PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-18:42:50
G02     201.6          25.7               10.0 +/-    1.89      19.2 +/-    1.89  0.130 / 0.240
G06     165.1          61.7               10.9 +/-    0.66      12.2 +/-    0.66  0.240 / 0.290
G12     303.7          11.5                2.1 +/-   20.34       5.8 +/-   20.34  0.070 / 0.140
G17     26.9           56.1               10.2 +/-    0.91      12.0 +/-    0.91  0.130 / 0.110
G19     333.5          69.5                9.7 +/-    0.42      10.3 +/-    0.42  0.030 / 0.030
G24     305.0          34.3                8.3 +/-    1.86      13.3 +/-    1.86  0.050 / 0.040
G28     94.4           36.2               10.8 +/-    1.08      16.8 +/-    1.08  0.040 / 0.030