Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 11 4 2025 06 29 SoHO/EIT, Stereo-A, and SDO/AIA View for Solar Coronal Differential Rotation 335 351 490 10.22128/ijaa.2025.996.1210 EN Zahra Shokri Department of Physics, Faculty of Science, University of Zanjan, University Blvd., Postal Code 45371-38791, Zanjan, Iran 0000-0003-4177-0645 Nasibe Alipour Department of Physics, University of Guilan, Rasht, 41335-1914, Iran 0000-0003-3643-5121 Hasan Rezaei Department of Geography, Faculty of Basic Sciences, Imam Ali Nazaja University, Postal Code: 1317893471, Tehran, Iran Mahdi Simiari Department of physics, Faculty of Science, Imam Ali University, Postal Code: 1317893471, Tehran, Iran Hossien Safari Department of Physics, Faculty of Science, University of Zanjan, University Blvd., Postal Code 45371-38791, Zanjan, Iran 0000-0003-2326-3201 Journal Article 2025 04 24 Differential rotation of the solar corona is challenging due to the nature of short-wavelength emissions. In this study, we aim to measure coronal differential rotation from different perspectives using observations from SoHO/EIT at 195 Å, Stereo-A/EUVI at 195 Å, and SDO/AIA at 193 Å on June 1st, 2010. To achieve this, we apply a method based on Zernike Moments and Support Vector Machine (SVM) to identify and track coronal bright points (CBPs) over a 10 hour observation period. In the heliographic coordinate system, we determine the angular velocity of the corona by fitting a linear time-dependent function to the central meridian distance of each CBP. By analyzing a collection of CBPs in the solar equatorial central region (within ±50º in longitude and latitude) from each perspective, we obtain the equatorial rotation rate (A) and the latitudinal rotation gradient (B). The results indicate values of 14.32, 14.54, and 14.51 ºday-1 with -2.93, -4.03, and -3.16 ºday-1 for SoHO, Stereo-A, and SDO, respectively. https://ijaa.du.ac.ir/article_490_556f2f213d04d417f5e89ee0d0a5ded2.pdf