Groups | Search | Server Info | Login | Register

Groups > comp.os.linux.misc > #79072

Re: GPS Based Speedometers

Cross-posted to 2 groups.

Show all headers | View raw

On 10/12/2025 12:14 am, knuttle wrote:

<Snip>

> GPS accuracy is 10 to 16 feet.   So the slower the vehicle is going the 
> more imprecise that speed, as it is dependent on the accuracy of the 
> starting position and the ending position. The time interval is also a 
> factor in the accuracy of the speed by GPS. ie at 60MPH, the car travels 
> 520 feet per minute, so 10 feet on the starting and ending positions has 
> more affect than if the speed was at 30MPH or 1040 feet.  These number 
> could be higher depending on the interference in the area of the 
> position.  It is best to put the numbers in a spreadsheet to understand 
> the effect.
> 
> The speed detecting radar is accurate to 1 to 2 miles per hour in ideal 
> conditions.  In practice I suspect that if you stay within 10% of the 
> speed, it is questionable if the radar detector can definitely say you 
> are over the speed limit. (10% Based on actual experience with many 
> electronic instruments)  Again there are many variables that affect the 
> measurement of the speed detecting device.

And your GPS Speed is only indicating what you were doing, what, 0.5 
Secs ago .... cause the signal has to go up to the Satellite and come 
back down, doesn't it??
-- 
Daniel70

Back to comp.os.linux.misc | Previous | Next — Next in thread | Find similar

Thread

Re: GPS Based Speedometers Daniel70 <daniel47@nomail.afraid.org> - 2025-12-14 23:06 +1100
  Re: GPS Based Speedometers "Carlos E.R." <robin_listas@es.invalid> - 2025-12-14 13:43 +0100
  Re: GPS Based Speedometers rbowman <bowman@montana.com> - 2025-12-14 19:09 +0000
  Re: GPS Based Speedometers c186282 <c186282@nnada.net> - 2025-12-15 00:12 -0500
    Re: GPS Based Speedometers rbowman <bowman@montana.com> - 2025-12-15 19:55 +0000

csiph-web