A correlation analysis of measured CO-concentration signals [articol]

Abstract

Ideal low-pass filtering can be used as a useful pre-processing method in order to eliminate the measuring noise from signals representing CO-concentration. Thereafter, the correlation coefficient proves to be a suitable tool in a comparative analysis of the data. If the signals are measured simultaneously and in the same location, using different instruments, the correlation analysis allows a comparison of the measuring systems. Applied to signals measured with a single instrument, the correlation analysis can put into evidence diurnal repeatability of CO-concentrations.