The Cramér-Rao Bound (CRB) for direction of arrival (DOA) estimation has been extensively studied over the past four decades. with a plethora of CRB expressions reported for various parametric models. In the literature. there are different methods to derive a closed-form CRB expression. https://www.chiggate.com/ja-morant-slam-dunk-memphis-grizzlies-8-x-10-basketball-photo-discount/