Thank you for your interest in the California Baseline Ozone Transport Study (CABOTS) ozonesonde dataset produced by the San José State University (SJSU) Department of Meteorology and Climate Science and SJSU’s Center for Applied Atmospheric Research and Education (CAARE). If you plan to use our data within a publication, we ask that you contact us at and the California Air Resources Board (CARB) during the preparation of your manuscript. This will ensure that the data is being used properly, the data is the most current version, and that the data is cited correctly. If the data comprises a significant portion of the manuscript or is used in figures, we ask to be considered for co-authorship of the publication. SJSU contacts: Sen.Chiao@sjsu.edu, Arthur.Eiserloh@sjsu.edu This document is a detailed description of the ozonesonde ‘fleout’ data files. The ‘fleout’ files contain ozonesonde data in its original vertical resolution. The ‘fleout’ data file names are formatted as such: stnXXX_yyyy_mm_dd_fleout.dat ‘stn’ represents the station abbreviation ‘XXX’ = the radiosonde launch number at that station ‘yyyy’ = year ‘mm’ = month ‘dd’ = day of the month Skysonde Software developed by NOAA/ESRL/GMD was used to post process the data. The first line of the ‘fleout’ file details the Skysonde version number used to process the sounding data file as well as the date processed. Header Label Descriptions Header lines = Number of lines in the header of the sounding data file Data columns = Number of columns in the sounding data file Flight number = The flight number begins with a two letter station abbreviation followed by the flight number (e.g. BU450) Date [GMT] = GMT Date of launch Time [GMT] = GMT Time of launch Location = Station name or nearest city to launch location Longitude = Longitude of launch location Latitude = Latitude of launch location Launch altitude (km) = Altitude of launch location in kilometers above sea level Surface pressure (mb) = Observed or measured surface pressure in millibars Surface temperature (deg) = Observed or measured surface temperature in degrees Celsius Surface humidity (%) = Observed or measured surface humidity in % *(The launch altitude, surface pressure, surface temperature, and surface humidity are the initial constraints used in the geopotential altitude calculation.) Turn altitude (km) = Altitude of balloon turn or burst in kilometers above sea level Turn pressure (mb) = Atmospheric pressure of balloon turn or burst in millibars Radiosonde number = Radiosonde serial number Radiation correction = States whether a solar radiation correction was applied to the temperature (e.g. Yes or No) Pressure sensor offset = Pressure offset in millibars applied to the atmospheric pressure measured by the radiosonde A/D System = Data acquisition system used (e.g. TMAX, V2C, V7) Radiosonde Total Col. Water = The total column water calculated from radiosonde Instrument Type = States what kind of instrument was on the balloon (e.g. Ozonesonde, Water Vapor, Ozonesone and Water Vapor) Original File Source = States the original source the fleout file was produced from (e.g. raw, fle2, fle) Ozone sonde number = The serial number of the ozonesone. An x,y,z,r,a following the serial number denotes a reconditioned ozonesonde Solution = Type of sensing solution used (e.g. 1% full buffer, 2% no buffer, 1% 1/10th buffer) Oltmans solution correction = A correction applied to specific solution types Total ozone column (CMR) = The total column ozone calculated for the sounding using the Constant Mixing Ratio extrapolation method Total ozone column (SBUV) = The total column ozone calculated for the sounding using the climatology based on the SBUV instrument for extrapolation Total ozone stop pressure = The pressure at which total column ozone is extrapolated from Time (sec) to pump 100 ml = The pump flow rate as measured using the bubble flow meter method in seconds per 100 milliliters Dry flowrate correction = The relative humidity flowrate correction in % Background current (uA) = The background current in µA Coefficients = The name given to the set of pump coefficients used. Pump coefficients = The pump efficiency used in calculating ozone represented by 4 coefficients representing a cubic polynomial (e.g. pc0 = 4.0564 pc1 = -7.0851 pc2 = 5.1822 pc3 = -1.1581) or a pressure table Pressure data source = The source of the pressure data is either the radiosonde measured pressure or the GPS calculated pressure Altitude data source = The source of the altitude data is either geopotential altitude as calculated by the pressure, temperature, and relative humidity or the GPS altitude Column Label Descriptions Time = The elapsed time from launch in minutes Time Sec = The elapsed time from launch in seconds Time GMT = Time in GMT Press = The corrected pressure as measured by the radiosonde with the pressure offset applied Praw = The raw pressure measured by the radiosonde. Alt = The altitude in kilometers above sea level either calculated by the geopotential altitude or reported by the GPS Tcorr = The corrected air temperature as measured by the radiosonde with ascent data interpolated onto the descent altitude grid to correct for noise in descent temperature data Temp = The corrected air temperature as measured by the radiosonde Traw = The raw air temperature measured by the radiosonde Theta = The calculated potential temperature RH = The corrected relative humidity as measured by the radiosonde RHraw = The raw relative humidity measured by the radiosonde TFp V = The temperature of the frost point as measured by the radiosonde RS H2O Mr = The radiosonde water vapor mixing ratio in parts per million by volume IPW V = The integrated precipitable water as measured by the radiosonde TVaisI = The internal radiosonde temperature RSBat = The battery voltage of the radiosonde RS P Temp = Internal temperature of the radiosonde pressure sensor. RS U Temp = Internal temperature of the radiosonde moisture sensor. Rise Rate = The rise rate of the ozonesonde balloon. O3 Cell I = The cell current in µA measured by the ozonesonde O3 P = The partial pressure of ozone in millipascals O3 Mr = The mixing ratio of ozone in parts per million by volume T Pump = The temperature of the pump in degrees Celsius O3Bat = The ozonesonde battery voltage. I Pump = The ozonesonde pump current in miliamps. Total Column O3 = The total column ozone without the extrapolated amount added Total w/ Extrap O3 = The total column ozone with the extrapolated amount added Total w/ SBUV O3 = The total column ozone calculated for the sounding using the climatology based on the SBUV instrument for extrapolation GPS lat = The latitude as reported by the satellite GPS receiver GPS lon = The longitude as reported by the satellite GPS receiver GPS alt = The altitude as reported by the satellite GPS receiver GPS sats = The number of GPS satellites locked on to the radiosonde GPS Time = The time of day reported by the satellite GPS receiver GPS Press = The air pressure calculated by the GPS satellite GPS Heading = The heading reported by the GPS receiver GPS Elev Angle = The elevation angle of the satellite GPS receiver Wind Speed = The calculated wind speed in meters per second Wind Dir = The direction of the wind in degrees (0º-360 º) *Data that does not pass quality control will be represented as 99999.