  This paper introduces a method for aligning solar observations from different
telescopes. We utilized helioprojective coordinates from the Solar Dynamics
Observatory (SDO) as a reference to align images from ALMA and IRIS. The
alignment is based on correlation analysis, employing both the Pearson
Correlation Coefficient (PCC) and the Structural Similarity Index (SSIM) for
assessing data correlations. PCC was preferred for its effectiveness with
diverse datasets and its computational efficiency compared to SSIM. The
alignment demonstrated less than 1.0\,arcsec variation in average centers
between the two methods, ensuring consistent results. We illustrate this method
using ALMA observations, labeled D06 in the Solar ALMA Science Archive (SALSA),
as a case study.
