SGP/SMOS/E3 - E3 SMOS SNOW DEPTH DATA INCORRECT

Data incorrect due to new program reading sensor input when no sensor installed.  Values 
read around 1539 mm.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Time of Maximum Snow Depth(time_max_snow)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

SGP/SMOS/E7 - E7 SMOS SNOW DEPTH DATA INCORRECT

Data incorrect due to new program reading sensor input when no sensor installed.  Values 
read near 1539 mm.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

• Time of Maximum Snow Depth(time_max_snow)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)

SGP/SMOS/E3 - E3 SNOW DEPTH DATA QUESTIONABLE

Snow depth sensor intermittently reporting values outside the manufacturers tolerance of 
+/- 25mm.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Time of Maximum Snow Depth(time_max_snow)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

SGP/SMOS/E3 - E3 SNOW DEPTH DATA VALUES INCORRECT

Snow depth readings are outside the manufacturer's tolerance of +/- 25mm.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Time of Maximum Snow Depth(time_max_snow)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

SGP/SMOS/E3 - E3 SNOW DEPTH READINGS QUESTIONABLE

Snow depth readings reporting intermittently as: -9999, outside the manufacturer's 
tolerance of +/- 25mm, and beleivable values.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Time of Maximum Snow Depth(time_max_snow)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

SGP/SMOS/E7 - E7 SMOS SNOW DEPTH DATA QUESTIONABLE

Snow depth readings intermittently reported outside the manufacturer's tolerance of +/- 25 
mm.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

• Time of Maximum Snow Depth(time_max_snow)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)

SGP/SMOS/E7 - E7 SMOS SNOW DATA INCORRECT

Due to a programming error all snow depth data were reported as 0.  In effect, no snow 
depth data were collected.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

• Time of Maximum Snow Depth(time_max_snow)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)

SGP/SMOS/E3 - E3 SMOS SNOW DATA INCORRECT

Due to a programming error all snow depth data were reported as 0.  In effect, no snow 
depth data were collected.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Time of Maximum Snow Depth(time_max_snow)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

SGP/SMOS/E3 - E3 SMOS WIND SPEED DATA INCORRECT

Due to an ice storm and subsequent accumulation of ice on the wind speed sensor, the wind 
speed values are artificially low.

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Standard Deviation of Wind Speed(sd_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Standard Deviation of Wind Speed(sd_wspd)

SGP/SMOS/E3 - E3 SMOS 30 MINUTE DATA VALUES SUSPECT

The 30-min data values are suspect due to lowering of tower for routine maintenance.  The 
1-minute data values @ 17:26 were affected.

• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Beam 0 Temperature(temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• barometric pressure(bar_pres)
• Snow Depth(snow)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Hourly precipitation(precip)
• Standard Deviation of wind direction(sd_deg)

• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Relative Humidity(sd_rh)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)
• Hourly precipitation(precip)
• Standard Deviation of Wind Speed(sd_wspd)
• Unit Vector Wind Direction(wdir)
• barometric pressure(bar_pres)
• Standard Deviation of wind direction(sd_deg)
• Snow Depth Sensor(snow_sen)
• Beam 0 Temperature(temp)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Snow Depth(snow)

SGP/SMOS/E7 - E7 SMOS 30-MINUTE DATA VALUES SUSPECT

The 30-min data values are suspect due to tower being lowered for routine maintenance.  
The 1932 GMT 1-minute data values are all off-scale.

• Standard Deviation of Air Temperature(sd_temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• Snow Depth(snow)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)
• Hourly precipitation(precip)
• Beam 0 Temperature(temp)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• barometric pressure(bar_pres)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)

• Hourly precipitation(precip)
• barometric pressure(bar_pres)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Mean Wind Speed(wspd)
• Standard Deviation of Air Temperature(sd_temp)
• Snow Depth Sensor(snow_sen)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)
• Beam 0 Temperature(temp)
• Wind Speed (vector averaged)(wspd_va)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth(snow)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E3 - E3 SMOS DATA VALUES INCORRECT

All data values incorrect due to tower being lowered in order to clean the radiometer 
domes.

• Beam 0 Temperature(temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• barometric pressure(bar_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Snow Depth(snow)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Hourly precipitation(precip)

• Mean Wind Speed(wspd)
• Hourly precipitation(precip)
• barometric pressure(bar_pres)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• Relative humidity inside the instrument enclosure(rh)
• Beam 0 Temperature(temp)

• Hourly precipitation(precip)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)
• barometric pressure(bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)

• Standard Deviation of Relative Humidity(sd_rh)
• Hourly precipitation(precip)
• Standard Deviation of Wind Speed(sd_wspd)
• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• Snow Depth(snow)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Mean Wind Speed(wspd)
• Vapor Pressure (kiloPascals)(vap_pres)
• Unit Vector Wind Direction(wdir)
• barometric pressure(bar_pres)
• Snow Depth Sensor(snow_sen)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)

SGP/SMOS/E7 - SNOW DEPTH DATA QUESTIONABLE

Snow depth readings were intermittently reported as -9999, outside of manufacturer's 
tolerance, and good values.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

• Time of Maximum Snow Depth(time_max_snow)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)

SGP/SMOS/E7 - SNOW DEPTH DATA INCORRECT

Snow depth sensor was removed for the season.  Temperatures fell below 10 deg C causing 
program to collect erroneous data.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

• Time of Maximum Snow Depth(time_max_snow)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)

SGP/SMOS/E3 - SNOW DEPTH SENSOR DATA QUESTIONABLE

Snow depth data was reported intermittently as -9999, outside of manufacturer's tolerance, 
and good.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Time of Maximum Snow Depth(time_max_snow)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

SGP/SMOS/E3 - SNOW DEPTH DATA INCORRECT

The snow depth sensor has been removed for the season.  The temperature dropped below 10 
deg C causing the program to read erroneous data.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Time of Maximum Snow Depth(time_max_snow)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

SGP/SMOS/E7 - Snow depth sensor removed; data reported as missing

The snow depth sensor was removed from service.  The program was changed so that -9999 is 
entered into the datastream.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

• Time of Maximum Snow Depth(time_max_snow)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)

SGP/SMOS/E3 - Snow depth sensor removed; data reported as missing

The snow depth sensor was removed from service.  The program was changed so that -9999 is 
entered into the datastream.

• Snow Depth(snow)
• Snow Depth Sensor(snow_sen)

• Time of Maximum Snow Depth(time_max_snow)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)

• Snow Depth Sensor(snow_sen)
• Snow Depth(snow)

SGP/SMOS/E7 - 30 minute Data Values Suspect

30 minute data values suspect due to tower being lowered from 14:22 - 14:38 GMT for T/RH 
probe replacement.

• Standard Deviation of Air Temperature(sd_temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• Snow Depth(snow)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)
• Hourly precipitation(precip)
• Beam 0 Temperature(temp)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• barometric pressure(bar_pres)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)

• Hourly precipitation(precip)
• barometric pressure(bar_pres)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Mean Wind Speed(wspd)
• Standard Deviation of Air Temperature(sd_temp)
• Snow Depth Sensor(snow_sen)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)
• Beam 0 Temperature(temp)
• Wind Speed (vector averaged)(wspd_va)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth(snow)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E7 - Barometric Pressure Incorrect

The 30 minute barometric pressure reading is artificially low due to two 0.00 values being 
used (20:02 & 20:03 GMT) in the averaging period.

• Standard Deviation of Barometric Pressure(sd_bar_pres)
• barometric pressure(bar_pres)

• barometric pressure(bar_pres)
• Standard Deviation of Barometric Pressure(sd_bar_pres)

SGP/SMOS/E3 - E3 SMOS 30 MINUTE T/RH DATA SUSPECT

30 minute T/RH values suspect due to all T/RH measurements being incorrect from 16:41 - 
17:09 GMT during a maintenance check of the probe.

• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Beam 0 Temperature(temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)

• Standard Deviation of wind direction(sd_deg)
• Beam 0 Temperature(temp)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Relative Humidity(sd_rh)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)

SGP/SMOS/E7 - Barometric Pressure Data Incorrect

Barometric pressure values were reported as 0.00 or -9999.  Barometer was replaced.

• barometric pressure(bar_pres)

• barometric pressure(bar_pres)

• barometric pressure(bar_pres)

• barometric pressure(bar_pres)

• Minimum Barometric Pressure(min_bar_pres)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Maximum Barometric Pressure(max_bar_pres)

SGP/SMOS/E3 - Precip data incorrect

The precipitation that was reported on this date was caused by technicians tip testing the 
gage.  Disregard any precipitation data that was generated.

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

SGP/SMOS/E7 - Precip data not reported

No Precip data collected during this time period.  The CR-10 wiring panel failed and was 
replaced.

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

SGP/SMOS/E3 - E3 SMOS WIND DATA INCORRECT

Wind speed data began to be reported as 0 m/s on 05/01/2003 @ 04:59 GMT.  The wind 
direction data became incorrect soon after the wind speed data.  It was found that the wiring 
had been broken.  The data wires were re-routed and repaired.

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)

• Time of Minimum Wind Speed(time_min_wspd)
• Minimum of Wind speed(min_wspd)
• maximum wind speed (gusts)(max_wspd)
• Time of Maximum Wind Speed(time_max_wspd)

• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)

• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Standard Deviation of Wind Speed(sd_wspd)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E3 - E3 SMOS 30-MINUTE WIND DATA SUSPECT

The 30-minute wind data is suspect due to broken wires.  The wiring was repaired @ 19:09 
GMT.

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)
• Unit Vector Wind Direction(wdir)

SGP/ECOR/E10 - Timestamp problems and intermittent data gaps

The raw files produced by the instrument contained bad (uncorrectable) data.  Specifically 
the date of the data in the file is given a time that is ahead of the actual time the 
data was genertaed.  This was caught because the date in the file was ahead of the system 
time of the server processing the raw file.  The mentor indicated all such files were 
compeltely bad and unrecoverable so all files that failed to be ingested were not shipped to 
the archive, thus producing holes in the raw and processed datastreams.  Because the 
problem was discovered by comparing to system time at time of processing all files between 
these dates should be consider suspect.  Therefore the files that are on the system over 
these three days should be used cautiously

• Raw data stream - documentation not supported(raw)

• covariance wc(cvar_wc)
• skewness of variable c(skew_c)
• rotated covariance wq(cvar_rot_wq)
• rotated covariance wt(cvar_rot_wt)
• vw covariance(cvar_vw)
• covariance vt(cvar_vt)
• covariance vq(cvar_vq)
• number of samples with IRGA optical path blocked flag(n_bad_irga_light)
• rotated covariance wc(cvar_rot_wc)
• h(h)
• average temperature (IGRA internal sensor)(temp_irga)
• number of bad or out of range c samples(n_bad_c)
• Dummy altitude for Zeb(alt)
• covariance wq(cvar_wq)
• wT covariance(cvar_wt)
• number of bad or out of range q samples(n_bad_q)
• CO2 flux(fc)
• variance of u(var_rot_u)
• variance of v(var_rot_v)
• lon(lon)
• variance of w(var_rot_w)
• kurtosis of variable q(kurt_q)
• Retrieved water vapor density profile(rho)
• kurtosis of variable u(kurt_u)
• number of samples with bad sonic status flag(n_bad_son_ic)
• kurtosis of variable t(kurt_t)
• covariance of qc(cvar_qc)
• number of bad or out of range t samples(n_bad_t)
• number of bad or out of range u samples(n_bad_u)
• kurtosis of variable w(kurt_w)
• number of bad or out of range v samples(n_bad_v)
• kurtosis of variable v(kurt_v)
• number of bad or out of range w samples(n_bad_w)
• Vertical angle of wind(phi)
• rotated mean v(mean_rot_v)
• mean horizontal wind speed(mean_rot_u)
• rotated mean w(mean_rot_w)
• latent heat of vaporization(lv)
• mixing ratio(mr)
• momentum flux (dynamic)(k)
• 0=real or 1=dummy value of rho(real_rho)
• base time(base_time)
• average voltage of IRGA cooler(mean_cooler)
• mean co2 concentration (c)(mean_c)
• kurtosis of variable c(kurt_c)
• Cross-boom wind velocity (v)(mean_v)
• variance of variable u(var_u)
• Down-boom wind velocity (u)(mean_u)
• variance of variable v(var_v)
• variance of variable w(var_w)
• Vertical wind velocity (w)(mean_w)
• variance of q(var_q)
• Water vapor density (q)(mean_q)
• Virtual temperature (T)(mean_t)
• variance of t(var_t)
• lat(lat)
• vertical (elevation) wind angle(elev)
• condensation pressure(cp)
• number of c samples removed due to spikes(n_spk_c)
• variance of c(var_c)
• number of w samples removed due to spikes(n_spk_w)
• number of t samples removed due to spikes(n_spk_t)
• number of v samples removed due to spikes(n_spk_v)
• number of u samples removed due to spikes(n_spk_u)
• standard deviation of wind elevation angle(std_elev)
• number of q samples removed due to spikes(n_spk_q)
• Friction velocity(ustar)
• vector averaged wind speed(wind_spd)
• rotated covariance uw(cvar_rot_uw)
• 0=real or 1=dummy value of cp(real_cp)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• number of valid c samples(n_good_c)
• mean value of \spike\ v samples(mean_spk_v)
• number of samples with \IRGA hardware problem\ flag(n_bad_irga)
• mean value of \spike\ w samples(mean_spk_w)
• rotated covariance ut(cvar_rot_ut)
• mean value of out of range values and spikes of t -9999 if no spikes(mean_spk_t)
• mean value of \spike\ u samples(mean_spk_u)
• rotated covariance uv(cvar_rot_uv)
• covariance uc(cvar_uc)
• vector averaged wind direction(wind_dir)
• covariance uq(cvar_uq)
• rotated covariance uq(cvar_rot_uq)
• uw covariance(cvar_uw)
• covariance uv(cvar_uv)
• rotated covariance uc(cvar_rot_uc)
• time(time)
• covariance ut(cvar_ut)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• covariance vc(cvar_vc)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• Time offset of tweaks from base_time(time_offset)
• latent heat flux(lv_e)
• rotated covariance vw(cvar_rot_vw)
• covariance of tc(cvar_tc)
• rotated covariance vt(cvar_rot_vt)
• rotated covariance vq(cvar_rot_vq)
• covariance of tq(cvar_tq)
• 0=real or 1=dummy value of lv(real_lv)
• skewness of variable v(skew_v)
• number of valid q samples(n_good_q)
• skewness of variable w(skew_w)
• skewness of variable t(skew_t)
• skewness of variable u(skew_u)
• 0=real or 1=dummy value of mr(real_mr)
• number of valid u samples(n_good_u)
• number of valid t samples(n_good_t)
• standard deviation of wind direction(std_wind_dir)
• number of valid w samples(n_good_w)
• number of valid v samples(n_good_v)
• rotated covariance vc(cvar_rot_vc)
• skewness of variable q(skew_q)

SGP/SMOS/E3 - 6-month Calibration Checks

During the time periods specified, the SMOS.E3 tower was
lowered for 6-month Calibration Checks.   During these times 
wind data are incorrect and temperature and humidity data 
may be incorrect.

Note, exact times when tower was down or maintenance was
being performed is sometimes unknown.  Users should use
the remaining data from these days with caution.

• Beam 0 Temperature(temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• barometric pressure(bar_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Relative humidity inside the instrument enclosure(rh)

• Mean Wind Speed(wspd)
• barometric pressure(bar_pres)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• Relative humidity inside the instrument enclosure(rh)
• Beam 0 Temperature(temp)

• Maximum Vapor Pressure(max_vap_pres)
• Maximum Barometric Pressure(max_bar_pres)
• maximum wind speed (gusts)(max_wspd)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Barometric Pressure(min_bar_pres)
• Minimum Relative Humidity(min_rh)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Temperature(time_max_temp)
• Maximum Relative Humidity(max_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Temperature(max_temp)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Time of Minimum Temperature(time_min_temp)
• Minimum Vapor Pressure(min_vap_pres)
• Minimum Temperature(min_temp)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Maximum Wind Speed(time_max_wspd)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Wind Speed(time_min_wspd)

• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)
• barometric pressure(bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)

• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Wind Speed(sd_wspd)
• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Mean Wind Speed(wspd)
• Vapor Pressure (kiloPascals)(vap_pres)
• Unit Vector Wind Direction(wdir)
• barometric pressure(bar_pres)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)

SGP/SMOS/E3 - 6-month Calibration Checks

During the time periods specified, the SMOS.E3 tower was lowered for 6-month Calibration 
Checks.   During these times wind data are incorrect and temperature and humidity data may 
be incorrect.

Note, exact times when tower was down or maintenance was being performed is sometimes 
unknown.  Users should use the remaining data from these days with caution.

• Minimum Temperature(min_temp)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Maximum Wind Speed(time_max_wspd)
• Minimum Vapor Pressure(min_vap_pres)
• Time of Maximum Temperature(time_max_temp)
• Minimum Relative Humidity(min_rh)
• maximum wind speed (gusts)(max_wspd)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Minimum Temperature(time_min_temp)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Maximum Temperature(max_temp)
• Minimum Barometric Pressure(min_bar_pres)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Minimum Wind Speed(time_min_wspd)
• Maximum Relative Humidity(max_rh)
• Minimum of Wind speed(min_wspd)

• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Beam 0 Temperature(temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• barometric pressure(bar_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of wind direction(sd_deg)

• Mean Wind Speed(wspd)
• barometric pressure(bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of wind direction(sd_deg)
• Beam 0 Temperature(temp)

SGP/SMOS/E7 - 6-month Calibration Checks

During the time periods specified, the SMOS.E7 tower was
lowered for 6-month Calibration Checks.   During these times 
wind data are incorrect and temperature and humidity data 
may be incorrect.

Note, exact times when tower was down or maintenance was
being performed is sometimes unknown.  Users should use
the remaining data from these days with caution.

• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)
• barometric pressure(bar_pres)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Wind Speed (vector averaged)(wspd_va)

• barometric pressure(bar_pres)
• Mean Wind Speed(wspd)
• Standard Deviation of Air Temperature(sd_temp)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)
• Beam 0 Temperature(temp)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Unit Vector Wind Direction(wdir)
• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)
• barometric pressure(bar_pres)

• Unit Vector Wind Direction(wdir)
• barometric pressure(bar_pres)
• Wind Speed (vector averaged)(wspd_va)
• Relative humidity inside the instrument enclosure(rh)
• Mean Wind Speed(wspd)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

• Time of Maximum Temperature(time_max_temp)
• Maximum Vapor Pressure(max_vap_pres)
• maximum wind speed (gusts)(max_wspd)
• Time of Minimum Temperature(time_min_temp)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Minimum Temperature(min_temp)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Maximum Temperature(max_temp)
• Minimum Barometric Pressure(min_bar_pres)
• Minimum Vapor Pressure(min_vap_pres)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Relative Humidity(max_rh)

SGP/SMOS/E7 - 6-month Calibration Checks

During the time periods specified, the SMOS.E7 tower was lowered for 6-month Calibration 
Checks.   During these times wind data are incorrect and temperature and humidity data may 
be incorrect.

Note, exact times when tower was down or maintenance was being performed is sometimes 
unknown.  Users should use the remaining data from these days with caution.

• Standard Deviation of Air Temperature(sd_temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)
• Beam 0 Temperature(temp)
• barometric pressure(bar_pres)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Relative humidity inside the instrument enclosure(rh)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)

• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• barometric pressure(bar_pres)
• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

• maximum wind speed (gusts)(max_wspd)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Maximum Wind Speed(time_max_wspd)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Maximum Vapor Pressure(max_vap_pres)
• Maximum Temperature(max_temp)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Maximum Temperature(time_max_temp)
• Time of Minimum Temperature(time_min_temp)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Minimum Wind Speed(time_min_wspd)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Minimum Barometric Pressure(min_bar_pres)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Minimum Temperature(min_temp)
• Maximum Relative Humidity(max_rh)

SGP/ECOR/E3 - Missing data

Data are missing and unrecoverable.

• Water vapor density (q)(mean_q)
• latent heat of vaporization(lv)
• mean co2 concentration (c)(mean_c)
• rotated covariance wc(cvar_rot_wc)
• rotated covariance wq(cvar_rot_wq)
• covariance of qc(cvar_qc)
• vertical (elevation) wind angle(elev)
• Dummy altitude for Zeb(alt)
• lat(lat)
• average voltage of IRGA cooler(mean_cooler)
• number of c samples removed due to spikes(n_spk_c)
• number of samples with \IRGA hardware problem\ flag(n_bad_irga)
• rotated covariance wt(cvar_rot_wt)
• standard deviation of wind direction(std_wind_dir)
• standard deviation of wind elevation angle(std_elev)
• variance of w(var_rot_w)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• vector averaged wind speed(wind_spd)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• rotated covariance vc(cvar_rot_vc)
• kurtosis of variable c(kurt_c)
• condensation pressure(cp)
• rotated covariance vq(cvar_rot_vq)
• Retrieved water vapor density profile(rho)
• number of valid q samples(n_good_q)
• rotated covariance vw(cvar_rot_vw)
• Vertical wind velocity (w)(mean_w)
• number of valid t samples(n_good_t)
• variance of v(var_rot_v)
• number of valid u samples(n_good_u)
• variance of u(var_rot_u)
• Virtual temperature (T)(mean_t)
• number of valid v samples(n_good_v)
• number of valid w samples(n_good_w)
• rotated covariance vt(cvar_rot_vt)
• Cross-boom wind velocity (v)(mean_v)
• Down-boom wind velocity (u)(mean_u)
• mean value of out of range values and spikes of t -9999 if no spikes(mean_spk_t)
• mean value of \spike\ u samples(mean_spk_u)
• mean value of \spike\ v samples(mean_spk_v)
• mean value of \spike\ w samples(mean_spk_w)
• vector averaged wind direction(wind_dir)
• CO2 flux(fc)
• 0=real or 1=dummy value of lv(real_lv)
• Vertical angle of wind(phi)
• number of valid c samples(n_good_c)
• 0=real or 1=dummy value of mr(real_mr)
• kurtosis of variable u(kurt_u)
• kurtosis of variable t(kurt_t)
• kurtosis of variable w(kurt_w)
• kurtosis of variable v(kurt_v)
• kurtosis of variable q(kurt_q)
• rotated mean v(mean_rot_v)
• mean horizontal wind speed(mean_rot_u)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• rotated mean w(mean_rot_w)
• covariance of tq(cvar_tq)
• lon(lon)
• number of w samples removed due to spikes(n_spk_w)
• number of u samples removed due to spikes(n_spk_u)
• number of v samples removed due to spikes(n_spk_v)
• number of t samples removed due to spikes(n_spk_t)
• number of q samples removed due to spikes(n_spk_q)
• covariance of tc(cvar_tc)
• 0=real or 1=dummy value of rho(real_rho)
• latent heat flux(lv_e)
• number of samples with IRGA optical path blocked flag(n_bad_irga_light)
• mixing ratio(mr)
• 0=real or 1=dummy value of cp(real_cp)
• base time(base_time)
• covariance uc(cvar_uc)
• Time offset of tweaks from base_time(time_offset)
• uw covariance(cvar_uw)
• covariance uv(cvar_uv)
• covariance ut(cvar_ut)
• covariance uq(cvar_uq)
• Friction velocity(ustar)
• h(h)
• covariance vq(cvar_vq)
• momentum flux (dynamic)(k)
• covariance vc(cvar_vc)
• vw covariance(cvar_vw)
• time(time)
• covariance vt(cvar_vt)
• rotated covariance uc(cvar_rot_uc)
• variance of variable w(var_w)
• covariance wq(cvar_wq)
• variance of t(var_t)
• variance of variable u(var_u)
• variance of variable v(var_v)
• covariance wc(cvar_wc)
• variance of q(var_q)
• rotated covariance ut(cvar_rot_ut)
• rotated covariance uq(cvar_rot_uq)
• rotated covariance uw(cvar_rot_uw)
• rotated covariance uv(cvar_rot_uv)
• variance of c(var_c)
• number of bad or out of range w samples(n_bad_w)
• wT covariance(cvar_wt)
• number of bad or out of range v samples(n_bad_v)
• number of bad or out of range u samples(n_bad_u)
• number of bad or out of range t samples(n_bad_t)
• skewness of variable c(skew_c)
• skewness of variable w(skew_w)
• skewness of variable v(skew_v)
• number of bad or out of range q samples(n_bad_q)
• average temperature (IGRA internal sensor)(temp_irga)
• skewness of variable q(skew_q)
• number of bad or out of range c samples(n_bad_c)
• skewness of variable u(skew_u)
• skewness of variable t(skew_t)
• number of samples with bad sonic status flag(n_bad_son_ic)

SGP/ECOR/E10 - Sensor failure

Due to LI-7500 (H2O/CO2 infrared gas analyzer) sensor failure all humidity and CO2 data 
are incorrect for the period of Jul. 14, 2004 01:00 to Aug. 13, 2004 18:00.

• Raw data stream - documentation not supported(raw)

• covariance wc(cvar_wc)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• mean value of \spike\ v samples(mean_spk_v)
• mean value of \spike\ w samples(mean_spk_w)
• skewness of variable c(skew_c)
• rotated covariance wq(cvar_rot_wq)
• mean value of out of range values and spikes of t -9999 if no spikes(mean_spk_t)
• kurtosis of variable q(kurt_q)
• variance of q(var_q)
• mean value of \spike\ u samples(mean_spk_u)
• Water vapor density (q)(mean_q)
• Retrieved water vapor density profile(rho)
• covariance uc(cvar_uc)
• covariance uq(cvar_uq)
• rotated covariance uq(cvar_rot_uq)
• covariance of qc(cvar_qc)
• condensation pressure(cp)
• covariance vq(cvar_vq)
• rotated covariance uc(cvar_rot_uc)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• rotated covariance wc(cvar_rot_wc)
• variance of c(var_c)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• covariance vc(cvar_vc)
• latent heat flux(lv_e)
• latent heat of vaporization(lv)
• mixing ratio(mr)
• average temperature (IGRA internal sensor)(temp_irga)
• covariance of tc(cvar_tc)
• rotated covariance vq(cvar_rot_vq)
• covariance of tq(cvar_tq)
• covariance wq(cvar_wq)
• average voltage of IRGA cooler(mean_cooler)
• rotated covariance vc(cvar_rot_vc)
• mean co2 concentration (c)(mean_c)
• kurtosis of variable c(kurt_c)
• skewness of variable q(skew_q)

SGP/ECOR/E3 - Failed IRGA

Infrared gas analyzer (IRGA) failed 6/16; a new IRGA was installed on
6/30.  All data related to CO2 and water vapor concentration measurements
(including CO2 flux and latent heat flux) are incorrect for the period of
June 16, 2004, 17:30 to June 30, 2004, 17:30.  Wind and sensible heat flux data are OK.

• rotated covariance uc(cvar_rot_uc)
• Water vapor density (q)(mean_q)
• latent heat of vaporization(lv)
• covariance wq(cvar_wq)
• CO2 flux(fc)
• covariance wc(cvar_wc)
• covariance uc(cvar_uc)
• number of valid c samples(n_good_c)
• mean co2 concentration (c)(mean_c)
• variance of q(var_q)
• rotated covariance wc(cvar_rot_wc)
• rotated covariance wq(cvar_rot_wq)
• covariance of qc(cvar_qc)
• rotated covariance uq(cvar_rot_uq)
• kurtosis of variable q(kurt_q)
• variance of c(var_c)
• number of c samples removed due to spikes(n_spk_c)
• number of samples with \IRGA hardware problem\ flag(n_bad_irga)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• covariance uq(cvar_uq)
• skewness of variable c(skew_c)
• covariance of tq(cvar_tq)
• covariance vq(cvar_vq)
• average temperature (IGRA internal sensor)(temp_irga)
• number of bad or out of range q samples(n_bad_q)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• skewness of variable q(skew_q)
• rotated covariance vc(cvar_rot_vc)
• covariance vc(cvar_vc)
• kurtosis of variable c(kurt_c)
• number of bad or out of range c samples(n_bad_c)
• number of q samples removed due to spikes(n_spk_q)
• condensation pressure(cp)
• covariance of tc(cvar_tc)
• rotated covariance vq(cvar_rot_vq)
• Retrieved water vapor density profile(rho)
• number of valid q samples(n_good_q)
• latent heat flux(lv_e)
• number of samples with IRGA optical path blocked flag(n_bad_irga_light)
• mixing ratio(mr)

SGP/ECOR/E10 - Sensor failure

Due to sensor failure all the parameters measured by the Infrared Gas Analyzer (water 
vapor density, CO2 concentration, fluxes of latent heat and CO2, etc.) are incorrect for the 
period of 18:30 Oct. 22, 2004 to 22:00 Dec. 14, 2004. The data is irrevocably lost.

• Raw data stream - documentation not supported(raw)

• covariance wc(cvar_wc)
• number of valid c samples(n_good_c)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• 0=real or 1=dummy value of cp(real_cp)
• number of samples with \IRGA hardware problem\ flag(n_bad_irga)
• skewness of variable c(skew_c)
• rotated covariance wq(cvar_rot_wq)
• kurtosis of variable q(kurt_q)
• variance of q(var_q)
• Water vapor density (q)(mean_q)
• Retrieved water vapor density profile(rho)
• covariance uc(cvar_uc)
• covariance uq(cvar_uq)
• number of samples with bad sonic status flag(n_bad_son_ic)
• rotated covariance uq(cvar_rot_uq)
• covariance of qc(cvar_qc)
• condensation pressure(cp)
• covariance vq(cvar_vq)
• number of samples with IRGA optical path blocked flag(n_bad_irga_light)
• rotated covariance uc(cvar_rot_uc)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• number of c samples removed due to spikes(n_spk_c)
• rotated covariance wc(cvar_rot_wc)
• variance of c(var_c)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• covariance vc(cvar_vc)
• latent heat flux(lv_e)
• mixing ratio(mr)
• average temperature (IGRA internal sensor)(temp_irga)
• covariance of tc(cvar_tc)
• number of bad or out of range c samples(n_bad_c)
• 0=real or 1=dummy value of rho(real_rho)
• rotated covariance vq(cvar_rot_vq)
• number of q samples removed due to spikes(n_spk_q)
• covariance of tq(cvar_tq)
• 0=real or 1=dummy value of lv(real_lv)
• number of valid q samples(n_good_q)
• covariance wq(cvar_wq)
• 0=real or 1=dummy value of mr(real_mr)
• average voltage of IRGA cooler(mean_cooler)
• number of bad or out of range q samples(n_bad_q)
• CO2 flux(fc)
• rotated covariance vc(cvar_rot_vc)
• mean co2 concentration (c)(mean_c)
• kurtosis of variable c(kurt_c)
• skewness of variable q(skew_q)

SGP/ECOR/E3 - Data transfer problem

Serial communication with one sensor (the IRGA) were partially disrupted due to 
deteriorating hardware from 13:53, Dec. 19, 2004 to 09:31 Dec. 20, 2004.  Serial data from the IRGA 
is mainly used to get sensor status codes, so this might lead to false increase of "bad" 
point count.  It seems that IRGA analog outputs (stored in raw sonic data file,  primary 
source of data) were not affected, so the flux data may be reprocessed or verified using 
raw sonic data files and ignoring IRGA sensor status.

• Raw data stream - documentation not supported(raw)

• rotated covariance uc(cvar_rot_uc)
• Water vapor density (q)(mean_q)
• latent heat of vaporization(lv)
• covariance wq(cvar_wq)
• CO2 flux(fc)
• covariance wc(cvar_wc)
• covariance uc(cvar_uc)
• number of valid c samples(n_good_c)
• mean co2 concentration (c)(mean_c)
• variance of q(var_q)
• rotated covariance wc(cvar_rot_wc)
• rotated covariance wq(cvar_rot_wq)
• covariance of qc(cvar_qc)
• rotated covariance uq(cvar_rot_uq)
• kurtosis of variable q(kurt_q)
• variance of c(var_c)
• average voltage of IRGA cooler(mean_cooler)
• number of c samples removed due to spikes(n_spk_c)
• number of samples with \IRGA hardware problem\ flag(n_bad_irga)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• covariance uq(cvar_uq)
• rotated covariance wt(cvar_rot_wt)
• skewness of variable c(skew_c)
• covariance of tq(cvar_tq)
• covariance vq(cvar_vq)
• average temperature (IGRA internal sensor)(temp_irga)
• number of bad or out of range q samples(n_bad_q)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• skewness of variable q(skew_q)
• rotated covariance vc(cvar_rot_vc)
• covariance vc(cvar_vc)
• kurtosis of variable c(kurt_c)
• number of bad or out of range c samples(n_bad_c)
• number of q samples removed due to spikes(n_spk_q)
• condensation pressure(cp)
• covariance of tc(cvar_tc)
• rotated covariance vq(cvar_rot_vq)
• Retrieved water vapor density profile(rho)
• number of valid q samples(n_good_q)
• latent heat flux(lv_e)
• number of samples with IRGA optical path blocked flag(n_bad_irga_light)
• mixing ratio(mr)

SGP/SMOS/E3 - Intermittent Instrument problem

RH values drop erroneously low intermittently during time period.  Subsequent maintenance 
could find no problem and problem disappeared on its own.

• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Relative Humidity(sd_rh)

• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)
• Minimum Relative Humidity(min_rh)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/SMOS/E3 - Ice Storm froze wind speed sensor

Wind speed sensor frozen or affected by ice storm during the periods
specified.

• Time of Minimum Wind Speed(time_min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• maximum wind speed (gusts)(max_wspd)
• Minimum of Wind speed(min_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)

SGP/SMOS/E3 - Wind Data Suspect

Wind speed and direction data are suspect during time period due to icing.

• Time of Minimum Wind Speed(time_min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• maximum wind speed (gusts)(max_wspd)
• Minimum of Wind speed(min_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)

SGP/SMOS/E7 - Wind Data Suspect

Wind speed and direction data suspect during time period due to icing.

• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)

• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)

• maximum wind speed (gusts)(max_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum of Wind speed(min_wspd)

SGP/ECOR/E10 - Reprocess: Incorrect H2O, CO2

Due to failure of analog output circuitry in the Infrared Gas Analyzer (IRGA), CO2 and 
water vapor parameters measured by the IRGA (water vapor density, CO2 concentration, fluxes 
of latent heat and CO2) were incorrectly recorded in sonic raw data files for the period 
of 22:30 Dec. 14, 2004 to 22:00 Jan. 11, 2005. The data could be recovered from IRGA raw 
serial files (00 level).

• Raw data stream - documentation not supported(raw)

• covariance wc(cvar_wc)
• number of valid c samples(n_good_c)
• 0=real or 1=dummy value of cp(real_cp)
• number of samples with \IRGA hardware problem\ flag(n_bad_irga)
• skewness of variable c(skew_c)
• rotated covariance wq(cvar_rot_wq)
• kurtosis of variable q(kurt_q)
• variance of q(var_q)
• Water vapor density (q)(mean_q)
• Retrieved water vapor density profile(rho)
• covariance uc(cvar_uc)
• covariance uq(cvar_uq)
• rotated covariance uq(cvar_rot_uq)
• covariance of qc(cvar_qc)
• condensation pressure(cp)
• covariance vq(cvar_vq)
• rotated covariance uc(cvar_rot_uc)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• number of c samples removed due to spikes(n_spk_c)
• rotated covariance wc(cvar_rot_wc)
• variance of c(var_c)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• covariance vc(cvar_vc)
• latent heat flux(lv_e)
• latent heat of vaporization(lv)
• mixing ratio(mr)
• covariance of tc(cvar_tc)
• number of bad or out of range c samples(n_bad_c)
• 0=real or 1=dummy value of rho(real_rho)
• rotated covariance vq(cvar_rot_vq)
• number of q samples removed due to spikes(n_spk_q)
• covariance of tq(cvar_tq)
• 0=real or 1=dummy value of lv(real_lv)
• number of valid q samples(n_good_q)
• covariance wq(cvar_wq)
• 0=real or 1=dummy value of mr(real_mr)
• number of bad or out of range q samples(n_bad_q)
• CO2 flux(fc)
• rotated covariance vc(cvar_rot_vc)
• mean co2 concentration (c)(mean_c)
• kurtosis of variable c(kurt_c)
• skewness of variable q(skew_q)

SGP/ECOR/E10 - Reprocess: Incorrectly flagged (marked as "bad") H2O/CO2 data

Due to system clock instability on ECOR computers their system time is adjusted 
approximately once per hour; sometimes this adjustment leads to backward time jumps over midnight, 
into the previous day. In this case all the data based on CO2/H2O measurements might be 
erroneously marked as bad.

• covariance wc(cvar_wc)
• number of valid c samples(n_good_c)
• 0=real or 1=dummy value of cp(real_cp)
• skewness of variable c(skew_c)
• rotated covariance wq(cvar_rot_wq)
• variance of q(var_q)
• Water vapor density (q)(mean_q)
• covariance uc(cvar_uc)
• covariance uq(cvar_uq)
• rotated covariance uq(cvar_rot_uq)
• covariance of qc(cvar_qc)
• condensation pressure(cp)
• covariance vq(cvar_vq)
• rotated covariance uc(cvar_rot_uc)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• number of c samples removed due to spikes(n_spk_c)
• rotated covariance wc(cvar_rot_wc)
• variance of c(var_c)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• covariance vc(cvar_vc)
• latent heat flux(lv_e)
• latent heat of vaporization(lv)
• mixing ratio(mr)
• covariance of tc(cvar_tc)
• number of bad or out of range c samples(n_bad_c)
• 0=real or 1=dummy value of rho(real_rho)
• rotated covariance vq(cvar_rot_vq)
• covariance of tq(cvar_tq)
• number of q samples removed due to spikes(n_spk_q)
• 0=real or 1=dummy value of lv(real_lv)
• number of valid q samples(n_good_q)
• covariance wq(cvar_wq)
• 0=real or 1=dummy value of mr(real_mr)
• number of bad or out of range q samples(n_bad_q)
• CO2 flux(fc)
• rotated covariance vc(cvar_rot_vc)
• mean co2 concentration (c)(mean_c)
• skewness of variable q(skew_q)

SGP/SMOS/E3 - Reprocess: Wind direction offset

When the SGP.E3 SMOS tower was installed it was not aligned
properly resulting in a 7 degree offset.  On 3/9/05, the 
datalogger program was modified to correct for this offset.

• Unit Vector Wind Direction(wdir)

• Unit Vector Wind Direction(wdir)

SGP/SMOS/E7 - Reprocess: Wind direction offset

When the SGP.E7 SMOS tower was installed it was not aligned
properly resulting in a 6 degree offset.  On 3/08/05, the
datalogger program was modified to correct for this offset.

• Unit Vector Wind Direction(wdir)

• Unit Vector Wind Direction(wdir)

SGP/ECOR/E10 - Missing data

Data are missing and unrecoverable.

• covariance wc(cvar_wc)
• skewness of variable c(skew_c)
• rotated covariance wq(cvar_rot_wq)
• rotated covariance wt(cvar_rot_wt)
• vw covariance(cvar_vw)
• covariance vt(cvar_vt)
• covariance vq(cvar_vq)
• number of samples with IRGA optical path blocked flag(n_bad_irga_light)
• rotated covariance wc(cvar_rot_wc)
• h(h)
• average temperature (IGRA internal sensor)(temp_irga)
• number of bad or out of range c samples(n_bad_c)
• Dummy altitude for Zeb(alt)
• covariance wq(cvar_wq)
• wT covariance(cvar_wt)
• number of bad or out of range q samples(n_bad_q)
• CO2 flux(fc)
• variance of u(var_rot_u)
• variance of v(var_rot_v)
• lon(lon)
• variance of w(var_rot_w)
• kurtosis of variable q(kurt_q)
• Retrieved water vapor density profile(rho)
• kurtosis of variable u(kurt_u)
• number of samples with bad sonic status flag(n_bad_son_ic)
• kurtosis of variable t(kurt_t)
• covariance of qc(cvar_qc)
• number of bad or out of range t samples(n_bad_t)
• number of bad or out of range u samples(n_bad_u)
• kurtosis of variable w(kurt_w)
• number of bad or out of range v samples(n_bad_v)
• kurtosis of variable v(kurt_v)
• number of bad or out of range w samples(n_bad_w)
• Vertical angle of wind(phi)
• rotated mean v(mean_rot_v)
• mean horizontal wind speed(mean_rot_u)
• rotated mean w(mean_rot_w)
• latent heat of vaporization(lv)
• mixing ratio(mr)
• momentum flux (dynamic)(k)
• 0=real or 1=dummy value of rho(real_rho)
• base time(base_time)
• average voltage of IRGA cooler(mean_cooler)
• mean co2 concentration (c)(mean_c)
• kurtosis of variable c(kurt_c)
• Cross-boom wind velocity (v)(mean_v)
• variance of variable u(var_u)
• Down-boom wind velocity (u)(mean_u)
• variance of variable v(var_v)
• variance of variable w(var_w)
• Vertical wind velocity (w)(mean_w)
• variance of q(var_q)
• Water vapor density (q)(mean_q)
• Virtual temperature (T)(mean_t)
• variance of t(var_t)
• lat(lat)
• vertical (elevation) wind angle(elev)
• condensation pressure(cp)
• number of c samples removed due to spikes(n_spk_c)
• variance of c(var_c)
• number of w samples removed due to spikes(n_spk_w)
• number of t samples removed due to spikes(n_spk_t)
• number of v samples removed due to spikes(n_spk_v)
• number of u samples removed due to spikes(n_spk_u)
• standard deviation of wind elevation angle(std_elev)
• number of q samples removed due to spikes(n_spk_q)
• Friction velocity(ustar)
• vector averaged wind speed(wind_spd)
• rotated covariance uw(cvar_rot_uw)
• 0=real or 1=dummy value of cp(real_cp)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• number of valid c samples(n_good_c)
• mean value of \spike\ v samples(mean_spk_v)
• number of samples with \IRGA hardware problem\ flag(n_bad_irga)
• mean value of \spike\ w samples(mean_spk_w)
• rotated covariance ut(cvar_rot_ut)
• mean value of out of range values and spikes of t -9999 if no spikes(mean_spk_t)
• mean value of \spike\ u samples(mean_spk_u)
• rotated covariance uv(cvar_rot_uv)
• covariance uc(cvar_uc)
• vector averaged wind direction(wind_dir)
• covariance uq(cvar_uq)
• rotated covariance uq(cvar_rot_uq)
• uw covariance(cvar_uw)
• covariance uv(cvar_uv)
• rotated covariance uc(cvar_rot_uc)
• time(time)
• covariance ut(cvar_ut)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)
• covariance vc(cvar_vc)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• Time offset of tweaks from base_time(time_offset)
• latent heat flux(lv_e)
• rotated covariance vw(cvar_rot_vw)
• covariance of tc(cvar_tc)
• rotated covariance vt(cvar_rot_vt)
• rotated covariance vq(cvar_rot_vq)
• covariance of tq(cvar_tq)
• 0=real or 1=dummy value of lv(real_lv)
• skewness of variable v(skew_v)
• number of valid q samples(n_good_q)
• skewness of variable w(skew_w)
• skewness of variable t(skew_t)
• skewness of variable u(skew_u)
• 0=real or 1=dummy value of mr(real_mr)
• number of valid u samples(n_good_u)
• number of valid t samples(n_good_t)
• standard deviation of wind direction(std_wind_dir)
• number of valid w samples(n_good_w)
• number of valid v samples(n_good_v)
• rotated covariance vc(cvar_rot_vc)
• skewness of variable q(skew_q)

SGP/ECOR/E3 - CO2/H2O Sensor Not Working

The CO2/H2O sensor failed.  Means and fluxes of CO2 and H2O (lv_e) are incorrect or 
missing.

• rotated covariance uc(cvar_rot_uc)
• Water vapor density (q)(mean_q)
• covariance of tq(cvar_tq)
• covariance vq(cvar_vq)
• average temperature (IGRA internal sensor)(temp_irga)
• covariance wq(cvar_wq)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• CO2 flux(fc)
• covariance wc(cvar_wc)
• rotated covariance vc(cvar_rot_vc)
• covariance vc(cvar_vc)
• covariance uc(cvar_uc)
• variance of q(var_q)
• mean co2 concentration (c)(mean_c)
• rotated covariance wc(cvar_rot_wc)
• rotated covariance wq(cvar_rot_wq)
• covariance of tc(cvar_tc)
• covariance of qc(cvar_qc)
• rotated covariance vq(cvar_rot_vq)
• rotated covariance uq(cvar_rot_uq)
• latent heat flux(lv_e)
• variance of c(var_c)
• covariance uq(cvar_uq)

SGP/SMOS/E3 - RH values above max limit during high humidity situations

RH% values intremittently exceeded maximum allowed during high humidity situations.  
Sensor was replaced.

• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Relative Humidity(sd_rh)

• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)
• Minimum Relative Humidity(min_rh)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/ECOR/E10 - Reprocess: Wind Direction Incorrect

It was discovered that the E10 ECOR boom is aligned 17 degrees to the west of true north.  
Therefore, all wind direction data for the stated period is 17 degrees too high.  
Subtract 17 degrees from the wind direction to give the correct direction.

The E10 configuration file was modified to correct this problem.

• vector averaged wind direction(wind_dir)

SGP/ECOR/E10 - LI-7500 Pressure and Temperature missing

The LI-7500 pressure and temperature were not recorded;
the serial datastream was not being captured by the ECOR.

• average temperature (IGRA internal sensor)(temp_irga)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)

SGP/SMOS/E3 - Rainfall Data Suspect

Rainfall during this time period was suspect as the gauge was found plugged on 07/12/2006. 
 Last check of site occurred on 06/28/2006.  Any rainfall data collected, whether the 
data is 0 or other than zero is suspect.

• Hourly precipitation(precip)

• Hourly precipitation(precip)

SGP/SMOS/E7 - Rainfall Data Suspect

Rainfall during this time period was suspect as the gauge was found plugged on 11/28/2006. 
 Last check of site occurred on 11/14/2006.  Any rainfall data collected, whether the 
data is 0 or other than zero is suspect.

• Hourly precipitation(precip)

• Hourly precipitation(precip)

SGP/ECOR/E10 - CO2 and Latent Heat Fluxes Incorrect

The CO2 and latent heat fluxes were incorrect because the sonic anemometer was not working 
properly.

• covariance wc(cvar_wc)
• covariance wq(cvar_wq)
• rotated covariance wq(cvar_rot_wq)
• variance of q(var_q)
• Water vapor density (q)(mean_q)
• rotated covariance wc(cvar_rot_wc)
• variance of c(var_c)
• CO2 flux(fc)
• mean co2 concentration (c)(mean_c)
• latent heat flux(lv_e)

SGP/SMOS/E7 - Wind sensor binding at low wind speeds

The wind sensor bearings were failing causing the wind speed sensor to report lower than 
actual wind speeds when the winds were below 2 m/s.  The wind monitor was replaced on 
05/29/2007 but this failed to correct the problem.  Subsequently, the site was flooded and it 
took some time to re-establish normal operations.  The wind sensor was again replaced on 
10/30/2007.  After replacement the wind data from the SMOS compared more favorably to 
the co-located EBBR data.

• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)

• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)

• Time of Minimum Wind Speed(time_min_wspd)
• Minimum of Wind speed(min_wspd)

SGP/SMOS/E3 - Wind Data Incorrect Due to Icing

An ice storm caused the wind data from the RM Young wind sensor to be incorrect.  In many 
instances it was frozen and unmoving, at times it measured values but those are extremely 
suspect.

• Time of Minimum Wind Speed(time_min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• maximum wind speed (gusts)(max_wspd)
• Minimum of Wind speed(min_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)

SGP/SMOS/E7 - Wind Data Suspect Due to Icing

The wind data appear sluggish compared to nearby sites.  Cold temperatures and precip 
suggest mild icing on the sensor.

• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)

• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)

• maximum wind speed (gusts)(max_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum of Wind speed(min_wspd)

SGP/SMOS - Snowfall caused delayed count of precip

A snow/ice storm moved through the SGP region on 01/31/08 bringing below-freezing 
temperatures, affecting the precip field.  Data is suspect during the date/time range specified 
due to melting ice after temperatures warmed above freezing.

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

SGP/SMOS/E3 - Incorrect Offset for Wind Directon

An incorrect offset of 7 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)

• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E7 - Incorrect Offset for Wind Directon

An incorrect offset of 6 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)

• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)

SGP/ECOR/E10 - Incorrect CO2 fluxes

The analog CO2 signal from the LI-7500 to the sonic anemometer became very noisy and 
incorrect CO2 fluxes resulted. Sonic anemometer was replaced.

• CO2 flux(fc)

SGP/SMOS/E3 - Missing data

Data are missing and unrecoverable

• Beam 0 Temperature(temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• barometric pressure(bar_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Dummy altitude for Zeb(alt)
• lon(lon)
• Unit Vector Wind Direction(wdir)
• Time offset of tweaks from base_time(time_offset)
• Batter Voltage(vbat)
• base time(base_time)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Snow Depth(snow)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• lat(lat)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Hourly precipitation(precip)

• Mean Wind Speed(wspd)
• Hourly precipitation(precip)
• barometric pressure(bar_pres)
• base time(base_time)
• lon(lon)
• Dummy altitude for Zeb(alt)
• Standard Deviation of wind direction(sd_deg)
• lat(lat)
• Vapor Pressure (kiloPascals)(vap_pres)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• Relative humidity inside the instrument enclosure(rh)
• Time offset of tweaks from base_time(time_offset)
• Beam 0 Temperature(temp)

• Maximum Vapor Pressure(max_vap_pres)
• Maximum Barometric Pressure(max_bar_pres)
• maximum wind speed (gusts)(max_wspd)
• Time of Minimum Relative Humidity(time_min_rh)
• lon(lon)
• Minimum Barometric Pressure(min_bar_pres)
• Time of Maximum Snow Depth(time_max_snow)
• Minimum Relative Humidity(min_rh)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Temperature(time_max_temp)
• Maximum Relative Humidity(max_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Maximum Snow Depth(max_snow)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Temperature(max_temp)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Time of Minimum Temperature(time_min_temp)
• Dummy altitude for Zeb(alt)
• Minimum Vapor Pressure(min_vap_pres)
• Minimum Temperature(min_temp)
• base time(base_time)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Minimum Snow Depth(time_min_snow)
• Time offset of tweaks from base_time(time_offset)
• Time of Maximum Wind Speed(time_max_wspd)
• lat(lat)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum Snow Depth(min_snow_depth)

SGP/SMOS/E3 - Missing data

Data are missing and unrecoverable

• Beam 0 Temperature(temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• barometric pressure(bar_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Dummy altitude for Zeb(alt)
• lon(lon)
• Unit Vector Wind Direction(wdir)
• Time offset of tweaks from base_time(time_offset)
• Batter Voltage(vbat)
• base time(base_time)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Snow Depth(snow)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• lat(lat)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Hourly precipitation(precip)

• lon(lon)
• base time(base_time)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Dummy altitude for Zeb(alt)
• Time of Maximum Wind Speed(time_max_wspd)
• Minimum Vapor Pressure(min_vap_pres)
• Time of Maximum Temperature(time_max_temp)
• Minimum Relative Humidity(min_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• lat(lat)
• Maximum Temperature(max_temp)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time offset of tweaks from base_time(time_offset)
• Minimum Snow Depth(min_snow_depth)
• Minimum Temperature(min_temp)
• time(time)
• Time of Maximum Snow Depth(time_max_snow)
• maximum wind speed (gusts)(max_wspd)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Minimum Temperature(time_min_temp)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Minimum Barometric Pressure(min_bar_pres)
• Maximum Snow Depth(max_snow)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Minimum Wind Speed(time_min_wspd)
• Maximum Relative Humidity(max_rh)
• Minimum of Wind speed(min_wspd)

• Mean Wind Speed(wspd)
• Hourly precipitation(precip)
• barometric pressure(bar_pres)
• base time(base_time)
• lon(lon)
• Dummy altitude for Zeb(alt)
• Standard Deviation of wind direction(sd_deg)
• lat(lat)
• Vapor Pressure (kiloPascals)(vap_pres)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• Relative humidity inside the instrument enclosure(rh)
• Time offset of tweaks from base_time(time_offset)
• Beam 0 Temperature(temp)

SGP/SMOS/E7 - Missing data

Data are missing and unrecoverable

• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)
• Time offset of tweaks from base_time(time_offset)
• Hourly precipitation(precip)
• lon(lon)
• Batter Voltage(vbat)
• barometric pressure(bar_pres)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)
• Dummy altitude for Zeb(alt)
• Vapor Pressure (kiloPascals)(vap_pres)
• Snow Depth(snow)
• Mean Wind Speed(wspd)
• base time(base_time)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• lat(lat)
• Snow Depth Sensor(snow_sen)
• Wind Speed (vector averaged)(wspd_va)

• Unit Vector Wind Direction(wdir)
• Dummy altitude for Zeb(alt)
• barometric pressure(bar_pres)
• Wind Speed (vector averaged)(wspd_va)
• lon(lon)
• Relative humidity inside the instrument enclosure(rh)
• base time(base_time)
• Mean Wind Speed(wspd)
• Hourly precipitation(precip)
• Standard Deviation of wind direction(sd_deg)
• Time offset of tweaks from base_time(time_offset)
• Vapor Pressure (kiloPascals)(vap_pres)
• lat(lat)
• Beam 0 Temperature(temp)

• Time of Maximum Temperature(time_max_temp)
• Time of Maximum Snow Depth(time_max_snow)
• Maximum Vapor Pressure(max_vap_pres)
• maximum wind speed (gusts)(max_wspd)
• base time(base_time)
• Time of Minimum Temperature(time_min_temp)
• lat(lat)
• Time of Minimum Snow Depth(time_min_snow)
• Time offset of tweaks from base_time(time_offset)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Minimum Temperature(min_temp)
• Minimum Snow Depth(min_snow_depth)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum Relative Humidity(min_rh)
• Maximum Snow Depth(max_snow)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• lon(lon)
• Maximum Temperature(max_temp)
• Minimum Barometric Pressure(min_bar_pres)
• Minimum Vapor Pressure(min_vap_pres)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• Dummy altitude for Zeb(alt)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Relative Humidity(max_rh)

SGP/SMOS/E7 - Missing data

Data are missing and unrecoverable

• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)
• Time offset of tweaks from base_time(time_offset)
• Hourly precipitation(precip)
• lon(lon)
• Batter Voltage(vbat)
• barometric pressure(bar_pres)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)
• Dummy altitude for Zeb(alt)
• Vapor Pressure (kiloPascals)(vap_pres)
• Snow Depth(snow)
• Mean Wind Speed(wspd)
• base time(base_time)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• lat(lat)
• Snow Depth Sensor(snow_sen)
• Wind Speed (vector averaged)(wspd_va)

• Unit Vector Wind Direction(wdir)
• Dummy altitude for Zeb(alt)
• barometric pressure(bar_pres)
• Wind Speed (vector averaged)(wspd_va)
• lon(lon)
• Relative humidity inside the instrument enclosure(rh)
• base time(base_time)
• Mean Wind Speed(wspd)
• Hourly precipitation(precip)
• Standard Deviation of wind direction(sd_deg)
• Time offset of tweaks from base_time(time_offset)
• Vapor Pressure (kiloPascals)(vap_pres)
• lat(lat)
• Beam 0 Temperature(temp)

• base time(base_time)
• Time of Maximum Relative Humidity(time_max_rh)
• Time offset of tweaks from base_time(time_offset)
• Time of Minimum Snow Depth(time_min_snow)
• Maximum Vapor Pressure(max_vap_pres)
• Maximum Temperature(max_temp)
• Maximum Barometric Pressure(max_bar_pres)
• Minimum Relative Humidity(min_rh)
• Dummy altitude for Zeb(alt)
• Time of Maximum Snow Depth(time_max_snow)
• Time of Minimum Wind Speed(time_min_wspd)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Minimum Vapor Pressure(min_vap_pres)
• Minimum Barometric Pressure(min_bar_pres)
• Minimum Temperature(min_temp)
• maximum wind speed (gusts)(max_wspd)
• Minimum Snow Depth(min_snow_depth)
• Time of Maximum Wind Speed(time_max_wspd)
• lon(lon)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• time(time)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Temperature(time_max_temp)
• Time of Minimum Temperature(time_min_temp)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• lat(lat)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Snow Depth(max_snow)
• Maximum Relative Humidity(max_rh)