PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-04:43:00
G01     41.2           16.3                2.9 +/-    2.22       6.9 +/-    2.22  0.040 / 0.060
G06     177.8          36.5                6.5 +/-    1.42      10.1 +/-    1.42  0.050 / 0.060
G13     238.6          22.0                6.4 +/-    2.56      13.5 +/-    2.56  0.260 / 0.220
G15     270.0          12.5                5.1 +/-    2.61      13.5 +/-    2.61  0.180 / 0.270
G17     0.8            70.5                4.0 +/-    0.33       4.2 +/-    0.33  0.030 / 0.040
G19     280.0          69.8                3.5 +/-    0.58       3.7 +/-    0.58  0.030 / 0.030
G24     316.9          18.5                1.8 +/-    1.91       4.1 +/-    1.91  0.260 / 0.200
G28     72.6           46.2                3.6 +/-    1.04       4.8 +/-    1.04  0.120 / 0.180
G30     153.6          24.4                8.1 +/-    1.88      16.0 +/-    1.88  0.070 / 0.090