(*) Export *.csv file from http://aprs.fi using "Data Export" tool on RHS of the aprs.fi screen.

(*) Enter Callsign (for har100724_gpsl, CALLSIGN = KE7ROS-10)

(*) Set START and END dates.  End at time of export, start at least 6 hours prior to launch.

(*) Select format:  CSV/EXCEL

(*) Click "Export"

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(*) Open CSV file in speadsheet.

(*) Delete column called "lasttime"

(*) Delete column called "comment"

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I did the following in a text editor:

(*) In column "Time" delete the date specification; search on the date and replaced with "" (none)

(*) In column "Time" replace all ":" with ","

(*) Replace column header "time" with three new column headers: 
    "h,min,sec"

(*) Add units to speed and altitude columns:  "mph" and "meters"