PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-13:27:40
G01     69.7           32.8                6.8 +/-    1.14      11.2 +/-    1.14  0.030 / 0.040
G07     137.9          30.0                6.9 +/-    1.26      12.1 +/-    1.26  0.030 / 0.040
G11     52.3           29.1                6.2 +/-    0.93      11.1 +/-    0.93  0.060 / 0.130
G13     272.9          37.6                5.4 +/-    1.28       8.1 +/-    1.28  0.060 / 0.130
G15     304.8          13.7                2.2 +/-    2.13       5.6 +/-    2.13  0.050 / 0.070
G17     235.9          71.4                8.5 +/-    0.57       8.9 +/-    0.57  0.050 / 0.080
G18     47.8           17.3                4.7 +/-    0.85      11.1 +/-    0.85  0.050 / 0.110
G19     224.6          39.3                7.1 +/-    1.35      10.5 +/-    1.35  0.070 / 0.110
G28     20.8           59.1                6.6 +/-    0.45       7.5 +/-    0.45  0.100 / 0.210
G30     136.6          62.6                8.8 +/-    0.71       9.8 +/-    0.71  0.100 / 0.210