If you leave the track, or cut out a part of the circuit, then again you will get a very poor position based comparison or you may even be unable to play the video or move the graph cursor beyond the point where you left the circuit if a poor datum is used. If you lose GPS position or you have heavy tree cover, then it is best to switch back to distance or even Time. MathType 7.5.0.125 MathType is a powerful interactive equation editor for Windows and Macintosh that lets you create mathematical notation for word processing, web pages, desktop publishing, presentations, and for TeX, LaTeX, and MathML documents. Note: Graphing using this method relies on good GPS position data. When using Position, the Delta-T and Predictive lap time are accurate to within 0.02 seconds around the full length of the Nordschleife! REVIEWS BY LORI GRUNIN A s a charting complement to a spreadsheet package, DeltaGraph Pro 3.5, 195 from DeltaPoint, has a lot to. Using GPS position alignment also makes the Delta-T value very accurate. This makes the values meaningful, even around the Nordschleife, where a Delta-T or predictive lap time based on distance would only be accurate to around 1 – 2 seconds after a full lap. MRT delta of each window orientation at different TODs across DOYs. In the first plot, they have both travelled exactly 21060 m from the Start/Finish line, but they are 240 m apart! In the second plot, the GPS position of each vehicle is used to align the traces, and here you can see how closely they now line up. Red Rock Software on Tuesday announced DeltaGraph 5.6, an update to its charting, graphing and data analysis software for Mac OS X and Windows. The first plot uses the rolling distance to compare the two drivers, and the second uses GPS position. You can see a comparison of this effect below, from two different professional drivers at the Nordschleife during a race. The position remains more accurate, as the error in GPS is much lower than the variation in rolling distance (which is often > 30m). Traditionally, rolling distance has been used to align laps, but with the advantage of GPS it is better to use GPS position, as the distance travelled around a lap varies from lap to lap depending on the driving line. Time and distance are only used in special circumstances. Position is the default X-axis and this is the method recommended for comparing two different laps. These are selectable via the Graph Ribbon menu. There are three ways of aligning comparison data: Time, Distance and Position.
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