netcdf sgp30ecorA6.a1.20031026.000000 {
dimensions:
	time = UNLIMITED ; // (3 currently)
variables:
	int base_time ;
		base_time:string = "26-Oct-2003 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" ;
	double time_offset(time) ;
		time_offset:long_name = "Time offset from base_time" ;
		time_offset:units = "seconds since 26-Oct-2003 00:00:00 0:00" ;
		time_offset:uncertainty = "" ;
		time_offset:threshold = "" ;
		time_offset:valid_min = 0.f ;
		time_offset:valid_max = 86400.f ;
		time_offset:resolution = 1.f ;
		time_offset:missing_value = -9999.f ;
	float mean_u(time) ;
		mean_u:long_name = "Down-boom wind velocity (u)" ;
		mean_u:units = "m/s" ;
		mean_u:uncertainty = "0.05" ;
		mean_u:threshold = "" ;
		mean_u:valid_min = -20.f ;
		mean_u:valid_max = 20.f ;
		mean_u:resolution = 0.01f ;
		mean_u:missing_value = -9999.f ;
	float cvar_uu(time) ;
		cvar_uu:long_name = "u variance" ;
		cvar_uu:units = "(m/s)^2" ;
		cvar_uu:uncertainty = "" ;
		cvar_uu:threshold = "" ;
		cvar_uu:valid_min = 0.f ;
		cvar_uu:valid_max = 3.f ;
		cvar_uu:resolution = 0.01f ;
		cvar_uu:missing_value = -9999.f ;
	float cvar_uw(time) ;
		cvar_uw:long_name = "uw covariance" ;
		cvar_uw:units = "(m/s)^2" ;
		cvar_uw:uncertainty = "" ;
		cvar_uw:threshold = "" ;
		cvar_uw:valid_min = -1.f ;
		cvar_uw:valid_max = 0.4f ;
		cvar_uw:resolution = 0.01f ;
		cvar_uw:missing_value = -9999.f ;
	float mean_v(time) ;
		mean_v:long_name = "Cross-boom wind velocity (v)" ;
		mean_v:units = "m/s" ;
		mean_v:uncertainty = "0.05" ;
		mean_v:threshold = "" ;
		mean_v:valid_min = -20.f ;
		mean_v:valid_max = 20.f ;
		mean_v:resolution = 0.01f ;
		mean_v:missing_value = -9999.f ;
	float cvar_vv(time) ;
		cvar_vv:long_name = "v variance" ;
		cvar_vv:units = "(m/s)^2" ;
		cvar_vv:uncertainty = "" ;
		cvar_vv:threshold = "" ;
		cvar_vv:valid_min = 0.f ;
		cvar_vv:valid_max = 3.f ;
		cvar_vv:resolution = 0.01f ;
		cvar_vv:missing_value = -9999.f ;
	float cvar_vw(time) ;
		cvar_vw:long_name = "vw covariance" ;
		cvar_vw:units = "(m/s)^2" ;
		cvar_vw:uncertainty = "" ;
		cvar_vw:threshold = "" ;
		cvar_vw:valid_min = -1.f ;
		cvar_vw:valid_max = 0.2f ;
		cvar_vw:resolution = 0.01f ;
		cvar_vw:missing_value = -9999.f ;
	float mean_w(time) ;
		mean_w:long_name = "Vertical wind velocity (w)" ;
		mean_w:units = "m/s" ;
		mean_w:uncertainty = "0.05" ;
		mean_w:threshold = "" ;
		mean_w:valid_min = -3.f ;
		mean_w:valid_max = 3.f ;
		mean_w:resolution = 0.01f ;
		mean_w:missing_value = -9999.f ;
	float cvar_ww(time) ;
		cvar_ww:long_name = "w variance" ;
		cvar_ww:units = "(m/s)^2" ;
		cvar_ww:uncertainty = "" ;
		cvar_ww:threshold = "" ;
		cvar_ww:valid_min = 0.f ;
		cvar_ww:valid_max = 2.f ;
		cvar_ww:resolution = 0.01f ;
		cvar_ww:missing_value = -9999.f ;
	float var_ww(time) ;
		var_ww:long_name = "w variance" ;
		var_ww:units = "(m/s)^2" ;
		var_ww:uncertainty = "" ;
		var_ww:threshold = "" ;
		var_ww:valid_min = 0.f ;
		var_ww:valid_max = 2.f ;
		var_ww:resolution = 0.01f ;
		var_ww:missing_value = -9999.f ;
	float mean_t(time) ;
		mean_t:long_name = "Virtual temperature (T)" ;
		mean_t:units = "C" ;
		mean_t:uncertainty = "0.05" ;
		mean_t:threshold = "" ;
		mean_t:valid_min = -20.f ;
		mean_t:valid_max = 50.f ;
		mean_t:resolution = 0.01f ;
		mean_t:missing_value = -9999.f ;
	float cvar_tt(time) ;
		cvar_tt:long_name = "virtual temperature variance" ;
		cvar_tt:units = "(C)^2" ;
		cvar_tt:uncertainty = "" ;
		cvar_tt:threshold = "" ;
		cvar_tt:valid_min = 0.f ;
		cvar_tt:valid_max = 1.f ;
		cvar_tt:resolution = 0.01f ;
		cvar_tt:missing_value = -9999.f ;
	float cvar_wt(time) ;
		cvar_wt:long_name = "wT covariance" ;
		cvar_wt:units = "(m/s)(C)" ;
		cvar_wt:uncertainty = "" ;
		cvar_wt:threshold = "" ;
		cvar_wt:valid_min = -0.05f ;
		cvar_wt:valid_max = 0.5f ;
		cvar_wt:resolution = 0.01f ;
		cvar_wt:missing_value = -9999.f ;
	float mean_q(time) ;
		mean_q:long_name = "Water vapor density (q)" ;
		mean_q:units = "g/m^3" ;
		mean_q:uncertainty = "0.05" ;
		mean_q:threshold = "" ;
		mean_q:valid_min = 0.f ;
		mean_q:valid_max = 35.f ;
		mean_q:resolution = 0.05f ;
		mean_q:missing_value = -9999.f ;
	float cvar_qq(time) ;
		cvar_qq:long_name = "q variance " ;
		cvar_qq:units = "(g/m^3)^2" ;
		cvar_qq:uncertainty = "" ;
		cvar_qq:threshold = "" ;
		cvar_qq:valid_min = 0.f ;
		cvar_qq:valid_max = 1.f ;
		cvar_qq:resolution = 0.01f ;
		cvar_qq:missing_value = -9999.f ;
	float cvar_qw(time) ;
		cvar_qw:long_name = "wq covariance" ;
		cvar_qw:units = "(g/m^3)(m/s)" ;
		cvar_qw:uncertainty = "" ;
		cvar_qw:threshold = "" ;
		cvar_qw:valid_min = -0.05f ;
		cvar_qw:valid_max = 0.2f ;
		cvar_qw:resolution = 0.01f ;
		cvar_qw:missing_value = -9999.f ;
	float mean_co2(time) ;
		mean_co2:long_name = "Carbon dioxide concentration" ;
		mean_co2:units = "g/m^3" ;
		mean_co2:uncertainty = "0.05" ;
		mean_co2:threshold = "" ;
		mean_co2:valid_min = 0.f ;
		mean_co2:valid_max = 35.f ;
		mean_co2:resolution = 0.05f ;
		mean_co2:missing_value = -9999.f ;
	float cvar_cc(time) ;
		cvar_cc:long_name = "CO2 variance" ;
		cvar_cc:units = "(g/m^3)^2" ;
		cvar_cc:uncertainty = "" ;
		cvar_cc:threshold = "" ;
		cvar_cc:valid_min = 0.f ;
		cvar_cc:valid_max = 1.f ;
		cvar_cc:resolution = 0.01f ;
		cvar_cc:missing_value = -9999.f ;
	float cvar_cw(time) ;
		cvar_cw:long_name = "CO2w covariance" ;
		cvar_cw:units = "(g/(m^2s)^2" ;
		cvar_cw:uncertainty = "" ;
		cvar_cw:threshold = "" ;
		cvar_cw:valid_min = -1.f ;
		cvar_cw:valid_max = 0.2f ;
		cvar_cw:resolution = 0.01f ;
		cvar_cw:missing_value = -9999.f ;
	float mean_s(time) ;
		mean_s:long_name = "Horizontal wind speed (s)" ;
		mean_s:units = "m/s" ;
		mean_s:uncertainty = "0.05" ;
		mean_s:threshold = "" ;
		mean_s:valid_min = 0.f ;
		mean_s:valid_max = 30.f ;
		mean_s:resolution = 0.01f ;
		mean_s:missing_value = -9999.f ;
	float cvar_ss(time) ;
		cvar_ss:long_name = "s variance from aves" ;
		cvar_ss:units = "(m/s)^2" ;
		cvar_ss:uncertainty = "" ;
		cvar_ss:threshold = "" ;
		cvar_ss:valid_min = 0.f ;
		cvar_ss:valid_max = 3.f ;
		cvar_ss:resolution = 0.01f ;
		cvar_ss:missing_value = -9999.f ;
	float cvar_sw(time) ;
		cvar_sw:long_name = "sw covariance from aves" ;
		cvar_sw:units = "(m/s)^2" ;
		cvar_sw:uncertainty = "" ;
		cvar_sw:threshold = "" ;
		cvar_sw:valid_min = -1.f ;
		cvar_sw:valid_max = 0.2f ;
		cvar_sw:resolution = 0.01f ;
		cvar_sw:missing_value = -9999.f ;
	float vaws(time) ;
		vaws:long_name = "Vector-averaged wind speed" ;
		vaws:units = "m/s" ;
		vaws:uncertainty = "0.01" ;
		vaws:threshold = "" ;
		vaws:valid_min = 0.f ;
		vaws:valid_max = 30.f ;
		vaws:resolution = 0.01f ;
		vaws:missing_value = -9999.f ;
	float vawd(time) ;
		vawd:long_name = "Vector-averaged wind direction" ;
		vawd:units = "deg" ;
		vawd:uncertainty = "0.5" ;
		vawd:threshold = "" ;
		vawd:valid_min = 0.f ;
		vawd:valid_max = 360.f ;
		vawd:resolution = 0.05f ;
		vawd:missing_value = -9999.f ;
	float phi(time) ;
		phi:long_name = "Vertical angle of wind" ;
		phi:units = "deg" ;
		phi:uncertainty = "0.05" ;
		phi:threshold = "" ;
		phi:valid_min = -5.f ;
		phi:valid_max = 5.f ;
		phi:resolution = 0.05f ;
		phi:missing_value = -9999.f ;
	float ustar(time) ;
		ustar:long_name = "Friction velocity" ;
		ustar:units = "m/s)" ;
		ustar:uncertainty = "" ;
		ustar:threshold = "" ;
		ustar:valid_min = 0.f ;
		ustar:valid_max = 4.f ;
		ustar:resolution = 0.1f ;
		ustar:missing_value = -9999.f ;
	float h(time) ;
		h:long_name = "Sensible heat flux" ;
		h:units = "W/m^2" ;
		h:uncertainty = "2.0" ;
		h:threshold = "" ;
		h:valid_min = -600.f ;
		h:valid_max = 100.f ;
		h:resolution = 1.f ;
		h:missing_value = -9999.f ;
	float le(time) ;
		le:long_name = "Latent heat flux" ;
		le:units = "-550,+100" ;
		le:uncertainty = "2.0" ;
		le:threshold = "" ;
		le:valid_min = -600.f ;
		le:valid_max = 100.f ;
		le:resolution = 1.f ;
		le:missing_value = -9999.f ;
	float lat ;
		lat:long_name = "north latitude" ;
		lat:units = "degrees" ;
		lat:valid_min = -90.f ;
		lat:valid_max = 90.f ;
		lat:resolution = 0.001f ;
		lat:missing_value = -9999.f ;
	float lon ;
		lon:long_name = "east longitude" ;
		lon:units = "degrees" ;
		lon:valid_min = -180.f ;
		lon:valid_max = 180.f ;
		lon:resolution = 0.001f ;
		lon:missing_value = -9999.f ;
	float alt ;
		alt:long_name = "altitude above sea level" ;
		alt:units = "meters" ;
		alt:valid_min = 0.f ;
		alt:valid_max = 10000.f ;
		alt:resolution = 1.f ;
		alt:missing_value = -9999.f ;

// global attributes:
		:reported\ time = "The time assigned to a data point indicates the beginning of an averaging period" ;
		:sensor\ heights\ \(agl\) = "Sensor heights 2 m above base" ;
		:raw\ sample\ interval = "0.05 sec" ;
		:qc = "Visual inspection of data with reports of suspect data periods in ABLELOG" ;
		:site\ exposure = "Open field of grazed grass" ;
		:site\  = "able,sgp" ;
		:site\ facility = "Oxford         " ;
		:average\ interval = "First 27 minute of each half hour" ;
		:comment = "This system is deployed in the middle of a grazed grass field using omnidirectional sensors.\n",
			"The resolution field attributes refer to the number of significant,\n",
			"digits relative to the decimal point that should be used in\n",
			"calculations.  Using fewer digits might result in greater uncertainty.\n",
			"Using a larger number of digits should have no effect and thus is\n",
			"unnecessary.  However, analyses based on differences in values with\n",
			"a larger number of significant digits than indicated could lead to\n",
			"erroneous results or misleading scientific conclusions.\n",
			"\n",
			"Positive flux is defined as into the soil (downward)." ;
}