PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-14:12:50
G01     101.0          28.4                8.0 +/-    1.28      14.5 +/-    1.28  0.030 / 0.020
G07     115.1          53.7                7.7 +/-    0.82       9.3 +/-    0.82  0.030 / 0.020
G08     41.6           14.8                6.1 +/-    1.19      15.3 +/-    1.19  0.030 / 0.040
G11     80.1           42.2                7.8 +/-    1.15      10.9 +/-    1.15  0.030 / 0.040
G13     304.5          32.1                6.8 +/-    1.43      11.3 +/-    1.43  0.050 / 0.140
G17     208.4          43.9                9.3 +/-    0.97      12.8 +/-    0.97  0.050 / 0.110
G18     73.7           24.6                7.1 +/-    1.04      13.9 +/-    1.04  0.060 / 0.100
G19     211.2          15.6                8.9 +/-    2.99      21.7 +/-    2.99  0.060 / 0.100
G28     329.4          61.7                6.1 +/-    0.47       6.9 +/-    0.47  0.080 / 0.130
G30     49.6           80.1                7.4 +/-    0.57       7.5 +/-    0.57  0.080 / 0.120