Alvarez, J., Zabala Haro, M., Ruilova, J., & Vinueza, R. (2020). Study of the Effects of the Troposphere on the GPS L1 Signal in Riobamba city.: Array. Perspectives Scientific Journal, 2(1), 38–44. https://doi.org/10.47187/perspectivas.vol2iss1.pp38-44.2020