PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-14:42:40
G01     82.7           33.0                8.3 +/-    2.03      13.7 +/-    2.03  0.030 / 0.030
G07     130.8          40.0               10.5 +/-    0.73      15.3 +/-    0.73  0.030 / 0.020
G11     61.4           36.4                9.1 +/-    1.17      14.1 +/-    1.17  0.040 / 0.070
G13     286.9          37.6               11.2 +/-    0.76      16.9 +/-    0.76  0.040 / 0.070
G15     312.9          10.9               -3.7 +/-   18.89     -10.1 +/-   18.89  0.070 / 0.110
G17     219.9          60.0               11.7 +/-    1.63      13.3 +/-    1.63  0.060 / 0.080
G18     57.3           22.1                7.7 +/-    1.62      16.2 +/-    1.62  0.050 / 0.090
G19     217.9          29.9               11.9 +/-    2.99      20.9 +/-    2.99  0.070 / 0.100
G28     1.0            61.2                8.8 +/-    0.70       9.9 +/-    0.70  0.170 / 0.210
G30     120.2          72.1               11.4 +/-    0.49      11.9 +/-    0.49  0.090 / 0.190