PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-02:57:50
G01     40.0           14.5                3.6 +/-    2.67       9.0 +/-    2.67  0.050 / 0.050
G02     198.7          12.2                4.5 +/-    5.89      11.9 +/-    5.89  0.060 / 0.050
G06     176.3          40.3                6.6 +/-    1.33       9.6 +/-    1.33  0.060 / 0.080
G13     236.3          20.3                4.9 +/-    2.37      10.7 +/-    2.37  0.060 / 0.060
G15     267.8          11.5                5.0 +/-    1.41      13.4 +/-    1.41  0.020 / 0.030
G17     2.7            69.4                4.8 +/-    0.73       5.1 +/-    0.73  0.030 / 0.030
G19     286.8          70.4                3.3 +/-    0.82       3.5 +/-    0.82  0.150 / 0.300
G24     316.0          20.7                1.2 +/-    2.38       2.5 +/-    2.38  0.130 / 0.260
G28     75.7           45.0                5.3 +/-    1.04       7.2 +/-    1.04  0.250 / 0.250
G30     154.0          21.1                5.9 +/-    1.68      12.7 +/-    1.68  0.440 / 0.430