PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-00:27:50
G01     106.3          26.0                7.3 +/-    1.38      13.9 +/-    1.38  0.040 / 0.070
G07     107.9          57.9                9.0 +/-    0.63      10.5 +/-    0.63  0.040 / 0.050
G08     42.2           21.7                7.2 +/-    2.91      15.2 +/-    2.91  0.090 / 0.090
G09     175.4          13.8                8.9 +/-    1.16      22.9 +/-    1.16  0.070 / 0.090
G11     91.6           43.5               10.4 +/-    0.44      14.3 +/-    0.44  0.090 / 0.320
G13     309.5          28.4                6.2 +/-    0.78      11.3 +/-    0.78  0.190 / 0.260
G17     206.7          37.2               10.2 +/-    1.10      15.6 +/-    1.10  0.070 / 0.130
G19     209.3          14.0                9.3 +/-    1.07      23.8 +/-    1.07  0.070 / 0.130
G28     320.9          61.3                7.1 +/-    0.74       8.0 +/-    0.74  0.040 / 0.050
G30     50.7           78.0                8.6 +/-    1.07       8.8 +/-    1.07  0.040 / 0.060