function [radius] = gen_radius(a,b);
% a=[x y] b=[x y]

% c=299792458.0; % rychlost svìtla v m/s

x=abs(a(1)-b(1));
y=abs(a(2)-b(2));
radius=sqrt(x^2+y^2);
% delay=r/c;
% phi = atan2(b,a);

end