PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-11:57:40
G01     78.4           33.1                2.7 +/-    1.02       4.4 +/-    1.02  0.110 / 0.090
G07     133.2          34.7                4.2 +/-    0.84       6.8 +/-    0.84  0.110 / 0.100
G11     58.0           32.9                3.0 +/-    1.42       5.0 +/-    1.42  0.080 / 0.080
G13     285.3          36.7                5.2 +/-    1.57       7.9 +/-    1.57  0.070 / 0.070
G15     309.4          13.0                1.4 +/-    2.96       3.8 +/-    2.96  0.030 / 0.030
G17     224.1          65.7                5.5 +/-    0.91       6.0 +/-    0.91  0.030 / 0.030
G19     219.7          37.8                5.6 +/-    2.02       8.4 +/-    2.02  0.050 / 0.090
G28     8.4            60.4                3.7 +/-    1.27       4.1 +/-    1.27  0.060 / 0.100
G30     125.2          69.5                4.4 +/-    0.93       4.7 +/-    0.93  0.090 / 0.210