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[aprssig] "location changes too fast > 500 km/h"

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Mon Oct 12 19:36:40 UTC 2009


AH!  I think I begin to see!  Was that you "flying" houses and red dots 
over the Atlantic?  In particular:

g1 - A Home icon flying west and south-west.
ccc - A Red Dot flying north-east
cj - A Home icon flying north-east

These three were all moving right around 1,000mph and stopped abruptly 
just after 10:00 UCT this morning.

Lynn (D) - KJ4ERJ

Heikki Hannikainen wrote:
> On Sat, 29 Aug 2009, Keith VE7GDH wrote:
>
>> Kriss KA1GJU wrote...
>>
>>> The KA1GJU-6 tracker will not show up properly on APRS.fi since my 
>>> speeds are in excess of 500 kM/hr (270 kts) above 10,000 feet.
>>
>> Perhaps Hessu could tweak the settings on aprs.fi to remove the
>> 500 kM/h limitation for stations using a plane/small plane symbol.
>
> I've tweaked the algorithm now, and upped the hard limit considerably. 
> aprs.fi should now work fine for civil aviation purposes, but there 
> might still be issues with those of you with a scramjet or an 
> SR-71/A-12. The solution isn't symbol specific.
>
> http://oh7lzb.blogspot.com/2009/10/new-bad-gps-fix-detector-algorithm.html 
>
>
> http://aprs.fi/?call=KA1GJU-6
>
>   - Hessu
>
>
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