PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/01-04:27:30
G02     199.3          21.1                8.5 +/-    1.30      18.3 +/-    1.30  0.040 / 0.080
G06     174.9          49.7               11.1 +/-    1.07      14.0 +/-    1.07  0.050 / 0.070
G13     229.2          14.2                7.1 +/-    1.65      17.9 +/-    1.65  0.060 / 0.130
G17     18.8           61.7                5.9 +/-    0.74       6.6 +/-    0.74  0.070 / 0.110
G19     319.9          71.4                5.3 +/-    0.37       5.5 +/-    0.37  0.040 / 0.030
G24     311.6          27.7                3.4 +/-    1.51       6.2 +/-    1.51  0.020 / 0.030
G28     86.8           40.0                6.8 +/-    0.93       9.8 +/-    0.93  0.170 / 0.340
G30     155.8          12.8                8.1 +/-    1.70      21.2 +/-    1.70  0.140 / 0.330