SGP/ECOR/E14 - CO2/H2O Incorrect

The LI-7500 CO2/H2O sensor stopped working after a rainstorm.  CO2 and H2O data are 
incorrect during the stated period.

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

SGP/ECOR/E14 - Flux Measurements Incorrect

The ECOR datastream was corrupted; this happens when the ECOR program produces a 
datastream of the wrong length (i.e., leaves one or more measurements out).

Fluxes and some other measurements are incorrect.

Reprocessing will not correct this problem; the raw data are corrupted.

• mean co2 concentration (c)(mean_c)
• CO2 flux(fc)
• Water vapor density (q)(mean_q)
• average temperature (IGRA internal sensor)(temp_irga)
• average atmospheric pressure (IGRA internal sensor)(atm_pres)
• h(h)
• latent heat flux(lv_e)

SGP/ECOR/E14 - Fluxes and Most Measurements Incorrect

The ECOR system was having major problems during this period and most measurements were 
incorrect most of the time.

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

SGP/ECOR/E14 - IRGA Temperature Incorrect or Missing

The temp_irga was too large 05/09/07 1300 GMT - 05/10/07 2000 GMT.

The temp_irga was flat lined at 49.96 C 05/10/07 2030 GMT - 05/17/07 2000 GMT.  

The temp_irga was missing 05/17/07 2030 GMT - 05/19/07 1700 GMT.

• average temperature (IGRA internal sensor)(temp_irga)

SGP/ECOR/E14 - Sensor failure

The water vapor output of the LI-7500 was too low, indicating that water vapor leaked into 
the sensor and that the chemicals are spent or there was an electronic failure.

Latent heat flux was not normally affected by this problem.

• Water vapor density (q)(mean_q)