How many calls does a GPS satellite receive per second?

Answer by Robert Frost:

GPS satellites don't receive calls.
GPS satellites do not receive information from GPS receivers.  It is a one-way exchange. Each GPS satellite continually emits a radio signal that contains information that identifies the current time and the location of the GPS satellite.  Every GPS receiver in the path of that signal receives the signal.  The signal is not intended for a specific receiver.
The GPS receiver (whether in a phone, car, boat, or airplane) collects such signals from multiple satellites, and then does all of the math needed to calculate the position of itself.
The receiver doesn't have to send any signal to the satellite. 
For a little more explanation, see Robert Frost's answer to How do GPS systems work?

How many calls does a GPS satellite receive per second?

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