Best Handheld GPS Receivers
Whether you’re hiking, geocaching, fishing, snowmobiling, or hunting, we are here to guide you through some of the best handheld GPS today.
GPS
How GPS Receivers Work – Trilateration vs Triangulation
Have you ever wondered how your GPS receiver works? They use a technique called trilateration, which measures distances, not angles as in triangulation.
GPS Accuracy: HDOP, PDOP, GDOP, Multipath & the Atmosphere
Have you ever wondered about your GPS accuracy? A well-designed GPS receiver can achieve a horizontal accuracy of 3 meters or better. But factors affect it.
Selective Availability in Global Positioning System (GPS)
Selective availability is the intentional degradation of GPS signals. When selective availability was enabled, this added error horizontally and vertically to GPS signals.