PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-05:58:00
G02     203.4          39.7                5.6 +/-    0.82       8.2 +/-    0.82  0.080 / 0.120
G06     165.0          69.9                6.0 +/-    0.52       6.3 +/-    0.52  0.080 / 0.120
G12     308.9          16.2                2.8 +/-    3.20       6.7 +/-    3.20  0.060 / 0.080
G17     38.7           47.3                3.0 +/-    1.53       4.0 +/-    1.53  0.060 / 0.060
G19     9.5            62.9                3.4 +/-    0.58       3.8 +/-    0.58  0.150 / 0.210
G24     295.7          38.8                2.7 +/-    1.76       4.0 +/-    1.76  0.260 / 0.320
G28     105.9          28.5                7.2 +/-    1.24      13.0 +/-    1.24  0.030 / 0.040