Why the Savitzky-Golay filter?
A Savitzky–Golay filter is a digital filter that can be applied to a set of digital data points for the purpose of smoothing the data, that is, to increase the precision of the data without distorting the signal tendency.
What is a Savitzky-Golay Filter IEEE Signal Processing Magazine?
Summary: Savitzky-Golay (SG) filtering is a classical signal smoothing technique based on the local least squares approximation of the analyzed signal by a linear combination of known functions of time (origi- Maciej Ciołek, Marcin Gańcza, Artur Kaczmarek. Computer Science. 2022.