On the Practical Determination of Lunar and Luni-Solar Daily Variations in Certain Geophysical Data

Abstract

This is a continuation of two earlier papers, in which Chapman and Miller (9, cf. Miller 13) developed the mathematical theory of a convenient method for the determination of the lunar daily variations in geomagnetic and meteorological elements, and for estimating the probable error of any determination thus made. Important practical details of the work are given in the present paper, with examples of the calculations on suitable computing forms. It also includes a new application of the Chapman-Miller Method to the determination of a luni-solar periodic component first predicted and investigated in ionospheric data by Martyn(7).