PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-04:43:00
G02     200.0          26.0                5.6 +/-    2.13      10.6 +/-    2.13  0.060 / 0.090
G06     173.4          55.2                5.7 +/-    0.60       6.8 +/-    0.60  0.080 / 0.090
G13     225.6          10.9                5.3 +/-    2.60      14.4 +/-    2.60  0.040 / 0.030
G17     24.7           57.8                3.0 +/-    0.76       3.5 +/-    0.76  0.060 / 0.030
G19     336.2          70.1                2.9 +/-    0.57       3.0 +/-    0.57  0.090 / 0.090
G24     308.3          31.2                3.0 +/-    1.53       5.2 +/-    1.53  0.080 / 0.110
G28     92.3           37.2                4.6 +/-    1.37       7.0 +/-    1.37  0.210 / 0.150