Do GPS receivers send pseudo random codes to the constellation of satellites?

noDo GPS receivers send pseudo random codes to the constellation of satellites?think about this; if you are a gps receiver, how a satellite know where you are at ( it needs a signal from the receiver don't you think? ) they may or may not be random.Do GPS receivers send pseudo random codes to the constellation of satellites?GPS receivers are receivers. They do not send anything to the satellite (which is good because the satellites aren't listening anyhow). All the data transmission is from the satellite (or pseudolite or augmentation transmitter) to the GPS receiver.