PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/26-04:28:00
G01     40.9           15.8                2.4 +/-    1.06       5.8 +/-    1.06  0.050 / 0.070
G02     198.7          10.5                0.1 +/-    7.67       0.2 +/-    7.67  0.060 / 0.080
G06     177.6          37.3                7.5 +/-    2.19      11.4 +/-    2.19  0.130 / 0.300
G13     238.0          21.6                6.6 +/-    1.34      13.9 +/-    1.34  0.110 / 0.280
G15     269.4          12.2                5.9 +/-    1.69      15.6 +/-    1.69  0.140 / 0.210
G17     1.6            70.2                5.0 +/-    0.68       5.3 +/-    0.68  0.180 / 0.190
G19     281.8          70.0                5.1 +/-    0.45       5.4 +/-    0.45  0.130 / 0.250
G24     316.7          19.0                3.2 +/-    2.92       7.2 +/-    2.92  0.130 / 0.280
G28     73.4           45.9                4.2 +/-    0.81       5.6 +/-    0.81  0.030 / 0.030
G30     153.7          23.6                5.7 +/-    2.42      11.5 +/-    2.42  0.030 / 0.030