PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-18:12:40
G02     201.6          24.9               14.7 +/-    4.08      28.9 +/-    4.08  0.210 / 0.240
G06     165.4          61.0               12.1 +/-    0.75      13.6 +/-    0.75  0.140 / 0.300
G12     303.5          11.3                0.2 +/-   22.86       0.5 +/-   22.86  0.030 / 0.030
G17     26.7           56.3                9.1 +/-    0.76      10.7 +/-    0.76  0.040 / 0.030
G19     331.1          69.7                9.7 +/-    0.61      10.3 +/-    0.61  0.090 / 0.130
G24     305.4          34.0                8.9 +/-    1.73      14.5 +/-    1.73  0.100 / 0.100
G28     93.8           36.6               10.1 +/-    1.13      15.5 +/-    1.13  0.030 / 0.040
G30     157.8          10.2               11.1 +/-    5.73      30.7 +/-    5.73  0.050 / 0.040