FKB/MET/M1 - Optical Rain Gauge Data Incorrect

The Optical Raingauge (ORG) data was incorrect during the listed times.  Ice/frost was 
forming on the lenses causing the ORG to believe there was precipitation occurring.

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

FKB/MET/M1 - ORG Data incorrect during calibration

The ORG data was incorrect during calibration checks.  The check mimics a precipiation 
event so the precip amounts that were collected were not actually measured.

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

FKB/MET/M1 - Optical Rain Gauge Data Incorrect

Precipitation was being reported on days with no rain.  Problems with the grounding and 
the orientation of the receiver facing south (sunlight in the optics) caused erroneous 
readings.

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

FKB/MET/M1 - Optical Rain Gage Reporting Precip Constantly

During the time period listed the ORG reported precip consistently.  Reason unknown as 
deployment ended before resolution of problem.

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

FKB/MET/M1 - 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_min
• precip_rate_max
• precip_rate_sd

FKB/MET/M1 - 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
• wind_spd_arith_sd
• wind_spd_arith_max
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• Vector-averaged Wind Speed(wind_spd_vec_avg)