PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-12:27:50
G01     106.2          25.9                4.0 +/-    1.74       7.7 +/-    1.74  0.020 / 0.030
G07     108.2          57.5                5.3 +/-    0.29       6.2 +/-    0.29  0.040 / 0.030
G08     41.6           18.0                4.5 +/-    2.52      10.5 +/-    2.52  0.030 / 0.030
G09     173.2          11.0                2.7 +/-    2.40       7.2 +/-    2.40  0.040 / 0.040
G11     86.3           42.4                5.8 +/-    0.82       8.1 +/-    0.82  0.040 / 0.040
G13     308.8          29.4                4.3 +/-    1.69       7.7 +/-    1.69  0.090 / 0.050
G17     205.7          39.9                5.8 +/-    0.80       8.4 +/-    0.80  0.090 / 0.140
G18     78.9           24.2                4.4 +/-    2.18       8.8 +/-    2.18  0.090 / 0.120
G28     318.9          61.0                3.2 +/-    0.98       3.6 +/-    0.98  0.080 / 0.160
G30     19.0           78.1                4.9 +/-    0.54       5.0 +/-    0.54  0.250 / 0.190