[time-nuts] over-determined clock solution
holrum at hotmail.com
Sat Jun 25 13:08:16 EDT 2016
It is basically what most people call "position hold mode" where the receiver has known (and accurate) fixed coordinates. With lat/lon/alt known, it can solve for time with just one satellite visible. Or, if more than one sat is visible, its time solutions can be more accurate because noise in the lat/lon/alt calculations won't affect the time solutions. The gotcha is any error in your fixed position coordinates directly contribute to time errors (figure 1 nanosecond per foot of error).
More information about the time-nuts