netcdf sgppgsC1.a1.20240502.000000 { dimensions: time = UNLIMITED ; // (90657 currently) variables: int base_time ; base_time:string = "2024-05-02 00:00:00 0:00" ; base_time:long_name = "Base time in Epoch" ; base_time:units = "seconds since 1970-1-1 0:00:00 0:00" ; base_time:ancillary_variables = "time_offset" ; double time_offset(time) ; time_offset:long_name = "Time offset from base_time" ; time_offset:units = "seconds since 2024-05-02 00:00:00 0:00" ; time_offset:ancillary_variables = "base_time" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2024-05-02 00:00:00 0:00" ; time:standard_name = "time" ; float cavity_pressure(time) ; cavity_pressure:long_name = "Picarro cavity pressure." ; cavity_pressure:units = "Torr" ; cavity_pressure:valid_min = 139.f ; cavity_pressure:valid_max = 141.f ; cavity_pressure:missing_value = -9999.f ; cavity_pressure:reject_condition = "(cavity_pressure<139 or cavity_pressure>141)" ; float cavity_temperature(time) ; cavity_temperature:long_name = "Picarro cavity temperature." ; cavity_temperature:units = "degC" ; cavity_temperature:valid_min = 35.f ; cavity_temperature:valid_max = 47.f ; cavity_temperature:missing_value = -9999.f ; cavity_temperature:reject_condition = "(cavity_temperature<35 or cavity_temperature>47)" ; float analyzer_temperature(time) ; analyzer_temperature:long_name = "Picarro analyzer temperature" ; analyzer_temperature:units = "degC" ; analyzer_temperature:valid_min = 35.f ; analyzer_temperature:valid_max = 47.f ; analyzer_temperature:missing_value = -9999.f ; float etalon_temperature(time) ; etalon_temperature:long_name = "Picarro etalon temperature" ; etalon_temperature:units = "degC" ; etalon_temperature:valid_min = 35.f ; etalon_temperature:valid_max = 47.f ; etalon_temperature:missing_value = -9999.f ; float warm_box_temperature(time) ; warm_box_temperature:long_name = "Picarro warm box temperature" ; warm_box_temperature:units = "degC" ; warm_box_temperature:valid_min = 35.f ; warm_box_temperature:valid_max = 47.f ; warm_box_temperature:missing_value = -9999.f ; int species(time) ; species:long_name = "Species being analyzed during sample" ; species:units = "unitless" ; species:missing_value = -9999 ; species:flag_values = 1, 2, 3 ; species:flag_meanings = "co2 ch4 h2o" ; float mp_valve_position(time) ; mp_valve_position:long_name = "Multi-port valve position indicates state of the rotary valco valve (range 1 to 8)" ; mp_valve_position:units = "unitless" ; mp_valve_position:valid_min = 1.f ; mp_valve_position:valid_max = 8.f ; mp_valve_position:missing_value = -9999.f ; mp_valve_position:comment_1 = "A value of 1 means the valve is set to inlet_sample_2m" ; mp_valve_position:comment_2 = "A value of 2 means the valve is set to inlet_sample_4m" ; mp_valve_position:comment_3 = "A value of 3 means the valve is set to inlet_sample_25m" ; mp_valve_position:comment_4 = "A value of 4 means the valve is set to inlet_sample_60m" ; mp_valve_position:comment_5 = "A value of 5 or 6 means the instrument is in a calibration state." ; mp_valve_position:comment_6 = "A value of 7 means the instrument is in a calibration check state." ; mp_valve_position:comment_7 = "Value 8 is not currently used" ; mp_valve_position:comment = "During a transition from one state to the next, the value will contain a fractional value." ; float outlet_valve(time) ; outlet_valve:long_name = "Outlet DAC (digital to analog converter) value for Picarro cavity pressure control" ; outlet_valve:units = "unitless" ; outlet_valve:valid_min = 40000.f ; outlet_valve:valid_max = 55000.f ; outlet_valve:comment = "The cavity pressure is electronically controlled by changing the size of the outlet valve at the output of the activity." ; outlet_valve:missing_value = -9999.f ; float solenoid_valve(time) ; solenoid_valve:long_name = "Value indicating which solenoid valve is currently used" ; solenoid_valve:units = "unitless" ; solenoid_valve:missing_value = -9999.f ; solenoid_valve:comment = "Not used in this system." ; float co2(time) ; co2:long_name = "Measured CO2 mole fraction" ; co2:units = "ppm" ; co2:valid_min = 360.f ; co2:valid_max = 700.f ; co2:missing_value = -9999.f ; co2:reject_condition = "(co2<360 or co2>700)" ; float co2_dry(time) ; co2_dry:long_name = "CO2 mole fraction with water correction" ; co2_dry:units = "ppm" ; co2_dry:valid_min = 360.f ; co2_dry:valid_max = 700.f ; co2_dry:missing_value = -9999.f ; float ch4(time) ; ch4:long_name = "Measured CH4 mole fraction" ; ch4:units = "ppm" ; ch4:valid_min = 1.6f ; ch4:valid_max = 3.f ; ch4:missing_value = -9999.f ; ch4:reject_condition = "(ch4 < 1.6 or ch4 > 3.0)" ; float ch4_dry(time) ; ch4_dry:long_name = "CH4 mole fraction with water correction" ; ch4_dry:units = "ppm" ; ch4_dry:valid_min = 1.6f ; ch4_dry:valid_max = 3.f ; ch4_dry:missing_value = -9999.f ; float h2o(time) ; h2o:long_name = "Measured water content" ; h2o:units = "%" ; h2o:valid_min = 0.f ; h2o:valid_max = 0.1f ; h2o:missing_value = -9999.f ; float lat ; lat:long_name = "North latitude" ; lat:units = "degree_N" ; lat:valid_min = -90.f ; lat:valid_max = 90.f ; lat:standard_name = "latitude" ; float lon ; lon:long_name = "East longitude" ; lon:units = "degree_E" ; lon:valid_min = -180.f ; lon:valid_max = 180.f ; lon:standard_name = "longitude" ; float alt ; alt:long_name = "Altitude above mean sea level" ; alt:units = "m" ; alt:standard_name = "altitude" ; // global attributes: :command_line = "pgs_ingest -s sgp -f C1" ; :Conventions = "ARM-1.1" ; :process_version = "ingest-pgs-1.2-0.el7" ; :dod_version = "pgs-a1-1.1" ; :input_source = "/data/collection/sgp/sgppgsC1.00/CFADS2362_20240502_0000_DataLog_User.dat" ; :site_id = "sgp" ; :platform_id = "pgs" ; :facility_id = "C1" ; :data_level = "a1" ; :location_description = "Southern Great Plains (SGP), Lamont, Oklahoma" ; :datastream = "sgppgsC1.a1" ; :heights = "2m, 4m, 25m, 60m" ; :sampling_interval = "1 second (approximately)" ; :collection_software = "LABVIEW 5.1" ; :mp_valve_position_explanation = "Use the mp_valve_position (multi-port valve position) field to determine how to interpret sequential values of the co2, co2_dry, ch4, ch4_dry and h2o fields. Values of mp_valve_position values of 1,2,3,4 correspond to data from 2m, 4m, 25m, and 60m respectively. mp_valve_position value 7 indicates that a target tank was used to check the system." ; :time_stamp_details = "Data for each channel is collected for 5 minutes. To avoid potential issues of system flushing, only the last minute of this 5 minute interval is used. The time stamp given currently reflects the middle of the 1 minutes sampling interval." ; :doi = "10.5439/1227960" ; :history = "created by user dsmgr on machine prod-proc4.adc.arm.gov at 2024-05-02 02:58:02, using ingest-pgs-1.2-0.el7" ; }