NIM/ECOR/M1 - Missing data

Data are missing and unrecoverable.

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

NIM/SONDE/M1 - RH data incorrect.

RH% values oscillate between ambient values and 0%.  The 0% RH values are incorrect.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)

NIM/MET/M1 - Software problem

Intermittent Failure of Logger to read data from the Barometer.

• Barometric Pressure(atmos_pressure)

NIM/MWR/M1 - Instrument noise problem/RF interference

Data are affected by intermittent spikes that become more frequent starting in March 2006. 
Spikes affect data mostly around 9 AM and 18:00 PM. The origin of the spikes is probably 
RF interference.

• Averaged total liquid water along LOS path(liq)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• MWR column precipitable water vapor(vap)
• 31.4 GHz sky signal(sky31)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• 23.8 GHz sky signal(sky23)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky signal(tipsky23)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

NIM/MET/M1  - Optical Rain Gauge Failure

The optical rain gauge on the met system did not record precipitation during this time 
period.

• Precipitation rate mean(precip_rate_mean)
• Precipitation rate maximum(precip_rate_max)
• Precipitation rate minimum(precip_rate_min)
• Precipitation rate standard deviation(precip_rate_sd)

NIM/ECOR/M1 - Data Suspect for NW and East Wind Directions

Data for these wind directions must be closely evaluated to determine if it is correct or 
incorrect.  Problem will remain for the entire extend of the NIM deployment.

• rotated covariance uw(cvar_rot_uw)
• vw covariance(cvar_vw)
• rotated covariance wc(cvar_rot_wc)
• mean value of out of range values and spikes of t -9999 if no spikes(mean_spk_t)
• CO2 flux(fc)
• Virtual temperature (T)(mean_t)
• h(h)
• latent heat flux(lv_e)
• rotated covariance vw(cvar_rot_vw)
• rotated mean w(mean_rot_w)
• Water vapor density (q)(mean_q)
• covariance wq(cvar_wq)
• rotated covariance wt(cvar_rot_wt)
• rotated covariance wq(cvar_rot_wq)
• mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
• momentum flux (dynamic)(k)
• mean co2 concentration (c)(mean_c)
• uw covariance(cvar_uw)
• covariance wc(cvar_wc)
• mean value of \spike\ w samples(mean_spk_w)
• wT covariance(cvar_wt)
• Vertical wind velocity (w)(mean_w)
• Friction velocity(ustar)
• mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)

NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating.

The radiometer was intermittently thermally unstable resulting in poor calibrations for 
four brief time periods.  These data have been reprocessed to apply corrected calibrations. 
 The affected time periods were:

20060302-20060303
20060423-20060425
20060512-20060515
20060531-20060603

• 23.8 GHz blackbody+noise injection signal(bbn23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Mixer kinetic (physical) temperature(tkxc)
• MWR column precipitable water vapor(vap)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 23.8 GHz Blackbody signal(bb23)
• (tknd)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz sky signal(sky23)
• Averaged total liquid water along LOS path(liq)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• 31.4 GHz sky signal(sky31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz blackbody(bb31)

• 31.4 GHz blac2body+noise injection signal(bbn31)
• Mixer kinetic (physical) temperature(tkxc)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz Blackbody signal(bb23)
• 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
• 23.8 GHz sky signal(tipsky23)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Blackbody kinetic temperature(tkbb)
• (tknd)

NIM/MWR/M1 - Sun in field of view of radiometer

Around 12 pm every day between 8/1 and 8/31 there is an increase in the brightness 
temperature due to the sun being in the field of view of the radiometer.

• Averaged total liquid water along LOS path(liq)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• MWR column precipitable water vapor(vap)
• Sky brightness temperature at 31.4 GHz(tbsky31)

NIM/ECOR/M1 - Effects on ECOR CO2 Flux and Concentration By Aircraft

Aircraft landings, departures, and running aircraft on the airport pad
were found to produce large spikes in the half hourly CO2 flux and small spikes in CO2 
concentration on many days during the entire deployment of the AMF at NIM.  This influence 
was found on 40% of the days in March and April 2006 and sometimes for multiple periods in 
a day; this was typical of  the year of data.  The spikes range from only several 
micromoles s-1 m-2 to one hundred or more for flux (a typical spike was in the twenties) and 
near zero to 1.0 mmoles m-3 for CO2 concentration (typically around 0.15).

The aircraft influence was caused by persistent easterly winds; the airport
terminal pad and the nearest part of the runway were almost directly to the
east of the ECOR location.

Occasionally an influence on water vapor density was detected, but this was fairly rare 
and usually of very small magnitude.

• rotated covariance vc(cvar_rot_vc)
• covariance wc(cvar_wc)
• rotated covariance wc(cvar_rot_wc)
• covariance of tc(cvar_tc)
• CO2 flux(fc)
• rotated covariance uc(cvar_rot_uc)
• variance of c(var_c)
• covariance vc(cvar_vc)
• covariance uc(cvar_uc)
• mean co2 concentration (c)(mean_c)

NIM/RWP/M1 - Reprocess: Wind direction offset

A strong wind storm on June 17, 2006 toppled the RWP antenna.  After repair and 
reinstallation, the wind direction reported by the instrument was rotated counterclockwise 90 
degrees, possibly because the antenna was installed rotated by 90 deg.  This condition 
continued through the remainder of deployment.

All wind direction values need to be increased by 90 degrees.

• V-component(v_wind)
• U-component(u_wind)