PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-01:57:50
G01     53.2           27.4                1.5 +/-    2.24       2.7 +/-    2.24  0.040 / 0.070
G06     179.9          20.2                4.6 +/-    1.43      10.0 +/-    1.43  0.040 / 0.050
G07     145.2          16.0                4.8 +/-    2.44      11.7 +/-    2.44  0.100 / 0.100
G11     46.6           20.4                3.2 +/-    2.55       7.1 +/-    2.55  0.110 / 0.130
G13     255.2          32.1                4.5 +/-    2.61       7.5 +/-    2.61  0.020 / 0.030
G15     286.3          16.5                4.7 +/-    1.27      11.4 +/-    1.27  0.020 / 0.020
G17     286.7          77.9                4.4 +/-    0.62       4.5 +/-    0.62  0.100 / 0.140
G19     241.8          57.4                5.7 +/-    2.68       6.7 +/-    2.68  0.130 / 0.160
G28     48.1           53.8                3.5 +/-    1.22       4.2 +/-    1.22  0.160 / 0.300
G30     147.0          40.9                5.3 +/-    1.01       7.6 +/-    1.01  0.260 / 0.210