Invalid wind speed frozen sensor

ARM PROBLEM IDENTIFICATION FORM (PIF)

                            PIF No. P940301.4

Submitted By:        David R. Cook
    Organization:    Argonne National Laboratory
    Date Submitted:  March 1, 1994

Problem Description/Change Description.

o For Instrument Problems ONLY,
        Identify MODE of Operation:  Degraded

o Give a brief explanation with details, attach examples and any supporting
  information.  This should include a description of analysis leading to
  identification of problem and, if known, recommended action.


This is an informational PIF.

On February 23, 1994 the EBBR wind speed sensor at E7, Elk Falls, KS was
frozen to a stationary condition by ice.  Invalid data for the time period
indicated is:

30 minute: wind_s, res_ws

15 minute: wind_s

5 minute: wind_s, res_ws.


How may we contact you?
    e-mail:  cook@anler.er.anl.gov
    phone:   (708) 252-5840
    FAX:     (708) 252-9792

Submitter's Priority: 3
    [Critical-1   Very Important-2 Important-3 Inconvenient-4 Interesting-5]

Where was this Problem Identified: FI
    [Site Data System-SDS      Experiment Center-EC]
    [Archive-A At              Field Instrument-FI ]
    [During Data Analyis-DA    Other- List Location]

Does this PIF result in a Software Change Request?  NO
    Where:                     [ SDS,  EC, or  A ]

    Type:                      [Development-1 Problem-2  Enhancement-3]

    List Programs/Documents Affected:

    Configuration Identification:

Does problem impact data values or cause data loss?  Data Loss.
    which platform(s):  EBBR, E7, Elk Falls, KS

    Specify (or estimate) begin and end dates for data loss
          Begin Date    2/23/94   Time  1030  GMT
          End   Date    2/23/94   Time  1540  GMT

    Apparent cause of data loss, if known:   Ice

    SUGGESTED CAUSES:
    [human error, component failure, temperature, lightning          ]
    [foreign matter, power loss, software failure,                   ]
    [communications failure, modification difficulites, specify other]

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

• Soil heat flow 4 (mV)(soil_heat_flow_4_mv)
• Soil moisture 2 (resistance)(soil_moisture_2_r)
• lon(lon)
• Net radiation (mV)(net_radiation_mv)
• Soil temperature 1 (resistance ratio)(soil_temp_1_rr)
• Reference temperature in enclosure (resistance ratio)(temp_reference_rr)
• Battery voltage(battery_voltage)
• Soil moisture 5 (resistance)(soil_moisture_5_r)
• Right relative humidity (mV)(rh_right_mv)
• Soil temperature 3 (resistance ratio)(soil_temp_3_rr)
• Soil moisture 1 (resistance)(soil_moisture_1_r)
• Wind speed arithmetic mean(wspd_arith_mean)
• Soil heat flow 1 (mV)(soil_heat_flow_1_mv)
• Right air temperature(temp_air_right)
• Wind direction vector mean (mV)(wdir_vec_mean_mv)
• Soil moisture 4 (resistance)(soil_moisture_4_r)
• Left relative humidity (mV)(rh_left_mv)
• Soil temperature 5 (resistance ratio)(soil_temp_5_rr)
• Atmospheric pressure (mV)(atmos_pressure_mv)
• Left air temperature(temp_air_left)
• -180.0 - +180.0(alt)
• Soil heat flow 3 (mV)(soil_heat_flow_3_mv)
• North Latitude(lat)
• Soil temperature 2 (resistance ratio)(soil_temp_2_rr)
• Time offset from base_time(time_offset)
• Soil heat flow 2 (mV)(soil_heat_flow_2_mv)
• Soil moisture 3 (resistance)(soil_moisture_3_r)
• Right T/RH sensor temperature (resistance ratio)(temp_trh_right_rr)
• Left T/RH sensor temperature (resistance ratio)(temp_trh_left_rr)
• Soil temperature 4 (resistance ratio)(soil_temp_4_rr)
• Soil heat flow 5 (mV)(soil_heat_flow_5_mv)
• base time in epoch(base_time)
• AEM position indicator(home_signal)

• Top T/RH sensor temperature(temp_trh_top)
• Soil heat flow 3(soil_heat_flow_3)
• Soil heat flow 4(soil_heat_flow_4)
• Soil heat flow 5(soil_heat_flow_5)
• Soil heat flow 1(soil_heat_flow_1)
• Soil heat flow 2(soil_heat_flow_2)
• lon(lon)
• Wind speed vector mean(wspd_vec_mean)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• AEM position indicator 15 to 30 mins(home_signal_30)
• Wind speed arithmetic mean(wspd_arith_mean)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Wind direction vector mean standard deviation(wdir_vec_std)
• Atmospheric pressure(atmos_pressure)
• 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)
• Time offset from base_time(time_offset)
• Surface soil heat flux 3(surface_soil_heat_flux_3)
• 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)
• Top vapor pressure(vapor_pressure_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 capacity 5(soil_heat_capacity_5)
• Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
• Soil heat capacity 4(soil_heat_capacity_4)
• Soil heat capacity 3(soil_heat_capacity_3)
• Reference temperature in enclosure(temp_reference)
• Surface latent heat flux(latent_heat_flux)
• 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)
• Bottom vapor pressure(vapor_pressure_bottom)
• 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)
• -180.0 - +180.0(alt)