“The University of Texas Hacked Starlink’s Signal So It Can Be Used as a GPS Alternative” How? What do they mean by this?
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A GPS satellite is a radio beacon which sends out a simple signal at fixed intervals. The receiver knows the position of each satellite and when it is supposed to send out these beacon signals. So by measuring the difference in time from when the satellite sent out the signal to it was received by the receiver it is possible to calculate how far away from the satellite it is using the speed of light. By getting signals from multiple satellites you can calculate your exact position.
But the Starlink satellites also transmits signals at regular intervals. By finding out the position of the Starlink satellites and when exactly it starts transmitting it is possible to use these signals the same way in order to find your position.
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