Scattered jet model (J75) with different position angle orientations. Each column shows a scattered jet model with inclination i = 75° at frequencies of 22 GHz, 43 GHz, and 86 GHz (left to right). Rows from top to bottom show the scattered jet model including refractive noise with position angles of the BH spin axis of PA = 0° ,45° ,90° (rotated east of north counterclockwise). Their identifications are J75, J75^#, and J75^*, respectively. The scattering screen remains fixed at PA_G = 81.9°. The FOV of the 22 GHz images(left column) is doubled compared to the FOV at 43 GHz and 86 GHz. The green dot indicates the intensity-weighted centroid of each image. Black cross-hairs indicate the location of the intensity-weighted centroid of the unscattered jet model.