Shortly after the Dragy GPS receiver was released I purchased a unit for use in testing. One of the concerns I had with the product was the 10Hz GPS receiver and the claims of accuracy to 1/100th of a second.
With a sampling rate of once every tenth of a second it didn’t add up that accuracy was to 1/100th of a second. The question was posed to a Dragy representative and they clarified that the report Dragy outputs that shows times to 1/100th of a second is based on an algorithm that interpolates the value.
Since being introduced the measurement performance of the device has been advertised as both 1/10th of a second, on the Dragy page on Amazon.com
and on the Dragy Performance website the claim is that it measures performance to 1/100th of a second.
So why the difference? The device clearly does not “measure” performance within 1/100th of a second. That’s not possible since the GPS receiver updates the vehicle position every 1/10th of a second. Dragy had explained that it doesn’t measure to 1/100th but that it reports based on an algorithm to 1/100th of a second.
I don’t know why the Dragy website advertises a measurement of 1/100th of a second, but by doing so it is likely going to cause disagreements among people interested in the device performance.