function [ax, co] = rock3(T)
% ROCK3 returns complex axial and coplanar field as a function of T
% for uniform infinite conducting medium - i.e. no boundary problem.
% The difference from ROCK1 is that ROCK3 doesnt include the
% inverse cube term nor scale factor, and it includes a signal-induction
% factor - see PhD for explanation.

% T is the ratio of distance to transition distance, i.e. T = kr

ax = 2*(1 + (1+i)*T);
co = 1 + (1+i)*T +2*i*T.^2;

scale = 1; %  exp(1)/(2 * sqrt(5));

ax = scale * ax .* exp(-i*T) .* exp(-T) .* T.^2;
co = scale * co .* exp(-i*T) .* exp(-T) .* T.^2;

