GP3S -Basic Rules 2008

[faster]

Jester;455376 wrote:

Tidiga versioner av GPSResults “komer inte ihåg” inställningen vad gäller doppler-valet. Så se till att installera senaste versionen, där den biten är avlöst.

Nu har jag installerat den senaste versionen V5.42 det var anledningen till dopplervalet.

[glader]

Vad betyder dessa två?

– Linear Speed. (Linear speed means that you calculate the speed over the exact positions a rider has sailed)
– No interpolation of distance speeds

[jester]

Linear speed innebär väl att man mäter sträckan över den sträcka som man verkligen har kört. Istället för kortaste vägen mellan en start-punkt och en slutpunkt.
GPSResults kallar detta för Projection:

Projection
controls projection of the travelled distance to a straight line instead of using the really travelled
(accumulated) distance for speed computations (with and without linear interpolation).
Projection results in slightly slower speeds because the travelled distance is in general longer
than the projected distance.

Interpolation: Hämtade detta från manualen av GPSResults:

Interpolation
With this checkbox the selected track- or time-lengths will be interpolated exactly from the GPSdata,
leading to more accurate and often slightly improved results.
When Interpolation is switched off the track- or time-segments will be added conventionally
until the selected value is reached. For example with the 500m selection the average over at
least 500m will be used (the really travelled distance is displayed as second number in the
Results list).
When Interpolation is switched on, the average speed over the exact track- or time-lengths is
computed by linear interpolation of the first or last trackpoints, depending on which piece was
the slower one. Thus, only as much as necessary of the slower interval is used. In most cases
this leads to slightly better average speeds. Only in cases where e.g. the first and the last
sections were faster then the middle sections, the conventional method gives better, but more
inaccurate averaged results, since then the average of the longer distance is better than the
average of the really wanted distance.

Lekte lite med denna inställnig häromdan på min senaste session.
Utan interpolation: 30.468
Med interpolation: 30.471

Ingen större skillnad mao. Men eftersom reglerna säger at den inte skall vara på, så tar vi bort det krysset.