Appropriate and Inappropriate Signal Reception Location
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A good location for signal reception is outdoors where the sky is visible and
not blocked by buildings, trees, or other objects.
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You may experience GPS signal reception problems in the areas described
below.
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Where the view of the sky above is narrow
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Near trees or buildings
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Near a train station, airport, or other congested area, or where there is a
large amount of vehicular traffic
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Near railway aerial wires, high-voltage lines, TV towers, etc.
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GPS signal reception is not possible in the areas described below.
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Where the sky is not visible
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Underground, in a tunnel, underwater
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Indoors (Reception may be possible near a window.)
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Near wireless communication equipment or other devices that generate
electromagnetism.
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GPS satellites are in constant motion, so your location, the time of day, or
other factors may cause a delay in the positioning operation or may even
make positioning impossible.
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