Fun fact, most people think GPS sats send out "position" data, when in fact they are flying at 20,000mph or whatever and have no idea where they are, they send out atomic time and the receiver calculates the actual time that "makes sense" based on the delays of four sats as the signal passes through the atmosphere. Four equations with four unknowns and differential eq math gets you a 3d position.
Fun fact, most people think GPS sats send out "position" data, when in fact they are flying at 20,000mph or whatever and have no idea where they are, they send out atomic time and the receiver calculates the actual time that "makes sense" based on the delays of four sats as the signal passes through the atmosphere. Four equations with four unknowns and differential eq math gets you a 3d position.
Fun fact, most people think GPS sats send out "position" data, when in fact they are flying at 20,000mph or whatever and have no idea where they are, they send out atomic time and the receiver calculates the actual time that "makes sense" based on the delays of four sats as the signal passes through the atmosphere. Four equations with four unknowns and differential eq math gets you a 3d position.
Depends on whether you want to know your altitude, that's considered part of "position" in my line of work, but when describing GPS people tend draw the "3 circles" and "where they intersect" is where you are, that's not even close to how it operates.
Depends on whether you want to know your altitude, that's considered part of "position" in my line of work, but when describing GPS people tend draw the "3 circles" and "where they intersect" is where you are, that's not even close to how it operates.
Fun fact, most people think GPS sats send out "position" data, when in fact they are flying at 20,000mph or whatever and have no idea where they are, they send out atomic time and the receiver calculates the actual time that "makes sense" based on the delays of four sats as the signal passes through the atmosphere. Four equations with four unknowns and differential eq math gets you a 3d position.
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