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Tip of the Day 10/19: Trees, Buildings Can Confuse GPS Receivers | The Joy of Geocaching Book Contribute Your Stories!

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Tip of the Day 10/19:Trees,Buildings Can Confuse GPS Receivers

Yes,trees,and anything else that interferes with a line of sight. When satellites on the horizon are obscured by buildings or dense overgrowth,signals may be lost entirely. This is especially true in cities. You can be standing in an open square and get no better than 50-foot accuracy because of surrounding buildings. Some of our most frustrating searches have happened in New York City,where tall buildings have reduced our GPSs accuracy to 80 feet or more.

Out in the woods,rock walls can cause “signal bounce,” which makes coordinates jump around crazily. The only solution to this problem is to move to an area with a reliable signal,point yourself in the direction of your destination and count off steps until you’re in the right vicinity.

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