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Summary: Besides being used in obvious applications such as driving, hiking, boating, and flying; GPS receivers have also been used in farming, construction, movie making, and laptop computers. 24 GPS satellites orbiting the earth every 12 hours, guarantees that every point on the planet earth will be covered by at least 4 satellites at all times. The first satellite was launched
Image Dimensions: 115 x 86
Image originally found here.