The theory of correlation functions and power spectral analyses is reviewed. Analog spectral analyses are then made of orthogonal components of geomagnetic micropulsations to investigate (a) the diurnal variation of pcs at a given station, (h) spatial variation of pcs at three pairs of stations differing respectively by 500 in longitude, 5.6° in latitude and 15° in latitude. Analog crosscorrelation technique is employed to study the phase relations among the three orthogonal components, both for pcs (pc-3 and pc-4) and pi-2 at a given station. [...]

Geldart, L. (Supervisor)