PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-07:13:00
G02     26.7           61.4                1.8 +/-    0.64       2.0 +/-    0.64  0.030 / 0.040
G05     150.0          53.9                5.7 +/-    0.55       6.9 +/-    0.55  0.030 / 0.030
G06     48.3           25.7                1.6 +/-    2.38       3.0 +/-    2.38  0.100 / 0.090
G12     229.9          77.3                4.6 +/-    0.40       4.7 +/-    0.40  0.180 / 0.120
G19     92.6           15.2                4.6 +/-    1.51      11.3 +/-    1.51  0.170 / 0.390
G20     199.9          12.8                1.5 +/-    2.76       3.9 +/-    2.76  0.130 / 0.490
G25     308.5          45.7                2.5 +/-    1.02       3.3 +/-    1.02  0.020 / 0.020
G29     301.3          22.5                2.8 +/-    1.32       5.7 +/-    1.32  0.030 / 0.020