1. A method for detecting and indicating a shift in redundant sensor signals, comprising: receiving a sensor channel closeness signal for two or more redundant sensors; receiving a spike confidence signal for at least one of the two or more redundant sensors; receiving a spike duration signal for the at least one of the two or more redundant sensors; determining a shift confidence based at least in part on the received sensor channel closeness signal, the received spike confidence signal, and the received spike duration signal; and outputting the shift confidence.