A viewgraph presentation describing an analytical thermal model used to enable research on autonomous soaring for a small UAV aircraft is given . The topics include : 1 ) Purpose ; 2 ) Approach ; 3 ) SURFRAD Data ; 4 ) Convective Layer Thickness ; 5 ) Surface Heat Budget ; 6 ) Surface Virtual Potential Temperature Flux ; 7 ) Convective Scaling Velocity ; 8) Other Calculations ; 9 ) Yearly trends ; 10 ) Scale Factors ; 11 ) Scale Factor Test Matrix ; 12 ) Statistical Model ; 13 ) Updraft Strength Calculation ; 14 ) Updraft Diameter ; 15 ) Updraft Shape ; 16 ) Smoothed Updraft Shape ; 17 ) Updraft Spacing ; 18 ) Environment Sink ; 19 ) Updraft Lifespan ; 20 ) Autonomous Soaring Research ; 21 ) Planned Flight Test ; and 22 ) Mixing Ratio .