PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-04:12:30
G02     209.4          54.0                5.4 +/-    0.61       6.6 +/-    0.61  0.090 / 0.220
G06     104.8          80.5                2.5 +/-    0.61       2.5 +/-    0.61  0.090 / 0.210
G12     315.3          27.5                2.4 +/-    1.31       4.4 +/-    1.31  0.110 / 0.180
G17     49.5           39.1                2.0 +/-    0.89       2.9 +/-    0.89  0.160 / 0.110
G19     29.8           54.3                1.8 +/-    1.43       2.2 +/-    1.43  0.070 / 0.090
G24     277.7          42.2                3.9 +/-    0.86       5.5 +/-    0.86  0.030 / 0.050
G28     117.2          19.0                3.9 +/-    1.23       8.7 +/-    1.23  0.030 / 0.020