PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-18:42:50
G01     105.0          26.7               11.1 +/-    1.55      20.9 +/-    1.55  0.260 / 0.160
G07     109.7          57.1               12.5 +/-    0.49      14.6 +/-    0.49  0.140 / 0.150
G08     42.1           20.8                8.7 +/-    2.57      18.8 +/-    2.57  0.030 / 0.020
G09     174.6          12.0               11.9 +/-    1.71      31.9 +/-    1.71  0.030 / 0.030
G11     87.4           43.1               12.0 +/-    1.46      16.7 +/-    1.46  0.020 / 0.050
G13     308.1          29.7               10.4 +/-    1.55      18.4 +/-    1.55  0.030 / 0.040
G17     207.6          36.8               12.3 +/-    0.98      18.8 +/-    0.98  0.040 / 0.050
G18     78.5           24.6               10.8 +/-    1.26      21.2 +/-    1.26  0.050 / 0.050
G28     322.6          61.3                9.7 +/-    0.78      10.9 +/-    0.78  0.060 / 0.140
G30     39.0           79.0               12.3 +/-    0.97      12.5 +/-    0.97  0.070 / 0.150