PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/14-14:27:40
G01     107.5          25.3               12.5 +/-    1.72      24.3 +/-    1.72  0.020 / 0.020
G07     106.1          58.7               12.1 +/-    1.02      13.9 +/-    1.02  0.030 / 0.020
G08     41.9           20.3                9.2 +/-    1.75      20.2 +/-    1.75  0.030 / 0.030
G09     174.0          12.8               11.2 +/-    1.59      29.4 +/-    1.59  0.030 / 0.050
G11     89.0           42.6               11.6 +/-    0.74      16.1 +/-    0.74  0.070 / 0.130
G13     309.9          28.5                9.8 +/-    2.19      17.7 +/-    2.19  0.070 / 0.150
G17     205.7          37.2               11.5 +/-    1.00      17.5 +/-    1.00  0.100 / 0.130
G18     80.6           24.1               11.3 +/-    2.42      22.5 +/-    2.42  0.080 / 0.140
G28     316.7          60.9               10.9 +/-    0.94      12.3 +/-    0.94  0.090 / 0.140
G30     17.7           77.6               11.8 +/-    0.76      12.1 +/-    0.76  0.110 / 0.130