true none time (sec) double /sim/time/elapsed-sec latitude double /position/latitude-deg longitude double /position/longitude-deg positive altitiude (m) float /position/altitude-ft 0.3048 Velocity North ("vn" mps) float /velocities/speed-north-fps 0.3048 Velocity East ("ve" mps) float /velocities/speed-east-fps 0.3048 Velocity Down ("vd" mps) float /velocities/speed-down-fps 0.3048