To demonstrate or experiment with Vis5D we provide two sample datasets. To visualize the Schlensinger thunderstorm file enter the command vis5d SCHL.v5d To view an isosurface of QL (moisture content): Click on the QL button in the left column of the button matrix. On the slider, select a value near 1.0, then click on the OK button. Turn on animation with the ANIMATE button. To view a vertical contour line slice of QL: Turn off animation by clicking on ANIMATE again. Click on the QL button in the third column. Move the slice by first selecting the SLICE radio button. Then use the right mouse button to drag any corner of the slice along the edges of the 3-D box. To visualize a LAMPS (Limited Area Meso-Scale Prediction System) model simulation of an extratropical cyclone, enter the command: vis5d LAMPS.v5d To view an isosurface of wind speed over a topography with map lines: Click on the TOPO and MAP buttons. Click on the SPD button in the first column. Then select a value near 45.0 on the slider and click on OK. Turn on ANIMATE and you will see an animation of the 45 m/s wind isosurface. To make some interactive wind trajectories: Turn off the wind speed isosurface by clicking on the SPD button again Select the TRAJECTORY button. Move the mouse pointer into the 3-D window and press the middle mouse button. You will get a series of white wind trajectory lines passing through the 3-D cursor location. Move the 3-D cursor by dragging it with the right mouse button then click the middle button to make more trajectories. Select RIBBON and then the SET 2 button and try making some yellow ribbon trajectories. The Schlesinger and LAMPS data sets are also available as the 3D McIDAS grid files named GR3D0001 and GR3D0002. They are available on the Vis5D ftp site . See chapter 2 for more information. To list the grids in GR3D0001 and to see statistics about them, enter the commands: igg3d list 1 190 -gr3df 1 igg3d info 1 190 -gr3df 1 The SCHL.v5d file was made from the GR3D0001 file with the command: gr3d_to_v5d 1 1 SCHL.v5d To list the grids in GR3D0002 and to see statistics about them, enter the commands: igg3d list 1 189 -gr3df 2 igg3d info 1 189 -gr3df 2 The LAMPS.v5d file was made from the GR3D0002 file with the command: gr3d_to_v5d 2 1 LAMPS.v5d A variety of other sample datasets are available on the ftp site or upon request.