PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-18:27:50
G01     111.8          22.9               12.5 +/-    1.34      25.7 +/-    1.34  0.080 / 0.120
G07     98.2           62.1               11.7 +/-    0.59      13.1 +/-    0.59  0.070 / 0.130
G08     43.0           26.7                8.8 +/-    1.49      16.5 +/-    1.49  0.030 / 0.040
G09     175.9          18.2               10.8 +/-    1.87      24.9 +/-    1.87  0.030 / 0.030
G11     97.1           42.5               12.1 +/-    0.72      16.9 +/-    0.72  0.040 / 0.060
G13     313.2          25.3               12.1 +/-    3.10      23.6 +/-    3.10  0.040 / 0.070
G17     205.0          29.8               12.5 +/-    1.12      22.0 +/-    1.12  0.040 / 0.080
G18     86.0           23.4                9.3 +/-    1.18      18.9 +/-    1.18  0.040 / 0.100
G28     308.8          60.1               10.9 +/-    0.77      12.3 +/-    0.77  0.030 / 0.040
G30     9.3            75.5               12.3 +/-    0.35      12.6 +/-    0.35  0.030 / 0.040