PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/13-13:28:00
G02     269.3          78.9                5.7 +/-    0.48       5.8 +/-    0.48  0.130 / 0.130
G05     171.9          21.0                6.1 +/-    2.59      13.1 +/-    2.59  0.150 / 0.150
G06     39.9           49.4                4.1 +/-    0.88       5.2 +/-    0.88  0.080 / 0.100
G12     320.4          62.8                4.1 +/-    0.60       4.5 +/-    0.60  0.170 / 0.200
G17     78.7           15.5                5.5 +/-    1.79      13.6 +/-    1.79  0.030 / 0.030
G19     62.7           36.6                6.2 +/-    1.20       9.5 +/-    1.20  0.030 / 0.030
G24     233.4          28.9                6.7 +/-    1.72      12.0 +/-    1.72  0.030 / 0.040
G25     317.5          22.7                3.0 +/-    1.74       6.3 +/-    1.74  0.130 / 0.160