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.

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

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.

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

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

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)