signals are carried through waves at a frequency that does not move easily
through solid objects. A GPS device relies on a series of satellites in order
to determine where it is physically located. The signals sent from these
satellites do not penetrate all kinds of barriers with ease. When you use a GPS
inside a building, a wide variety of physical barriers and potential
interference sources make it difficult for the device to pinpoint your location
GPS works better when the device has a clear line of sight to the sky. The more
GPS satellites that your personal device can access, the more accurate it is.
When inside, there is often no direct line from the satellite signals to your
device. The signal weakens or distorts as it travels through the building to
your GPS, and the result is inaccurate operation.
construction materials in a building affect how well a consumer GPS device will
work inside. If you're in a house and stand near enough to the windows, or if
you're in an office tower with large windows, your GPS could still work. GPS
signals pass through glass much more easily than they do through thick, solid
materials such as brick, metal, stone or wood.
device may not work inside the building, because of signal absence with GPS
satellites. It’s always recommended to take it out or put in to the car for