ry in the ECC as column vector
<math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mi>Œ∑</mi><annotation encoding="application/x-tex">\eta</annotation></semantics></math>
as shown by Equation 11 of Heun, Owen, and Brockway <span class="citation">(2018)</span>.</p>
<p><math display="block" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>ùê†</mi><mo>=</mo><mi>ùêï</mi><mi>ùê¢</mi></mrow><annotation encoding="application/x-tex">\mathbf{g} = \mathbf