Verifying The Limitation Of GNSS-PPP Derived Orthometric Heights In Engineering Design Using Non-Rigorous Approach. coou African Journal of Environmental Research, [S. l.], v. 4, n. 2, p. 113–129, 2023. Disponível em: https://ajer.org.ng/index.php/journal/article/view/106. Acesso em: 25 may. 2026.