TAKANA, A.; AHMED, B.; FIMBA, D. E. Evaluation of GNSS Observation Timing using Dilution of Precision and Satellite Visibility Analysis in North-East, Nigeria. Journal of Spatial Information Sciences, Awka, Nigeria, v. 3, n. 1, p. 277–289, 2026. DOI: 10.5281/. Disponível em: https://journals.unizik.edu.ng/jsis/article/view/8384. Acesso em: 14 jul. 2026.