PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-15:57:50
G02     205.8          38.8               14.3 +/-    2.40      21.3 +/-    2.40  0.060 / 0.080
G06     147.9          74.9               11.6 +/-    1.10      12.0 +/-    1.10  0.060 / 0.090
G12     311.2          20.4                9.9 +/-    1.34      21.6 +/-    1.34  0.160 / 0.220
G17     44.0           42.5                8.7 +/-    0.31      12.1 +/-    0.31  0.150 / 0.210
G19     17.6           60.1                9.1 +/-    0.66      10.3 +/-    0.66  0.030 / 0.060
G24     292.9          39.7                8.8 +/-    1.49      12.8 +/-    1.49  0.030 / 0.050
G28     108.7          26.6               11.9 +/-    2.09      22.3 +/-    2.09  0.050 / 0.100