For questions or information, contact the PI Dr. E. A. Kort at eakort@umich.edu and Dr. G. Plant at geplant@umich.edu All flights from F3UEL 2021 campaign are combined into a single file. Column names: Date Time.EPOCH Latitude Longitude Altitude.m. WindU.m.s. WindV.m.s. Temperature.C. RH.per. CH4.ppm. CO2.ppm. H2O.per. CO.ppm. O3.ppb. NO2.ppb. NO.ppb. Pressure.mb. Column descriptions: Date: date of flight (yyyymmdd) Time.EPOCH: seconds since 01/01/1970 Latitude: GPS latitude of measurement Longitude: GPS longitude of measurement Altitude.m.: Altitude in meters WindU.m.s.: U Wind speed in meters/second WindV.m.s.: V Wind speed in meters/second Temperature.C.: observed temperature in Celsius RH.per.: observed relative humidity (%) CH4.ppm.: observed methane in parts per million CO2.ppm.: observed carbon dioxide in parts per million H2O.per: Observed water vapor in percent CO.ppm.: observed carbon monoxide in parts per million O3.ppb.: observed ozone in parts per billion NO2.ppb.: observed NO2 in parts per billion NO.ppb.: observed NO in parts per billion Pressure.mb. observed pressure in mbar Data Notes: 1) Missing Value indicator = -9999 2) There are uncharacterized offsets in the NO and NO2 measurements. Accordingly, the NO & NO2 data is best suited for relative/differential form of analysis. Contact data creators for recommendations on addressing offset. Citation for this dataset: Kort, E., Plant, G., Brandt, A., Chen, Y., Gorchov Negron, A., Schwietzke, S., Smith, M., Zavala-Araiza, D. Aircraft Data (2021) for Flaring & Fossil Fuels: Uncovering Emissions & Losses (F3UEL) [Data set], University of Michigan - Deep Blue Data. https://doi.org/10.7302/6tgq-e116