface, 1-min minimum(precip_min)
• Precipitation maximum(precip_max)

TWP/MET/C2 - T/RH loose connection

Site ops observed abnormal reporting and found a loose connection of the T/RH probe to the 
data logger.

• rh_std
• Temperature mean(temp_mean)
• temp_std
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• vapor_pressure_std

TWP/MET/C1 - Blockage in tipping bucket rain gauge

Debris in the tipping bucket rain gauge caused slow filtration of precip. As a result, the 
tipping mechanism was slow to tip and register timely precipitation values.

• qc_tbrg_count_total
• qc_tbrg_precip_total

TWP/MET/C1 - ORG data unreliable

During this time the optical rain gauge reports precipitation in clear conditions.

Use the present weather detector and/or tipping bucket rain gauge data from this data 
stream, or twpvdisC1.b1 or twprainC1.b1 as references for precipitation data.

• Precipitation maximum(precip_max)
• precip_std
• Rain, surface, 1-min minimum(precip_min)
• Precipitation mean(precip_mean)

TWP/MET/C1 - Incorrect precip data

A blocked syphon caused delays in precipitation recording. The times at which 
precipitation was recorded may be incorrect.

• tbrg_precip_count
• tbrg_precip_total

TWP/MET/C1 - PWD reporting low precipitation

The PWD reported much lower precipitation values than co-located sensors. A mud wasp nest 
was removed from the lens. This may have affected visibility values as well.

• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• pwd_pw_code_inst
• pwd_err_code
• pwd_cumul_rain
• pwd_pw_code_15min
• pwd_pw_code_1hr
• PWD 10 minute mean visibility(pwd_mean_vis_10min)

TWP/MET/C1 - Atmospheric pressure data missing

Atmospheric pressure data is missing during this time. Cause of the outage is unknown.

• Atmospheric pressure(atmos_pressure)

TWP/MET/C1 - PWD not reporting

A wasp nest was obstructing the present weather detector lenses during this time.

• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• pwd_pw_code_inst
• pwd_cumul_rain
• pwd_pw_code_15min
• pwd_pw_code_1hr
• PWD 10 minute mean visibility(pwd_mean_vis_10min)