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Propagation TimePropagation time is the period that is required for a signal to travel between points on a transmission path. By determining the propagation time and knowing the radio signal propagation speed, the distance from the GPS satellite can be calculated with confidence due to the extremely accurate time clocks. Determining the initial distance from the satellite is called pseudo-ranging.
GPS Propagation Time Measurement
This figure shows how propagation time from a satellite is calculated in a GPS system. This diagram shows that a GPS satellite sends a unique coded message at a specific time. The GPS receiver continuously looks for the unique satellite code and when it matches, it notes the time difference between when the message was sent compared to its internal clock of the GPS receiver. This difference of time is the propagation time.
GPS Quick Course, 2nd Edition Books
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GPS Quick Course Book
This book covers satellite position location technology and the GPS system has evolved. You will learn the functional parts of GPS systems, how they work and work together to provide position measurements that are accurate to within centimeters. $19.99 Printed, $16.99 eBook |
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UMTS, 3G, 3GP, and Long Term Evolution (LTE) technology
UMTS, 3G, 3GP, and Long Term Evolution (LTE) technology
