Telenav Scout v1.0 for Windows for T-Mobile - Manual (Page 71)

How accurate is the GPS?
GPS accuracy can range from 20m (approx. 65 ft) to 100m (approx. 328 ft). Most of the time, the GPS is accurate to less
than 50 meters (approx. 164 ft).
What are ideal conditions for GPS navigation?
Ideally, a device with a GPS receiver needs a clear view of the sky, starting from about five to ten degrees above the
horizon. Solid or massive obstructions can reduce accuracy or block GPS signals, and may cause extended initialization
time (time to first GPS fix). Common obstructions include tall buildings, covered parking lots, tunnels, trees, and terrain
features.
If you are parked in a covered parking lot or near a tall building, it is recommended that you move to an open area and
then begin to use Scout.
Why does GPS not work near buildings and other tall objects?
Your device requires signals from GPS satellites in order to work, so it needs a clear view of the sky. Dense materials
(such as concrete, rock, steel, heavy wood), tall buildings, terrain features (like mountains, ridges, and cliffs), and large
trees can block or degrade GPS signals and may make it impossible to determine your location.
GPS satellites are not always immediately overhead and could be anywhere in the skies at any time, even low on the
horizon; however, there are enough satellites in orbit so that four or more will be in view of your device if not blocked by
large objects, terrain, or dense materials.
© 2012 TELENAV, INC. PAGE 71 OF 74