INTERPRETATION OF BOREHOLE-INCLINOMETER DATA - A GENERAL-THEORY APPLIED TO A NEW INSTRUMENT

Borehole inclinometers are standard equipment for field glaciologists and are commonly used for investigating thc flow law of ice and for measuring the spatial position of englacial and sub-surface sensors. Thc recent development, at the University of British Columbia (UBC), of a prototype inclinometer that employs a three-component fluxgate magentometer to obtain compass bearing has stimulated our interest in borehole inclinometry. Following a review of various approaches to glacier inclinometry, we present a unified theory of data interpretation that can be applied to all inclinometers, discuss thc application of the theory to thc UBC inclinometer, and discuss the sensitivity of the theory to error in the data.