function [plotHandles] = plotOffsetVariations(pAxesHandle, pVariationResults, pColor)
%PLOTOFFSETVARIATIONS Summary of this function goes here
%   Detailed explanation goes here

%% Parameter check
if nargin < 3
    pColor = [0 0 0];
end

%% Initialize return variables
plotHandles = {};

%% Prepare variables for plotting
% get plotting positions
lat = cellfun(@(x) x.observations(end, 1), pVariationResults)';
lon = cellfun(@(x) x.observations(end, 2), pVariationResults)';
dates = cellfun(@(x) x.date, pVariationResults)';

%% Plot the eigenvectors and ellipse for every position
hold(pAxesHandle, 'on');
for i = 1:length(dates)
    if isnan(dates(i))
        continue;
    end
    currentResults = pVariationResults{i};
    d = sqrt(diag(currentResults.D));
    % prepare data for ellipse
    ecc = axes2ecc(max(d), min(d));
    [y, x] = ellipse1(lat(i), lon(i), [max(d) ecc]);
    
    plotHandles = [ ...
        plotHandles, ...
        { ...
            line([lon(i), lon(i)+currentResults.V(2, 1)*d(1)], [lat(i), lat(i)+currentResults.V(1, 1)*d(2)]), ...
            line([lon(i), lon(i)+currentResults.V(2, 2)*d(1)], [lat(i), lat(i)+currentResults.V(1, 2)*d(2)]), ...
            plot(x, y, 'Color', pColor) ...
        } ...
        ];
end
hold(pAxesHandle, 'off');

end