PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-10:57:50
G01     115.1          20.6                5.4 +/-    2.14      11.7 +/-    2.14  0.030 / 0.020
G07     91.4           63.9                5.5 +/-    1.24       6.0 +/-    1.24  0.030 / 0.030
G08     42.8           25.2                3.5 +/-    2.43       6.9 +/-    2.43  0.030 / 0.030
G09     174.4          19.1                5.0 +/-    1.06      11.2 +/-    1.06  0.030 / 0.030
G11     98.7           41.2                6.5 +/-    0.94       9.3 +/-    0.94  0.100 / 0.190
G13     315.2          23.2                1.8 +/-    2.09       3.7 +/-    2.09  0.110 / 0.170
G17     202.1          31.1                5.0 +/-    1.22       8.6 +/-    1.22  0.130 / 0.190
G18     88.7           22.2                4.6 +/-    1.63       9.6 +/-    1.63  0.090 / 0.200
G28     300.5          58.8                4.2 +/-    1.18       4.8 +/-    1.18  0.120 / 0.120
G30     350.2          71.0                4.9 +/-    0.42       5.1 +/-    0.42  0.110 / 0.170