If the vehicle being used does not have a metal roof, then place the GPS antenna on a flat piece of metal at least 10 cm
in diameter. If this is not possible, copper or aluminium foil can be used to create a shaped ground plane underneath the
antenna. For example, on a fibreglass roof, mount the antenna on top of the roof, and place some adhesive backed
metal foil underneath, on the inside of the roof.
Acquiring Satellite Lock
Tall buildings or trees can block GPS signals, causing a reduction in the number and quality of satellites being tracked,
leading to inaccurate position measurements and a noisy velocity signal.
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