[aprssig] Marathon Pace Generator

Patrick Wood winston at winston1.net
Tue Mar 19 15:15:20 CDT 2013


That actually does sound useful for a number of events I run (pun not
really intended but enjoyed)...  How do you provide the route to the stamp?


p


On Tue, Mar 19, 2013 at 2:47 PM, Robert Bruninga <bruninga at usna.edu> wrote:

> Back in the 90’s, APRSdr was a version of APRSdos that would dead-reckon
> any number of runners along a Marathon route that was drawn on the map in
> purple.  Any object placed on the map on the purple line would begin to
> move at the indicated pace along the route and these objects would be
> updated and transmitted once a minute for the duration of the event.
>
>
>
> I just programmed such a DR engine into a basic stamp.  Just two wires to
> a TNC and it will generate a LEAD runner and a FEMALE lead on the map,
> moving along at Marathon pace.  No muss, no fuss.
>
>
>
> The value of this was 20 years ago at the start of APRS was for tracking
> the lead male and female runners without having to outfit them with GPS.
> It was usually just as accurate as GPS back when GPS would not guarantee
> any better accuracy than 100 meters.   But even now, with most trackers
> only updating at 1 minute report rates (+/- 30 seconds of error or about
> 420 feet), the DR object is just as good .  Im adding buttons on the box to
> slightly increase or decrase the rates if reports from checkpoints appear
> to be ahead or behind the pace.
>
>
>
> During the Marathon this weekend, the organizers did not want a lead
> bicycle, so looking at the map gave no clue where the LEAD was (only the
> TAIL)..
>
>
>
> So as not to confuse everyone, Im going to use the object names of PACE
> for the lead runner and PACE-F for the lead female.  Then possibly one more
> for PACK which will have the typical average pace for typical marathons.
>
>
>
> The set up for our marathon needed only 23 points to define the route.
>
>
>
> Donno if anyone else would use this or not.  It can be just a dongle with
> a DB9 connector for plugging into any TNC or Tracker.
>
>
>
> Bob, WB4APR
>
>
>
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