Title: Validation of GNSS‑derived global ionosphere maps for different solar activity levels: case studies for years 2014 and 2018
Authors: P. Wielgosz, B. Milanowska, A. Krypiak‑Gregorczyk, W. Jarmołowski
Journal: GPS Solutions
Publication type: article
DOI: 10.1007/s10291-021-01142-x