Here, Γ is a diagonal matrix containing the eigenvalues of I , and V is an orthonormal matrix of eigenvectors. The coefficients of the raw parameters that combine into orthogonal parameter combinations are provided by elements of these eigenvectors. It is assumed throughout this report that the eigenvalues, and the corresponding eigenvectors, are sorted from largest to smallest. It will be seen below that the eigenvalue decomposition of I also leads to the Orthogonal Basis Parameterization strategy advocated in this report.