Racelogic VBOX II Guia do Utilizador descarregar pdf (Página 60)

Racelogic Ltd PerformanceTools Software

02/05/2014 Page 60

If you want to load a .cir file into PerformanceBox Tools on its own, click Load All and then

type *.* in the File name field:

You can then select the .cir file and it will load like a normal .dbn file.

A library of circuit overlay files is available from the PerformanceBox website. If you would

like to share circuit files you have created please contact us and they will be added to those

already available.

Aligning Circuit Overlays and Laps

The standard positional accuracy of PerformanceBox is 5m 95% CEP for Longitude and

Latitude. CEP = circle error probable.

95% CEP means 95% of the time the position readings will be within a 5m diameter circle of

the true position. This error is due to the changing state of the ionosphere, constantly

changing the time taken for the satellite signals to reach the earth. This means that overlaid

laps may appear to miss the edges of the track, especially if the laps or overlay were logged

several hours apart.

The Align Circuit Tracks feature allows post-processing analysis to counter some of this

positional error, by rearranging the driving lines or circuit overlay in the Graph:Map window.

This can be especially useful if the circuit overlay file has been created in Google Earth,

which is not always 100% positionally accurate (a good example of this, at the time of going

to press, is the Paul Ricard circuit in the south of France – the Google Earth image is

approximately 200m adrift of its true position.) It can also help to combat the effects of

positional shift that have occurred between sessions at a circuit, such as morning/afternoon

or one day to another.

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Racelogic VBOX II Guia do Utilizador Página 60