YADAV, J. K. S. ., GIRI , R. K. . and MALIK, D. K. . (2010) “Effect of broadcast and precise satellite orbits in the estimation of Zenith tropospheric delay and integrated precipitable water vapour from GPS”, MAUSAM, 61(2), pp. 197–202. doi: 10.54302/mausam.v61i2.801.