On-sky performance refers to the evaluation of the effectiveness and accuracy of astronomical instruments, telescopes, or techniques under actual observing conditions. This research area focuses on testing and assessing the capabilities and limitations of these instruments in real-world scenarios, such as observing celestial objects in the night sky. On-sky performance evaluations may involve measuring various parameters such as resolution, sensitivity, image quality, and observational efficiency to ensure that the instrument or technique is performing as expected and meeting the requirements of the scientific objectives. This research is essential for optimizing and improving the capabilities of astronomical instruments and ensuring the quality of the data collected during astronomical observations.