I sample temperature at one sample per second (the hardware I am using takes the temperature at this rate, so this is the max I can efficiently sample.) The Nyquist rate for this signal would be 2 samples / second, correct? If so, both samples (for any given second) will be the same, and so redundant. For discrete time series does the Nyquist rate apply? I am sure my logic is wrong somewhere, but what am I missing?