Attributes {
    site_name {
        String cf_role "timeseries_id";
        Int32 string_length 14;
    }
    time {
        String units "hours since 2015-01-01 00:00:00.0 UTC";
        String calendar "standard";
        String standard_name "time";
        String bounds "time_bnds";
    }
    time_bnds {
    }
    longitude {
        String standard_name "longitude";
        String long_name "site longitude";
        String units "degrees_east";
    }
    latitude {
        String standard_name "latitude";
        String long_name "site latitude";
        String units "degrees_north";
    }
    sampling_height {
        String long_name "height above ground level";
        String standard_name "height";
        String units "m";
        String positive "up";
        String axis "Z";
    }
    altitude {
        String long_name "height above sea level";
        String standard_name "height_above_mean_sea_level";
        String units "m";
    }
    Time_start {
        Float64 _FillValue -999.0000000000000;
        String units "d";
        String long_name "minimum fractional day of year of the measurement";
    }
    Time_stop {
        Float64 _FillValue -999.0000000000000;
        String units "d";
        String long_name "maximum fractional day of year of the measurement";
    }
    Year {
        Int32 _FillValue -999;
        String units "year";
        String long_name "year of the measurement";
    }
    DOY {
        Int32 _FillValue -999;
        String units "d";
        String long_name "day of year of the measurement";
    }
    Hour {
        Int32 _FillValue -999;
        String units "hour";
        String long_name "nominal hour of the measurement";
    }
    CO2 {
        Float64 _FillValue -999.0000000000000;
        String units "1e-6";
        String long_name "dry CO2 mixing ratio average between Time_start and Time_stop in parts per million by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    CO2_std {
        Float64 _FillValue -999.0000000000000;
        String units "1e-6";
        String long_name "dry CO2 mixing ratio standard deviation between Time_start and Time_stop in parts per million by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    CO2_unc {
        Float64 _FillValue -999.0000000000000;
        String units "1e-6";
        String long_name "estimated CO2 measurement uncertainty in parts per million by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    CH4 {
        Float64 _FillValue -999.0000000000000;
        String units "1e-9";
        String long_name "dry CH4 mixing ratio average between Time_start and Time_stop in parts per billion by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    CH4_std {
        Float64 _FillValue -999.0000000000000;
        String units "1e-9";
        String long_name "dry CH4 mixing ratio standard deviation between Time_start and Time_stop in parts per billion by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    CH4_unc {
        Float64 _FillValue -999.0000000000000;
        String units "1e-9";
        String long_name "estimated CH4 measurement uncertainty in parts per billion by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    CO {
        Float64 _FillValue -999.0000000000000;
        String units "1e-9";
        String long_name "dry CO mixing ratio average between Time_start and Time_stop in parts per billion by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    CO_std {
        Float64 _FillValue -999.0000000000000;
        String units "1e-9";
        String long_name "dry CO mixing ratio standard deviation between Time_start and Time_stop in parts per billion by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    CO_unc {
        Float64 _FillValue -999.0000000000000;
        String units "1e-9";
        String long_name "estimated CO measurement uncertainty in parts per billion by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    Data_Flag {
        Int32 _FillValue -999;
        String long_name "data quality indicator";
        String standard_name "status_flag";
        Int32 valid_range 0, 1;
        Int32 flag_values 0, 1;
        String flag_meanings "not_recommended_for_use no_known_problems";
    }
    H2O {
        Float64 _FillValue -999.0000000000000;
        String units "1e-2";
        String long_name "water vapor mixing ratio average of the dried sample between Time_start and Time_stop in parts per hundred by volume";
        String coordinates "time latitude longitude altitude site_name";
        String ancillary_variables "Data_Flag";
    }
    NC_GLOBAL {
        String project "Indianapolis flux project (INFLUX)";
        String funding "National Institute of Standards and Technology (NIST)";
        String station_name "INFLUX SITE 14 - Crawfordsville";
        String observation_category "Air sampling observation";
        String country_territory "USA";
        String contributor "PSU";
        String number_of_sampling_heights "1";
        String website "sites.psu.edu/influx/site-information/site-14-crawfordsville/";
        String parameter "CO2 / CO";
        String time_period "2017";
        String time_interval "hourly averages";
        String measurement_method "Cavity Ring Down Spectroscopy (PICARRO, INC.)";
        String sampling_type "in situ";
        String time_zone "EST;  data reported in UTC";
        String reference_scale "Traceable to NOAA scale";
        String title "In-situ tower greenhouse gas data (The Pennsylvania State University) at station Site 14 from 2017-04-26 to 2017-12-31";
        String ancillary_file_source "site14_level1_2017_conc.dat";
        String project_info "ACT-America";
        String institution "Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC)";
        String contact_info "https://daac.ornl.gov/ . E-mail: uso@daac.ornl.gov";
        String doi "10.3334/ORNLDAAC/1568";
        String stipulations_on_use "Data available with no restrictions.";
        String featureType "timeSeries";
        String Conventions "CF-1.6";
        String comment "Measurements are made with Picarro Inc. wavelength-scanned cavityring down spectroscopic instruments at multiple levels.  Hourly averages arereported here, with the minimum and maximum time included in the averageindicated.  The standard deviation within the averaging window is alsoreported.  All sites measuring CO are dried using a Nafion dryer and a dry airsource for purge.  As of late May 2013, all sites are dried.  A zero-offsetcorrection is applied daily, using data collected from 1 or 2 NOAA-calibratedtanks.   Round robin tests using 3-4 NOAA-calibrated tanks are conducted every1-2 years.  Results are then used to field calibrate the instruments (slope andintercept correction).";
        String abstract "The Indianapolis Flux Experiment (INFLUX) was designed to developand evaluate methods for the measurement and modeling of greenhouse gas fluxesfrom urban environments. Determination of greenhouse gas fluxes anduncertainty bounds is essential for the evaluation of the effectiveness ofmitigation strategies.  The INFLUX observation network includes twelve in-situtower-based, continuous measurements of CO2, a subset of five of whichadditionally measure CO, and a subset of nine of which additionally measure CH4.Flask sampling of 14CO2 and other trace gases occurs at six of the towers, andperiodic aircraft  flights measuring greenhouse gases and meteorologicalconditions are conducted. A total carbon column observing network (TCCON)column remote sensing station was deployed Aug - Dec 2012. Four of the towersites include eddy covariance and radiative flux  measurements, and a scanningDoppler lidar is located near Site 02.  The data from the towers, TCCON, andaircraft measurements are being used in an inverse-modeling approach to yieldestimates of the urban area flux at 1 km2 resolution. Additionally, very highspace/time resolution estimates of fossil fuel carbon emissions (Hestia project)offer state-of-the-art bottom-up emissions estimates for the city and itssurroundings.";
        String location "Tower base - 39.9971 N, 86.7396 W, 264 m ASL";
    }
}