TECHNIQUES USED IN THE ANALYSIS OF DATA COLLECTED BY THE BIRMINGHAM SOLAR-OSCILLATIONS NETWORK (BISON) .2. FREQUENCY-DOMAIN ANALYSIS AND DATA MERGING

The Birmingham Solar-Oscillations Network (BiSON) consists of 6 solar observatories dedicated to the collection of full-disc solar Doppler v elocity data - these data are sensitive to the lowest spatial degrees of oscillation (0 less than or equal to l less than or equal to 4). In Paper I of this series, we described the calibration of raw data from the BiSON instruments to produce solar velocity residuals representin g the oscillations of the Sun's surface. In this paper, we discuss the combination of velocity residuals into time series - including a thor ough discussion of the treatment of data overlaps between sites - and the analysis of the power spectra computed from such time series to de rive the characteristics of the acoustic modes.