Imagine that a minimal GPS device is attached to a moving object (animal, shipping container, geocache object, etc). Every few months, data from the device is downloaded for post-processing.
What is the minimal set of data the device must collect so that post-processing can ascertain the device's position history?
Could the device simply store demodulated L1 signals with a timestamp? Would that be enough to calculate the latitude, longitude and elevation during post-processing?
I'm interested in understanding how much GPS processing must be done on the receiver and how much can be postponed to post-processing.
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