PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-06:57:50
G02     209.8          54.5                6.5 +/-    1.46       7.8 +/-    1.46  0.090 / 0.280
G06     114.9          81.3                5.8 +/-    0.96       5.9 +/-    0.96  0.140 / 0.390
G12     315.5          27.8                3.1 +/-    1.64       5.7 +/-    1.64  0.080 / 0.070
G17     51.3           37.2                3.3 +/-    0.93       5.0 +/-    0.93  0.080 / 0.110
G19     31.4           53.5                4.1 +/-    0.50       5.0 +/-    0.50  0.050 / 0.110
G24     277.4          42.1                4.1 +/-    1.72       5.8 +/-    1.72  0.050 / 0.130
G28     117.7          18.5                8.1 +/-    1.71      18.5 +/-    1.71  0.040 / 0.070