PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-14:58:00
G01     118.9          18.1               11.1 +/-    0.86      25.5 +/-    0.86  0.030 / 0.040
G07     80.8           66.6               10.2 +/-    0.76      11.0 +/-    0.76  0.020 / 0.030
G08     44.9           31.6                8.9 +/-    0.52      15.1 +/-    0.52  0.040 / 0.040
G09     176.2          24.8                9.2 +/-    2.19      18.1 +/-    2.19  0.040 / 0.040
G11     106.3          40.1               11.6 +/-    0.43      16.8 +/-    0.43  0.160 / 0.320
G13     317.5          19.7                7.9 +/-    3.46      17.6 +/-    3.46  0.170 / 0.370
G17     202.0          23.9                8.8 +/-    2.03      17.7 +/-    2.03  0.090 / 0.380
G18     94.0           20.9               10.2 +/-    0.70      21.9 +/-    0.70  0.130 / 0.500
G28     293.1          57.4                8.4 +/-    1.15       9.8 +/-    1.15  0.050 / 0.120
G30     346.2          68.6                8.9 +/-    0.72       9.5 +/-    0.72  0.040 / 0.130