BASEline Chart Information
BASEline is a tool designed to analyze wingsuit flight data. In addition to the map, BASEline shows three charts to give information about a wingsuit skydive or BASE jump.
The time chart displays track data with time on the horizontal axis. Altitude, speed, and glide ratio are shown on the vertical axes. Speed is shown as seperate horizontal and vertical speed components.
By clicking and dragging across the time chart you can trim the track. Trimming the track helps with removing unimportant data before and after a jump. Trimming also sets the exit point, so that calculations of time and distance are relative to the true start of the jump.
Zoom in or out on the time chart by scrolling on the bottom time axis.
The flight profile displays change in altitude and distance relative to your selected start point. The vertical axis is the change in altitude relative to the start point. The horizontal axis is the distance from a given point to the start point.
This chart is most useful for measuring start performance in the BASE environment. As soon as you make a turn, the flight profile will no longer mean much because you are no longer flying straight away from your start point.
Drag the zoom slider to zoom in or out.
The polar chart displays horizontal versus vertical velocity. Diagonal lines show glide ratios of 1:1, 2:1, and 3:1.
Learn you some theory from Matt Gerdes and Top Gun BASE about polar charts.
The polar chart is the best tool for understanding your speed during a flight. With a quick glance you can see your horizontal speed, vertical speed, total speed, and glide ratio.
You can see a jump build up speed at the start, and how it translates into horizontal speed. It is also useful for seeing how to build up speed, and convert that into a flare.
The green ellipse represents typical skydiving and BASE canopy flight envelopes. The purple ellipse represents typical wingsuit flight performance envelope. The purpose of the ellipses is to give a point of reference on the polar chart, so that it can be quickly understood, without having to directly read the speed numbers.
The baseline ellipses are derived from over 2000 wingsuit jumps: