PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-19:58:10
G01     111.3          23.2               14.3 +/-    1.76      29.2 +/-    1.76  0.090 / 0.160
G07     99.0           61.9               13.4 +/-    0.82      15.0 +/-    0.82  0.100 / 0.170
G08     43.2           27.5                9.2 +/-    1.93      16.9 +/-    1.93  0.090 / 0.150
G09     176.1          18.1               14.9 +/-    0.89      34.4 +/-    0.89  0.080 / 0.150
G11     97.2           42.6               12.8 +/-    0.81      17.9 +/-    0.81  0.090 / 0.160
G13     313.0          25.5               10.8 +/-    0.83      20.8 +/-    0.83  0.110 / 0.160
G17     205.5          29.1               14.0 +/-    0.97      25.0 +/-    0.97  0.030 / 0.040
G18     85.7           23.5               12.8 +/-    1.67      25.8 +/-    1.67  0.030 / 0.040
G28     310.0          60.2               11.8 +/-    1.07      13.4 +/-    1.07  0.030 / 0.020
G30     14.0           76.1               12.9 +/-    0.94      13.2 +/-    0.94  0.020 / 0.020