EPIC: Aircraft C-130 Aerosol UNAM Aerosol Measurement System 
(Baumgardner)

1.0 Contact:

     Darrel Baumgardner
     Centro de Ciencias de la Atmosfera
     Universidad Nacional Autonoma de Mexico
     Circuito Exterior
     Ciudad Universitaria
     04510 Mexico D.F.
     MEXICO
     (52) 555-622-4053
     (52) 555-622-4248 (fax)
     darrel@servidor.unam.mx

2.0 Dataset Description:

     This dataset consists of UNAM aerosol measurement system data
     taken aboard the NCAR C-130 during the EPIC field project.  The
     data includes C-130 flights 5-17, which occur between September
     13 and October 6, 2002.

2.1 Data Format:

     The data are in columns with the names ordered as below:

     ihr imn isc tsecs HGME232 GLAT GLON ccn02 ccn04 ccn06 ccn08 ccn10 coeffabs coeffsct

     The UTC time is given in both hours, minutes and seconds (ihr 
     imn isc) and seconds since midnight (tsecs). The time reported 
     is that which the UNAM data system recorded from the aircraft 
     system, so the data are synchronized. A number of aircraft 
     variables are also listing with the UNAM data, i.e. aircraft 
     altitude and horizontal position given by the radar altimeter, 
     HGME232, and GPS latitude and longitude, GLAT and GLON, 
     respectively.

     The CCN concentrations, in cm-3 at supersaturations of .2%, 
     .4%, .6%, .8% and 1% are given in the columns marked by ccn02 - 
     ccn10.

     The absorption and scattering coefficients, in units of m-1 are 
     given by coeffabs and coeffct, respectively.

3.0 Quality Control:
  
     No additional quality control was performed on this dataset by
     UCAR/JOSS.

4.0 Remarks

     For additional information regarding the interpolation applied
     to the CNN data, please contact Darrel Baumgardner.