function Rossby2(timer,lat,u,v)
%
%  This function plots a loglog plot of Rossby number versus 
%  the magnitude of the Left Hand Side of the momentum equation.
%
% ----------------------------------------------------------------
%  Written by Vassilis Zervakis, while at
%             AINCO - Interocean, Madrid, Spain, in January 1996.
% ----------------------------------------------------------------
%
[DUDt, fU] = lefthandside(timer,lat,u,v);
global float number
titlos = str2mat(['Float ' float]); 
% -------Calculate left hand side vector -------
LHS = DUDt + fU;
% -------Calculate Vector difference normalised -----
% ------------ by Coriolis acceleration -------------
RN  = (LHS ./ fU) - 1.;
theta = atan2( imag(RN), real(RN) );
RR  = abs(RN);
fig = figure;
polar(theta, RR, '+');
grid on;
title([ titlos, '  LHS/fU']);
