Path: SpacecraftEstimation/StellarCatalog
% Assess the global and local uniformity of a star catalog The eigenvalues of u*u'/N will be each 1/3 if the stars are uniformly distributed. We calculate a single measure of global uniformity from these eigenvalues as sum(eigs * log(3*eigs). Phi should be small. Type AssessCatalog for a demo of 3 3x3 identify matrices. -------------------------------------------------------------------------- ------ Inputs ------ uStars (3,:) Star unit vectors ------- Outputs ------- phi (1,1) Uniformity eigs (3,1) Eigenvalues --------------------------------------------------------------------------
Back to the SpacecraftEstimation Module page