PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-22:57:30
G07     341.9          60.9                9.2 +/-    0.60      10.4 +/-    0.60  0.120 / 0.140
G08     91.7           53.4                9.5 +/-    0.71      11.5 +/-    0.71  0.140 / 0.100
G09     187.7          68.2                9.8 +/-    0.86      10.5 +/-    0.86  0.050 / 0.040
G11     144.1          16.0               11.4 +/-    2.52      27.7 +/-    2.52  0.030 / 0.040
G23     156.9          34.3                9.1 +/-    0.83      14.7 +/-    0.83  0.090 / 0.140
G27     49.3           27.6                6.1 +/-    1.86      11.2 +/-    1.86  0.050 / 0.090
G28     242.7          34.8               10.1 +/-    2.82      16.1 +/-    2.82  0.150 / 0.440
G30     309.9          42.9                8.5 +/-    0.62      11.9 +/-    0.62  0.130 / 0.340