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math.RA2025
Closed-form Solution of Wahba's Problem for Pairwise Similar Quaternions
Hristina Radak, Christian Scheunert, Frank H. P. Fitzek
Wahba's problem is fundamental to spacecraft attitude estimation, seeking the optimal rotation that minimizes the weighted misalignment between sets of vector observations. Traditi…
math.RA2025
On solutions of singular Sylvester equations in quaternions
Hristina Radak, Christian Scheunert, Frank H. P. Fitzek
We study the singular Sylvester equations and over the quaternions. Working entirely within quaternion algebra, we give constructive derivations of the…