PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-15:42:50
G01     314.5          26.0                7.5 +/-    1.62      14.3 +/-    1.62  0.090 / 0.190
G10     94.1           47.5                8.1 +/-    0.89      10.6 +/-    0.89  0.140 / 0.180
G11     295.7          25.3                6.3 +/-    1.47      12.2 +/-    1.47  0.030 / 0.040
G14     325.2          70.3                7.4 +/-    0.71       7.8 +/-    0.71  0.030 / 0.040
G22     305.9          19.2                6.4 +/-    2.78      14.3 +/-    2.78  0.040 / 0.050
G25     92.7           13.0                8.6 +/-    2.96      22.4 +/-    2.96  0.040 / 0.040
G31     172.3          54.1                9.3 +/-    1.42      11.2 +/-    1.42  0.240 / 0.280
G32     25.0           59.4                8.1 +/-    1.20       9.3 +/-    1.20  0.120 / 0.200