This is an output file that can be used to get a data file that is almost in Google Earth "KML" file format. To run JSBSim in standalone mode and using this file, type (for example): src/jsbsim --script=scripts/c1723.xml --logdirectivefile=kml_output The first column of data must be removed (it is the elapsed simulation time in seconds). Removing the first column of data can be done as follows: cut -d, -f2- GroundTrack.kml.csv > GroundTrack2.kml The first row containing the column headers should be removed, too, for use in Google Earth (edit GroundTrack2.kml in the above example). Then, you can concatenate the Pre- and Post-fix files to make a complete KML file you can drop into Google Earth: cat Prefix.kml GroundTrack2.kml Postfix.kml > FinalGroundTrack.kml position/long-gc-deg position/lat-gc-deg position/h-sl-meters