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Chapter 65 What to Do?
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Chapter 67 You’re My Brother
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... orbit and the remaining three satellites are for backup. Due to the continuous transmission of electromagnetic signals from the satellites to earth, the current position of a person can be determined by a theodolite. Signals from any three satellites in the satellite constellation are received by GPS receivers. After the GPS receivers receive the information and trilateration, the receivers will accurately be able to display a user's position, electronically, according to the electronic map tha ...
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