netcdf sgpcoC1.b1.20111231.000232 {
dimensions:
	time = UNLIMITED ; // (288 currently)
variables:
	int base_time ;
		base_time:string = "31-Dec-2011, 00:00:00 GMT" ;
		base_time:long_name = "Base time in Epoch" ;
		base_time:units = "seconds since 1970-1-1 0:00:00 0:00 GMT" ;
	double time_offset(time) ;
		time_offset:long_name = "Time offset from base_time" ;
		time_offset:units = "seconds since 31-Dec-2011, 00:00:00 GMT" ;
	double time(time) ;
		time:long_name = "Time offset from midnight of date of file. For CO data, this is identical to time_offset and is included for compatibility." ;
		time:units = "seconds since 31-Dec-2011, 00:00:00 GMT" ;
	double yyyydddhhmmss(time) ;
		yyyydddhhmmss:long_name = "Date and time in alternate form" ;
		yyyydddhhmmss:units = "unitless" ;
		yyyydddhhmmss:comment = "yyyy-year, ddd-day of year, hh-hour, mm-min, ss-second" ;
	short year(time) ;
		year:long_name = "Year" ;
		year:units = "four digit year in Gregorian calendar" ;
	short month(time) ;
		month:long_name = "Month" ;
		month:units = "month of year" ;
	short day(time) ;
		day:long_name = "Day" ;
		day:units = "day of month" ;
	short hour(time) ;
		hour:long_name = "Hour" ;
		hour:units = "hour of day" ;
	short min(time) ;
		min:long_name = "Minute" ;
		min:units = "minute of hour" ;
	short sec(time) ;
		sec:long_name = "Second" ;
		sec:units = "second of minute" ;
	short channel(time) ;
		channel:long_name = "Sequential data channel number. See channel_explanation global attribute." ;
		channel:units = "unitless" ;
		channel:comment = "Sequential 0-5" ;
	float co(time) ;
		co:long_name = "Calculated CO concentration" ;
		co:units = "ppb" ;
		co:warn_condition = "(50ppb<CO<60ppb or 600ppb<CO<800ppb) or some other qc flags = 1" ;
		co:reject_condition = "(CO<50ppb or CO>800ppb) or some other qc flags = 2" ;
	short qc_co(time) ;
		qc_co:long_name = "Summary of qc flags." ;
		qc_co:units = "unitless" ;
		qc_co:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	float int_temp(time) ;
		int_temp:long_name = "Internal temperature" ;
		int_temp:units = "Degrees C" ;
		int_temp:warn_condition = "(25C<int_temp<30C or 40C<int_temp<45C)" ;
		int_temp:reject_condition = "(int_temp<25C or int_temp>45C)" ;
	short qc_int_temp(time) ;
		qc_int_temp:long_name = "QC flag for variable int_temp" ;
		qc_int_temp:units = "unitless" ;
		qc_int_temp:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	float chamber_temp(time) ;
		chamber_temp:long_name = "Chamber Temperature" ;
		chamber_temp:units = "Degrees Celcius" ;
		chamber_temp:warn_condition = "(35C<chamber_temp<42.5C or 47.5C<chamber_temp<55C)" ;
		chamber_temp:reject_condition = "(chamber_temp<35C or chamber_temp>55C)" ;
	short qc_chamber_temp(time) ;
		qc_chamber_temp:long_name = "QC flag for variable chamber_temp" ;
		qc_chamber_temp:units = "unitless" ;
		qc_chamber_temp:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	float agc(time) ;
		agc:long_name = "Automatic Gain Control" ;
		agc:units = "Hz" ;
		agc:warn_condition = "(1.9e5Hz<agc<1.95e5Hz or 2.05e5Hz<agc<2.1e5Hz)" ;
		agc:reject_condition = "(agc<1.9e5Hz or agc>2.1e5Hz)" ;
	short qc_agc(time) ;
		qc_agc:long_name = "QC flag for variable AGC" ;
		qc_agc:units = "unitless" ;
		qc_agc:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	short press_TE48C(time) ;
		press_TE48C:long_name = "Presure mesure by TE48C" ;
		press_TE48C:units = "Torr" ;
		press_TE48C:warn_condition = "(790Torr<press_TE48C<800Torr or 820Torr<press_TE48C<830Torr)" ;
		press_TE48C:reject_condition = "(press_TE48C<790Torr or press_TE48C>830Torr)" ;
	short qc_press_TE48C(time) ;
		qc_press_TE48C:long_name = "QC flag for variable press_TE48C" ;
		qc_press_TE48C:units = "unitless" ;
		qc_press_TE48C:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	float flow_TE48C(time) ;
		flow_TE48C:long_name = "Flow measure by TE48C" ;
		flow_TE48C:units = "LPM" ;
		flow_TE48C:warn_condition = "(0.4LPM<flow_TE48C<0.45LPM or 0.55LPM<flow_TE48C<0.6LPM)" ;
		flow_TE48C:reject_condition = "(flow_TE48C<0.4LPM or flow_TE48C>0.6LPM)" ;
	short qc_flow_TE48C(time) ;
		qc_flow_TE48C:long_name = "QC flag for variable flow_TE48C" ;
		qc_flow_TE48C:units = "unitless" ;
		qc_flow_TE48C:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	float press_control(time) ;
		press_control:long_name = "pressure measured by the pressure controller" ;
		press_control:units = "Torr" ;
		press_control:warn_condition = "(785Torr<press_control<795Torr or 805Torr<press_control<815Torr)" ;
		press_control:reject_condition = "(press_control<785Torr or press_control>815Torr)" ;
	short qc_press_control(time) ;
		qc_press_control:long_name = "QC flag for variable press_control" ;
		qc_press_control:units = "unitless" ;
		qc_press_control:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	float flow_control(time) ;
		flow_control:long_name = "flow measured by the flow controller" ;
		flow_control:units = "LPM" ;
		flow_control:warn_condition = "(0.4LPM<flow_control<0.45LPM or 0.55LPM<flow_control<1.0LPM)" ;
		flow_control:reject_condition = "(flow_control<0.4LPM or flow_control>1.0LPM)" ;
	short qc_flow_control(time) ;
		qc_flow_control:long_name = "QC flag for variable flow_control" ;
		qc_flow_control:units = "unitless" ;
		qc_flow_control:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	float dpt(time) ;
		dpt:long_name = "Dew Point Temperature" ;
		dpt:units = "Degrees Celcius" ;
		dpt:warn_condition = "(-15C<dpt<-10C)" ;
		dpt:reject_condition = "(dpt>-10C)" ;
	short qc_dpt(time) ;
		qc_dpt:long_name = "QC flag for variable dpt" ;
		qc_dpt:units = "unitless" ;
		qc_dpt:comment = "0=all qc ok, 1=some qc warned, 2=some qc rejected" ;
	float site_latitude ;
		site_latitude:long_name = "latitude of instrument tower" ;
		site_latitude:units = "degrees" ;
	float site_longitude ;
		site_longitude:long_name = "longitude of instrument tower" ;
		site_longitude:units = "degrees" ;
	float site_elevation ;
		site_elevation:long_name = "height of base of instrument tower" ;
		site_elevation:units = "meters above sea level" ;

// global attributes:
		:processing_date = "2012-Jan-3" ;
		:site_id = "sgp" ;
		:facility_id = "C1" ;
		:sds_mode = "b1" ;
		:height = "60m" ;
		:channel_explanation = "Sequential data channel number. Channel 0 corresponds to data from 60m. Channel 1 correspond to the offset of the instrument. Channels 3 and 4 correspond to calibration readings of 100 and 300 ppb.Channels 2 and 5 correspond to a check of the offset using 2 different CO-scrubbers and one of the span cylinders" ;
		:time_stamp_details = "Data for each channel is collected for 5 minutes. To avoid potential issues of system flushing, only the last 2 minutes seconds of this 5 minute interval are used. The time stamp given currently reflects the middle of the 2 minutes sampling interval." ;
		:QC_NOTE = "Please note that users interested only in CO concentrations should use data with qc_co equal to 0 or 1. The data marked with warning flag (qc=1) are still good, but give more information to those users interested in instrument performance." ;
		:sample_int = "5 seconds" ;
		:averaging_int = "120 seconds" ;
		:missing_value = "-9999" ;
		:collection_software = "LABVIEW 5.1" ;
		:contact_name = "Sebastien Biraud, Lawrence Berkeley National Laboratory (email: scbiraud@lbl.gov)" ;
		:PLEASE_READ_THIS = "For all publications and presentations, please acknowledge: U.S. Department of Energy as part of the Atmospheric Radiation Measurement Program. The automatic inclusion of a data originator as a co-author is not insisted upon in the ARM program, but the source of any data should be clearly recognized either as a co-author or through an appropriate acknowledgment.  The ARM/LBNL Carbon Project contact for this data set is Sebastien Biraud. Also please note that we may make adjustments to the data to incorporate adjustments to calibration scales or other issues.  Users should contact Sebastien Biraud to inquire about planned data releases and revisions. Whenever possible, we would appreciate receiving preprints for publications that use the data to insure that the quality and limitations of the data are accurately represented. Your questions and comments are welcome." ;
}