CHATTERJEE, S.; PUROHIT, P. K. Effect of Ionospheric Perturbation on GPS Observation over Low Latitude Region, Bhopal. Journal of Scientific Research, [S. l.], v. 4, n. 3, p. 577–587, 2012. DOI: 10.3329/jsr.v4i3.10146. Disponível em: https://banglajol.info/index.php/JSR/article/view/10146. Acesso em: 17 aug. 2024.