1. A system for monitoring satellite signal deformation, comprising in combination: a correlator operable to determine a plurality of correlation measurements for each of a plurality of satellites at points along a correlation curve, wherein each correlation measurement is based upon a correlation between a received satellite signal and a reference; a correlation transformation operable to subtract a mean over the plurality of satellites from each of the plurality of correlation measurements, whereby bias from front end signal deformation is removed from the plurality of correlation measurements; and a fault detector operable to determine a discriminator based on a plurality of differences between the plurality of correlation measurements and the correlation curve and to detect signal deformation based on a magnitude of the discriminator.