PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-20:12:50
G01     119.0          18.1               14.4 +/-    1.91      33.3 +/-    1.91  0.080 / 0.040
G07     80.2           66.8               14.3 +/-    0.74      15.4 +/-    0.74  0.070 / 0.050
G08     46.2           35.2               11.5 +/-    1.04      18.2 +/-    1.04  0.110 / 0.080
G09     177.5          26.4               13.9 +/-    1.20      26.4 +/-    1.20  0.130 / 0.050
G11     108.9          40.0               14.5 +/-    0.55      21.1 +/-    0.55  0.040 / 0.010
G13     317.8          19.2               11.2 +/-    1.28      25.1 +/-    1.28  0.040 / 0.010
G17     203.2          20.6               16.0 +/-    2.41      34.7 +/-    2.41  0.040 / 0.010
G18     94.6           20.9               12.8 +/-    1.83      27.6 +/-    1.83  0.030 / 0.010
G28     293.9          57.7               13.8 +/-    1.20      16.1 +/-    1.20  0.100 / 0.210
G30     352.0          70.2               13.6 +/-    0.89      14.3 +/-    0.89  0.120 / 0.250