NetCDF File Header Example

Table of contents
No headers

Here's an example: the public file for the JPL2007 site contains the following fields:

$ ncdump -h jc20070731_20080622.public.nc 
netcdf jc20070731_20080622.public {
dimensions:
	a20 = 20 ;
	a32 = 32 ;
	a4 = 4 ;
	ak_P_hPa = 71 ;
	ak_zenith = 16 ;
	time = 84568 ;
	prior_date = 298 ;
	prior_Height = 71 ;
variables:
	float zobs_km(time) ;
		zobs_km:description = "Geometric Altitude (km)" ;
		zobs_km:units = "km" ;
		zobs_km:missing_value = -1.e+38f ;
		zobs_km:name = "zobs_km" ;
	float zmin_km(time) ;
		zmin_km:description = "Pressure Altitude (km)" ;
		zmin_km:units = "km" ;
		zmin_km:missing_value = -1.e+38f ;
		zmin_km:name = "zmin_km" ;
	int year(time) ;
		year:missing_value = -32768 ;
		year:description = "Year (e.g. (2009))" ;
		year:name = "year" ;
	float xn2o_ppb_error(time) ;
		xn2o_ppb_error:description = "one-sigma precision" ;
		xn2o_ppb_error:units = "ppb" ;
		xn2o_ppb_error:missing_value = -1.e+38f ;
		xn2o_ppb_error:name = "xn2o_ppb_error" ;
	float xn2o_ppb(time) ;
		xn2o_ppb:description = "0.2095*column_n2o/column_o2" ;
		xn2o_ppb:units = "ppb" ;
		xn2o_ppb:missing_value = -1.e+38f ;
		xn2o_ppb:name = "xn2o_ppb" ;
	float xhf_ppt_error(time) ;
		xhf_ppt_error:description = "one-sigma precision" ;
		xhf_ppt_error:units = "ppt" ;
		xhf_ppt_error:missing_value = -1.e+38f ;
		xhf_ppt_error:name = "xhf_ppt_error" ;
	float xhf_ppt(time) ;
		xhf_ppt:description = "0.2095*column_hf/column_o2" ;
		xhf_ppt:units = "ppt" ;
		xhf_ppt:missing_value = -1.e+38f ;
		xhf_ppt:name = "xhf_ppt" ;
	float xhdo_ppm_error(time) ;
		xhdo_ppm_error:description = "one-sigma precision" ;
		xhdo_ppm_error:units = "ppm" ;
		xhdo_ppm_error:missing_value = -1.e+38f ;
		xhdo_ppm_error:name = "xhdo_ppm_error" ;
	float xhdo_ppm(time) ;
		xhdo_ppm:description = "0.2095*column_hdo/column_o2" ;
		xhdo_ppm:units = "ppm" ;
		xhdo_ppm:missing_value = -1.e+38f ;
		xhdo_ppm:name = "xhdo_ppm" ;
	float xh2o_ppm_error(time) ;
		xh2o_ppm_error:description = "one-sigma precision" ;
		xh2o_ppm_error:units = "ppm" ;
		xh2o_ppm_error:missing_value = -1.e+38f ;
		xh2o_ppm_error:name = "xh2o_ppm_error" ;
	float xh2o_ppm(time) ;
		xh2o_ppm:description = "0.2095*column_h2o/column_o2" ;
		xh2o_ppm:units = "ppm" ;
		xh2o_ppm:missing_value = -1.e+38f ;
		xh2o_ppm:name = "xh2o_ppm" ;
	float xco_ppb_error(time) ;
		xco_ppb_error:description = "one-sigma precision" ;
		xco_ppb_error:units = "ppb" ;
		xco_ppb_error:missing_value = -1.e+38f ;
		xco_ppb_error:name = "xco_ppb_error" ;
	float xco_ppb(time) ;
		xco_ppb:description = "0.2095*column_co/column_o2" ;
		xco_ppb:units = "ppb" ;
		xco_ppb:missing_value = -1.e+38f ;
		xco_ppb:name = "xco_ppb" ;
	float xco2_ppm_error(time) ;
		xco2_ppm_error:description = "one-sigma precision" ;
		xco2_ppm_error:units = "ppm" ;
		xco2_ppm_error:missing_value = -1.e+38f ;
		xco2_ppm_error:name = "xco2_ppm_error" ;
	float xco2_ppm(time) ;
		xco2_ppm:description = "0.2095*column_co2/column_o2" ;
		xco2_ppm:units = "ppm" ;
		xco2_ppm:missing_value = -1.e+38f ;
		xco2_ppm:name = "xco2_ppm" ;
	float xch4_ppm_error(time) ;
		xch4_ppm_error:description = "one-sigma precision" ;
		xch4_ppm_error:units = "ppm" ;
		xch4_ppm_error:missing_value = -1.e+38f ;
		xch4_ppm_error:name = "xch4_ppm_error" ;
	float xch4_ppm(time) ;
		xch4_ppm:description = "0.2095*column_ch4/column_o2" ;
		xch4_ppm:units = "ppm" ;
		xch4_ppm:missing_value = -1.e+38f ;
		xch4_ppm:name = "xch4_ppm" ;
	float wspd_m_s(time) ;
		wspd_m_s:description = "Wind Speed (m/s)" ;
		wspd_m_s:units = "m/s" ;
		wspd_m_s:missing_value = -1.e+38f ;
		wspd_m_s:name = "wspd_m/s" ;
	float wdir_deg(time) ;
		wdir_deg:description = "Wind Direction (deg.)" ;
		wdir_deg:units = "deg" ;
		wdir_deg:missing_value = -1.e+38f ;
		wdir_deg:name = "wdir_deg" ;
	float tout_C(time) ;
		tout_C:description = "External Temperature (C)" ;
		tout_C:units = "C" ;
		tout_C:missing_value = -1.e+38f ;
		tout_C:name = "tout_C" ;
	double time(time) ;
		time:units = "days" ;
		time:description = "Fractional days since 1970/1/1 00:00:00" ;
		time:name = "time" ;
	float sia_AU(time) ;
		sia_AU:description = "Solar Intensity (Average)" ;
		sia_AU:units = "AU" ;
		sia_AU:missing_value = -1.e+38f ;
		sia_AU:name = "sia_AU" ;
	float pout_hPa(time) ;
		pout_hPa:description = "External Surface Pressure (hPa)" ;
		pout_hPa:units = "hPa" ;
		pout_hPa:missing_value = -1.e+38f ;
		pout_hPa:name = "pout_hPa" ;
	float long_deg(time) ;
		long_deg:description = "Longitude (deg.)" ;
		long_deg:units = "deg" ;
		long_deg:missing_value = -1.e+38f ;
		long_deg:name = "long_deg" ;
	float lat_deg(time) ;
		lat_deg:description = "Latitude (deg.)" ;
		lat_deg:units = "deg" ;
		lat_deg:missing_value = -1.e+38f ;
		lat_deg:name = "lat_deg" ;
	float hout_RH(time) ;
		hout_RH:description = "External Humidity (%)" ;
		hout_RH:units = "%RH" ;
		hout_RH:missing_value = -1.e+38f ;
		hout_RH:name = "hout_%RH" ;
	float hour(time) ;
		hour:missing_value = -1.e+38f ;
		hour:description = "Fractional UT Hour" ;
		hour:name = "hour" ;
	float fvsi(time) ;
		fvsi:description = "Fractional Variation in Solar Intensity (%)" ;
		fvsi:units = "%" ;
		fvsi:missing_value = -1.e+38f ;
		fvsi:name = "fvsi_%" ;
	int day(time) ;
		day:missing_value = -32768 ;
		day:description = "Day of the year (1-366)" ;
		day:name = "day" ;
	float azim_deg(time) ;
		azim_deg:description = "Solar Azimuth Angle (deg)" ;
		azim_deg:units = "deg" ;
		azim_deg:missing_value = -1.e+38f ;
		azim_deg:name = "azim_deg" ;
	float asza_deg(time) ;
		asza_deg:description = "Solar Zenith Angle (deg)" ;
		asza_deg:units = "deg" ;
		asza_deg:missing_value = -1.e+38f ;
		asza_deg:name = "asza_deg" ;
	char GSETUP_Version(time, a4) ;
		GSETUP_Version:description = "GSETUP Version Number" ;
		GSETUP_Version:name = "GSETUP_Version" ;
	char GFIT_Version(time, a4) ;
		GFIT_Version:description = "GFIT Version Number" ;
		GFIT_Version:name = "GFIT_Version" ;
	int prior_date_index(time) ;
		prior_date_index:units = "Index starting at 0" ;
		prior_date_index:missing_value = -32768 ;
		prior_date_index:description = "Index of date in main array" ;
		prior_date_index:name = "prior_date_index" ;
	double prior_date(prior_date) ;
		prior_date:units = "Fractional days since 1970/1/1 00:00:00" ;
		prior_date:name = "prior_date" ;
		prior_date:description = "Date of the a priori profile" ;
	double prior_Height(prior_Height) ;
		prior_Height:units = "km" ;
		prior_Height:name = "prior_Height" ;
		prior_Height:description = "A priori altitude profile" ;
	int prior_year(prior_date) ;
		prior_year:name = "prior_year" ;
		prior_year:description = "Year of the a priori profile (e.g. 2009)" ;
	double prior_n2o(prior_date, prior_Height) ;
		prior_n2o:units = "ppb" ;
		prior_n2o:name = "prior_n2o" ;
		prior_n2o:description = "A priori N2O profile" ;
	int prior_month(prior_date) ;
		prior_month:name = "prior_month" ;
		prior_month:description = "Month of the a priori profile (e.g. March is 03)" ;
	double prior_hf(prior_date, prior_Height) ;
		prior_hf:units = "ppt" ;
		prior_hf:name = "prior_hf" ;
		prior_hf:description = "A priori HF profile" ;
	double prior_hdo(prior_date, prior_Height) ;
		prior_hdo:units = "parts" ;
		prior_hdo:name = "prior_hdo" ;
		prior_hdo:description = "A priori HDO profile" ;
	double prior_h2o(prior_date, prior_Height) ;
		prior_h2o:units = "parts" ;
		prior_h2o:name = "prior_h2o" ;
		prior_h2o:description = "A priori H2O profile" ;
	double prior_gravity(prior_date, prior_Height) ;
		prior_gravity:units = "m/s^2" ;
		prior_gravity:name = "prior_gravity" ;
		prior_gravity:description = "Gravitational acceleration" ;
	int prior_day(prior_date) ;
		prior_day:name = "prior_day" ;
		prior_day:description = "Day of the month of the a priori profile" ;
	double prior_co2(prior_date, prior_Height) ;
		prior_co2:units = "ppm" ;
		prior_co2:name = "prior_co2" ;
		prior_co2:description = "A priori CO2 profile" ;
	double prior_co(prior_date, prior_Height) ;
		prior_co:units = "ppb" ;
		prior_co:name = "prior_co" ;
		prior_co:description = "A priori CO profile" ;
	double prior_ch4(prior_date, prior_Height) ;
		prior_ch4:units = "ppb" ;
		prior_ch4:name = "prior_ch4" ;
		prior_ch4:description = "A priori CH4 profile" ;
	double prior_Temp(prior_date, prior_Height) ;
		prior_Temp:units = "K" ;
		prior_Temp:name = "prior_Temp" ;
		prior_Temp:description = "A priori temperature profile" ;
	double prior_Pressure(prior_date, prior_Height) ;
		prior_Pressure:units = "hPa" ;
		prior_Pressure:name = "prior_Pressure" ;
		prior_Pressure:description = "A priori pressure profile" ;
	double prior_Density(prior_date, prior_Height) ;
		prior_Density:units = "molecules/cm^3" ;
		prior_Density:name = "prior_Density" ;
		prior_Density:description = "A priori density profile" ;
	double ak_zenith(ak_zenith) ;
		ak_zenith:units = "degrees" ;
		ak_zenith:name = "ak_zenith" ;
		ak_zenith:description = "Column averaging kernel solar zenith angles" ;
	double ak_n2o(ak_P_hPa, ak_zenith) ;
		ak_n2o:name = "ak_n2o" ;
		ak_n2o:description = "N2O column averaging kernel profile" ;
	double ak_hf(ak_P_hPa, ak_zenith) ;
		ak_hf:name = "ak_hf" ;
		ak_hf:description = "HF column averaging kernel profile" ;
	double ak_hdo(ak_P_hPa, ak_zenith) ;
		ak_hdo:name = "ak_hdo" ;
		ak_hdo:description = "HDO column averaging kernel profile" ;
	double ak_h2o(ak_P_hPa, ak_zenith) ;
		ak_h2o:name = "ak_h2o" ;
		ak_h2o:description = "H2O column averaging kernel profile" ;
	double ak_co2(ak_P_hPa, ak_zenith) ;
		ak_co2:name = "ak_co2" ;
		ak_co2:description = "CO2 column averaging kernel profile" ;
	double ak_co(ak_P_hPa, ak_zenith) ;
		ak_co:name = "ak_co" ;
		ak_co:description = "CO column averaging kernel profile" ;
	double ak_ch4(ak_P_hPa, ak_zenith) ;
		ak_ch4:name = "ak_ch4" ;
		ak_ch4:description = "CH4 column averaging kernel profile" ;
	double ak_P_hPa(ak_P_hPa) ;
		ak_P_hPa:name = "ak_P_hPa" ;
		ak_P_hPa:description = "Column averaging kernel pressure" ;

// global attributes:
		:More_Information = "https://tccon-wiki.caltech.edu" ;
		:TCCON_Reference = "Wunch, D., G. C. Toon, J.-F. L. Blavier, R. A. Washenfelder, J. Notholt, B. J. Connor, D. W. T. Griffith, V. Sherlock, and P. O. Wennberg (2011), The total carbon column observing network, Philosophical Transactions of the Royal Society - Series A: Mathematical, Physical and Engineering Sciences, 369(1943), 2087-2112, doi:10.1098/rsta.2010.0240. Available from: http://dx.doi.org/10.1098/rsta.2010.0240" ;
		:Data_Use_Policy = "https://tccon-wiki.caltech.edu/Network_Policy/Data_Use_Policy" ;
		:Auxiliary_Data_Description = "https://tccon-wiki.caltech.edu/Network_Policy/Data_Use_Policy/Auxiliary_Data" ;
		:Software_Version = "GGG2014" ;
		:id = "jc" ;
		:longName = "jpl01" ;
		:Contact = "Paul Wennberg <wennberg@gps.caltech.edu>" ;
		:Location = "Jet Propulsion Laboratory, Pasadena, California, USA" ;
		:Site_Reference = "Wunch, D., P. O. Wennberg, G. C. Toon, G. Keppel-Aleks, and Y. G. Yavin (2009), Emissions of greenhouse gases from a North American megacity, Geophysical Research Letters, 36(15), 1-5, doi:10.1029/2009GL039825. Available from: http://www.agu.org/pubs/crossref/2009/2009GL039825.shtml" ;
		:Data_DOI = "10.14291/tccon.ggg2014.jpl01.R0/1149163" ;
		:Data_Reference = "Wennberg, P. O., D. Wunch, Y. Yavin, G. C. Toon, J.-F. Blavier, N. Allen, G. Keppel-Aleks. 2014. TCCON data from Jet Propulsion Laboratory, Pasadena, California, USA, Release GGG2014R0. TCCON data archive, hosted by the Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.14291/tccon.ggg2014.jpl01.R0/1149163" ;
		:Data_Revision = "R0" ;
		:creation_date = "2014/06/13" ;
		:start_date = "2007/07/31" ;
		:end_date = "2008/06/22" ;
}

 

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