PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-12:12:50
G01     233.7          23.7                7.4 +/-    1.83      14.8 +/-    1.83  0.080 / 0.110
G03     303.4          62.3                4.9 +/-    1.32       5.4 +/-    1.32  0.090 / 0.120
G14     75.5           34.0                5.5 +/-    2.15       8.9 +/-    2.15  0.280 / 0.210
G16     151.7          36.7                6.4 +/-    1.30       9.8 +/-    1.30  0.210 / 0.170
G18     209.6          13.9                7.5 +/-    2.20      19.1 +/-    2.20  0.030 / 0.020
G22     230.2          76.1                5.8 +/-    0.25       5.9 +/-    0.25  0.030 / 0.030
G23     302.7          34.7                5.0 +/-    0.96       8.0 +/-    0.96  0.060 / 0.080
G26     110.5          50.9                6.8 +/-    0.57       8.4 +/-    0.57  0.050 / 0.080
G31     42.8           38.4                4.3 +/-    1.37       6.4 +/-    1.37  0.040 / 0.040
G32     92.8           10.3                6.2 +/-    2.62      17.2 +/-    2.62  0.050 / 0.040