Is there a simple way to extract edited, averaged data from the db system?
Yes! You can use the xt2 command to get a basic averaged file. The xt2 command is described at: http://www.esrl.noaa.gov/gmd/aero/software/aerosols/xt2.html. A couple examples here: Hourly averaged data for THD for the month of January 2009 with a header: xt2 –header –h thd 2009 1 2009 32 Daily averaged data for BRW for 2008 without a header: xt2 –d brw 2008 2009 xt2 generates a file with the name al_*X.stn where * represents the averaging stype and stn is the three letter station id so for the two examples above the file names would be al_HX.thd and al_DX.brw.