___________ is conducted to calibrate the mount azimuth and alignment.

• A. PSOT 10
• B. PSOT 30
• C. PSOT 15
• D. PSOT 20

Answer: (D)

Calibrating mount azimuth and alignment ensures the horizontal rotation of the mount matches the true reference direction and that pointing calculations reflect where the telescope is actually aimed. The PSOT 20 procedure is designed for this exact task, providing the steps to measure and correct any offset between what the mount reads as its azimuth and the real azimuth, so the alignment with celestial coordinates is accurate. Running PSOT 20 establishes the correct azimuth baseline, which is essential for precise slewing and reliable tracking. The other PSOT options relate to different calibration tasks and do not address azimuth alignment specifically, so they wouldn’t achieve the same correction.