PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-11:27:50
G01     70.2           32.9                2.5 +/-    1.19       4.1 +/-    1.19  0.030 / 0.030
G07     137.7          29.9                4.3 +/-    1.68       7.5 +/-    1.68  0.030 / 0.040
G11     52.5           29.5                2.1 +/-    0.83       3.8 +/-    0.83  0.110 / 0.250
G13     273.4          37.7               -0.1 +/-    8.97      -0.1 +/-    8.97  0.120 / 0.260
G15     306.9          12.5                2.2 +/-    1.53       5.9 +/-    1.53  0.030 / 0.050
G17     235.0          71.1               -4.3 +/-    9.52      -4.5 +/-    9.52  0.030 / 0.050
G18     47.7           17.1                1.0 +/-    0.96       2.4 +/-    0.96  0.060 / 0.140
G19     224.2          37.7                5.2 +/-    2.18       7.8 +/-    2.18  0.050 / 0.130
G28     18.8           59.5                3.7 +/-    0.78       4.3 +/-    0.78  0.120 / 0.230
G30     136.2          63.0               -3.1 +/-    9.51      -3.4 +/-    9.51  0.130 / 0.220