XPost: comp.os.linux.misc   
   From: robin_listas@es.invalid   
      
   On 2025-12-14 13:06, Daniel70 wrote:   
   > On 10/12/2025 12:14 am, knuttle wrote:   
   >   
   >    
   >   
   >> 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??   
      
   No, it does not go up. Just down. The GPS devices are receive only.   
      
   --   
   Cheers, Carlos.   
   ES🇪🇸, EU🇪🇺;   
      
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