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Summary: own Pseudo Random Code (PRC). Kind of like it's own language . . . a very complicated digital language. This PRC is used to determine how far a GPS receiver is from a specific satellite. 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.
Image Dimensions: 115 x 86
Image originally found here.