Spooky

Closest yet. Look at the times. One device detects motion relative to satellites in space whiring hundreds of miles above at thousands of miles per hour. The other counts ticks of the wheel. There were numerous stop-starts during this ride, yet after nearly three hours, GPS and wired computer are within 0.5 seconds of total moving time. Now only if they could measure distance as closely. GPS fell about 0.8 miles behind.