Project: Japan/East Sea (JES) experiment in the winter 2000 Platform: NPS/CIRPAS Twin Otter aircraft Type: Meteorological and turbulence Data Version: January, 2002 Format: MathWorks MATLAB binary Institution: University of California, Irvine Dept. Mech. & Aerospace Eng. Irvine, CA 92697-3975 USA Please direct inquiries and comments about this data set to: Djamal Khelif dkhelif@uci.edu 949 824-7437 Carl Friehe cfriehe@uci.edu 949 824-6159 DATA FILES DESCRIPTION Each flight is identified by the UTC date on which it started as in YYMMDD where YY, MM, and DD are the year, month and day respectively. Two types of data files are provided for each flight: low-rate (1-Hz) data for the whole duration of the flight and high-rate (10-Hz) data from level and straight runs. Names of 1-Hz data file have this form: YYMMDD_1Hz.cdf. Names of 10-Hz data files have this form: YYMMDD_10Hz_runxx where "xx" is the run number (runs are numbered chronologically). For example, data files for the flight that originated on February 11, 2000 are: 000211_1Hz.cdf 000211_10Hz_run01.cdf 000211_10Hz_run02.cdf 000211_10Hz_run03.cdf 000211_10Hz_run04.cdf 000211_10Hz_run05.cdf 000211_10Hz_run06.cdf 000211_10Hz_run07.cdf 000211_10Hz_run08.cdf 000211_10Hz_run09.cdf 000211_10Hz_run10.cdf 000211_10Hz_run11.cdf 000211_10Hz_run12.cdf 000211_10Hz_run13.cdf 000211_10Hz_run14.cdf 000211_10Hz_run15.cdf ***Important Exception: Data from the flight originating on February 20, 2000 (000220* files) are not from CIRPAS data system but from a redundant system (UCI's). The sampling rate for the high-rate data is 40 Hz instead of 10 Hz. The variables in the 1-Hz files are: Variable Description Units month month day day hour hour UTC minute minute second second hr Radar Altitude m lat Latitude deg N lon Longitude deg E wx East Wind m/s wy North Wind m/s wz Vertical Wind m/s ah Absolute Humidity g/m3 ta Ambient Temperature deg C td Dewpoint Temperature deg C ts IR Sea Surf Temperature deg C ps Static Pressure hPa The variables in the 10-Hz (or 40-Hz for flight 000220) files are: Variable Description Units month month day day hour hour UTC minute minute second second hr Radar Altitude m lat Latitude deg N lon Longitude deg E wx East Wind m/s wy North Wind m/s wz Vertical Wind m/s ah Absolute Humidity g/m3 ta Ambient Temperature deg C td Dewpoint Temperature deg C ts IR Sea Surf Temperature deg C ps Static Pressure hPa f Frequency Hz O_wz_ah Lat Heat Ogive W/m2 O_wz_theta Sensible Heat Ogive W/m2 O_wz_war Along-wind Moment Ogive Pa O_wz_wcr Cross-wind Moment Ogive Pa The 1Hz files can be read with read_1Hz.c. The 10Hz files can be read with read_10Hz.c. The 40Hz files can be read with read_40Hz.c. All C programs can be found on the Tools page.