How Accurate is the Navig8 GPS and what can affect a GPS signal?
Navig8 GPS receivers are accurate to within 15 meters, although they can be affected by atmospheric factors and other sources of error: Signal Path The GPS signal is reflected off of objects such as buildings, this increases the time taken for the signal to travel to the GPS receiver, thereby causing errors on the GPS receiver Ionosphere and troposphere delays The GPS signal from the satellites slows down as it passes through the Ionosphere and Troposphere. To counter this, the GPS receiver has software built-in that allows it to correct, to a degree, the error caused by atmospheric delays. Satellite Positions The more spread out over the horizon the satellites are, the better the accuracy of the signal being measured by the GPS receiver. The accuracy can be affected by satellites being in a straight line or bunched together Ephemeris errors This is the difference between the satellites actual position and its expected position Number of satellites The more satellites that a GPS receiv
