PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-03:57:40
G02     203.2          39.2                5.9 +/-    1.24       8.7 +/-    1.24  0.080 / 0.110
G06     161.9          70.3                6.3 +/-    0.42       6.6 +/-    0.42  0.080 / 0.120
G12     308.6          15.9                1.0 +/-    2.42       2.5 +/-    2.42  0.030 / 0.030
G17     36.9           48.7                3.0 +/-    1.74       3.9 +/-    1.74  0.030 / 0.030
G19     7.3            63.6                3.4 +/-    0.43       3.7 +/-    0.43  0.030 / 0.040
G24     296.1          38.7                2.3 +/-    2.10       3.4 +/-    2.10  0.040 / 0.050
G28     105.3          29.0                5.3 +/-    0.96       9.5 +/-    0.96  0.150 / 0.330