PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/15-07:42:40
G02     244.4          78.2                2.1 +/-    0.41       2.1 +/-    0.41  0.150 / 0.330
G05     171.4          16.6                3.4 +/-    2.10       8.2 +/-    2.10  0.170 / 0.210
G06     39.9           62.7                1.4 +/-    0.49       1.6 +/-    0.49  0.120 / 0.110
G12     321.2          50.4                1.6 +/-    0.42       2.0 +/-    0.42  0.060 / 0.110
G17     71.4           22.3                1.2 +/-    2.04       2.4 +/-    2.04  0.070 / 0.080
G19     58.2           37.8                2.4 +/-    1.17       3.6 +/-    1.17  0.110 / 0.080
G24     246.4          34.9                5.5 +/-    2.01       8.7 +/-    2.01  0.030 / 0.040
G25     316.8          12.2               -1.3 +/-   16.72      -3.5 +/-   16.72  0.040 / 0.040