1. A method for enhancing the accuracy processing measurements of a physical quantity comprising the steps of: determining a trend for a plurality of measurements; determining, for each of at least one of the plurality of measurements, an associated residual between the trend and the measurement; determining, for each of at least one of the associated residuals, an interpolated value for the residual; comparing, for each of the at least one associated residuals, the associated residual to the interpolated value of the residual to identify an anomalous associated measurement; in response to identification of an anomalous measurement, discarding the anomalous measurement; and generating an output of all measurements of the physical quantity not discarded as anomalous.