Annual calibration changeout

DQR No:                               Platform: EBBR

Subject:  Annual Calibration Changeout - E7, Elk Falls, KS

Date Submitted:  December 21, 1995
Submitted By:                         _x_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other _____________________________

For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: EBBR/Changeout
        What level data: (raw,a0,a1,b1,c1 etc): a1 (5 and 30 minute)
                                                a0 (15 minute)

    What location was the data collected at: E7, Elk Falls, KS

    Period of time in question
        Begin Date 11/02/95   Time 1530 GMT
        End Date   11/28/95   Time 2200 GMT

 Data should be labeled:
 ___  questionable                      ___  All data fields affected
                                             part of the period)
 _X_  incorrect                         _X_  Only some data fields affected
 ___  wrong calibration
 ___  others

 Discussion of Problem:

On November 2, 1995 the changeout for annual calibration occurred at E7,
Elk Falls, KS.  SEBS unit 9 was removed and unit 12 was installed.  Between
1530 and 1930 GMT no data was collected.  The soil moisture probes were
shipped dry from the vendor.  Site operations did not realize this and
installed them without wetting the bags that hold the soil moisture probes
in soil.  The water did not penetrate into the bags of soil.  Therefore, some
soil moisture probe outputs were initially offscale.  Different soil
moisture probes indicated offscale at different times until 28 November
1995.  On 28 November, site operations soaked the soil moisture probe bags
with water, causing the soil moisture data values to come on scale.

No data was collected during the time of the installation on November 2,
between 1530 and 1930 GMT.

The incorrect soil moisture after SEBS 12 was installed affected numerous
data values including:

15 minute:  rr_sm1, rr_sm2, rr_sm3, rr_sm4, rr_sm5

30 minute:  h, e, ave_shf, shf1, shf2, shf3, shf4, shf5, sm1, sm2, sm3,
            sm4, sm5, cs1, cs2, cs3, cs4, cs5, ces1, ces2, ces3, ces4,
            g1, g2, g3, g4, g5.

Inspection of the data readily shows which soil moisture probes were
offscale.  When one or more were offscale, the e, h, and ave_shf data and the
respective numbered data variables above were incorrect.  h and e can be
recalculated using only correct soil moisture probe values and equations shown
in many previous DQRs.


Other observations/measurements impacted by this problem:

see above

Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data with this comment.

Data Processing Notes                Date

-------------------------------------------------------------------
END

• lon(lon)
• Time offset from base_time(time_offset)
• -180.0 - +180.0(alt)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• Top relative humidity (fractional)(rh_top_fraction)
• North Latitude(lat)
• Reference temperature in enclosure(temp_reference)
• Top vapor pressure(vapor_pressure_top)
• Wind speed arithmetic mean(wspd_arith_mean)
• Bottom air temperature(temp_air_bottom)
• Wind direction vector mean(wdir_vec_mean)
• AEM position indicator(home_signal)
• Top T/RH sensor temperature(temp_trh_top)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Wind speed vector mean(wspd_vec_mean)
• base time in epoch(base_time)
• Top air temperature(temp_air_top)
• Bottom vapor pressure(vapor_pressure_bottom)
• Wind direction vector mean standard deviation(wdir_vec_std)
• Atmospheric pressure(atmos_pressure)
• Net radiation(net_radiation)

• Top vapor pressure(vapor_pressure_top)
• Top T/RH sensor temperature(temp_trh_top)
• Top air temperature(temp_air_top)
• Net radiation(net_radiation)
• Bowen ratio(bowen_ratio)
• Soil heat capacity 2(soil_heat_capacity_2)
• Soil heat capacity 1(soil_heat_capacity_1)
• Soil heat flow 3(soil_heat_flow_3)
• Soil heat capacity 5(soil_heat_capacity_5)
• Soil heat flow 4(soil_heat_flow_4)
• Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
• Soil heat capacity 4(soil_heat_capacity_4)
• Soil heat flow 5(soil_heat_flow_5)
• Soil heat capacity 3(soil_heat_capacity_3)
• Reference temperature in enclosure(temp_reference)
• Soil heat flow 1(soil_heat_flow_1)
• Soil heat flow 2(soil_heat_flow_2)
• lon(lon)
• Surface latent heat flux(latent_heat_flux)
• Wind speed vector mean(wspd_vec_mean)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• AEM position indicator 15 to 30 mins(home_signal_30)
• Change in energy storage 5, 0-5 cm soil layer(energy_storage_change_5)
• Change in energy storage 3, 0-5 cm soil layer(energy_storage_change_3)
• base time in epoch(base_time)
• Change in energy storage 4, 0-5 cm soil layer(energy_storage_change_4)
• Change in energy storage 1, 0-5 cm soil layer(energy_storage_change_1)
• Change in energy storage 2, 0-5 cm soil layer(energy_storage_change_2)
• Soil moisture 1, gravimetric(soil_moisture_1)
• Bottom air temperature(temp_air_bottom)
• Soil temperature 1(soil_temp_1)
• Soil moisture 4, gravimetric(soil_moisture_4)
• Soil moisture 5, gravimetric(soil_moisture_5)
• Soil moisture 2, gravimetric(soil_moisture_2)
• Soil moisture 3, gravimetric(soil_moisture_3)
• Wind speed arithmetic mean(wspd_arith_mean)
• Bottom vapor pressure(vapor_pressure_bottom)
• Wind direction vector mean standard deviation(wdir_vec_std)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Atmospheric pressure(atmos_pressure)
• Surface sensible heat flux(sensible_heat_flux)
• Soil temperature 2(soil_temp_2)
• Soil temperature mean 3(soil_temp_3)
• Half hour averaged soil temperature 4(soil_temp_4)
• Half hour averaged soil temperature 5(soil_temp_5)
• Wind direction vector mean(wdir_vec_mean)
• North Latitude(lat)
• Surface soil heat flux 4(surface_soil_heat_flux_4)
• Surface soil heat flux 5(surface_soil_heat_flux_5)
• Surface soil heat flux 2(surface_soil_heat_flux_2)
• Surface soil heat flux 3(surface_soil_heat_flux_3)
• Time offset from base_time(time_offset)
• Surface soil heat flux 1(surface_soil_heat_flux_1)
• Soil heat flow 2, corrected for soil moisture(corr_soil_heat_flow_2)
• Soil heat flow 3, corrected for soil moisture(corr_soil_heat_flow_3)
• Soil heat flow 4, corrected for soil moisture(corr_soil_heat_flow_4)
• Soil heat flow 5, corrected for soil moisture(corr_soil_heat_flow_5)
• Top relative humidity (fractional)(rh_top_fraction)
• AEM position indicator 0 to 15 mins(home_signal_15)
• Soil heat flow 1, corrected for soil moisture(corr_soil_heat_flow_1)
• -180.0 - +180.0(alt)