PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/02-14:57:30
G02     210.0          45.9                9.7 +/-    0.72      12.9 +/-    0.72  0.060 / 0.080
G06     94.9           78.3                8.8 +/-    0.66       9.0 +/-    0.66  0.050 / 0.090
G12     316.2          31.8                9.1 +/-    0.98      15.4 +/-    0.98  0.070 / 0.100
G17     50.0           37.3                7.0 +/-    1.00      10.6 +/-    1.00  0.070 / 0.100
G19     19.4           58.8                8.3 +/-    0.47       9.6 +/-    0.47  0.030 / 0.030
G24     277.6          43.2                7.4 +/-    1.17      10.3 +/-    1.17  0.030 / 0.030
G28     114.7          21.7                8.4 +/-    1.46      17.7 +/-    1.46  0.050 / 0.040