I was asked some good questions on another board:
“I have to ask if the 10Hz sampling rate is the max and what is GPS antenna accuracy and is there “drift” adjustment for the antenna? This is of this new and eciting product but those are two things that I’ve found that really affect how accurate and useable the data ends up being when trying to analyze how to find lost time out on the track.”
The response:
Great questions. Drift adjustment is not required since this is not using accelerometers.
10Hz sampling rate is constant, not a peak.
They use doppler shift carrier frequency data to get far more accuracy than what a nav system can do just with standard GPS location info which is normally only good to 3 meters for position and 6 meters for elevation.
Distance is accurate to a tenth of a percent or less, so it can measure a whole quarter mile pass within 1.32 feet or better.
Speed is within 1 tenth of a MPH from 1/3 of a MPH to WAY faster than a car can go. These boxes are often used for salt flats passes etc.