PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-11:58:00
G01     108.7          24.6                4.2 +/-    1.20       8.3 +/-    1.20  0.030 / 0.030
G07     104.2          59.4                4.3 +/-    1.10       5.0 +/-    1.10  0.020 / 0.030
G08     41.8           19.8                3.1 +/-    2.60       6.9 +/-    2.60  0.030 / 0.040
G09     173.6          13.1                3.0 +/-    1.68       7.8 +/-    1.68  0.030 / 0.030
G11     89.6           42.3                4.8 +/-    0.69       6.8 +/-    0.69  0.080 / 0.130
G13     310.7          27.8                0.8 +/-    1.20       1.4 +/-    1.20  0.110 / 0.130
G17     204.6          37.6                5.2 +/-    1.64       7.8 +/-    1.64  0.080 / 0.150
G18     81.5           23.8                1.5 +/-    1.83       3.0 +/-    1.83  0.100 / 0.130
G28     313.9          60.6                2.9 +/-    1.04       3.2 +/-    1.04  0.060 / 0.150
G30     8.7            76.5                4.5 +/-    0.55       4.6 +/-    0.55  0.080 / 0.120