PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-13:28:00
G02     205.7          34.0                7.6 +/-    1.46      12.3 +/-    1.46  0.070 / 0.090
G06     150.0          73.0                8.3 +/-    0.87       8.6 +/-    0.87  0.090 / 0.080
G12     310.2          20.7                3.8 +/-    2.08       8.2 +/-    2.08  0.120 / 0.220
G17     40.3           45.5                5.8 +/-    0.95       7.8 +/-    0.95  0.160 / 0.280
G19     356.8          65.4                5.4 +/-    0.42       5.9 +/-    0.42  0.030 / 0.020
G24     291.6          41.2                7.2 +/-    7.80      10.2 +/-    7.80  0.030 / 0.020
G28     105.1          29.8                7.7 +/-    1.47      13.6 +/-    1.47  0.040 / 0.030