Wavefront error of PHI/HRT on Solar Orbiter at various heliocentric distances F. Kahil, A. Gandorfer, J. Hirzberger, D. Calchetti, J. Sinjan, G. Valori, S. K. Solanki, M. Van Noort, K. Albert, N. Albelo Jorge et al. (24 more) A&A, 675 (2023) A61 Published online: 30 June 2023 DOI: 10.1051/0004-6361/202346033