PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-04:28:10
G01     51.7           26.5                3.5 +/-    2.72       6.6 +/-    2.72  0.030 / 0.050
G06     180.7          20.5                4.9 +/-    1.47      10.6 +/-    1.47  0.040 / 0.060
G07     145.7          14.1                6.6 +/-    3.08      16.7 +/-    3.08  0.160 / 0.330
G11     45.6           17.8                4.0 +/-    2.76       9.3 +/-    2.76  0.200 / 0.370
G13     253.6          31.2                5.1 +/-    2.83       8.6 +/-    2.83  0.160 / 0.240
G15     284.6          16.3                4.7 +/-    1.06      11.2 +/-    1.06  0.110 / 0.180
G17     303.5          78.8                5.6 +/-    0.56       5.7 +/-    0.56  0.020 / 0.020
G19     244.7          59.4                6.5 +/-    1.24       7.4 +/-    1.24  0.020 / 0.020
G28     50.8           53.1                3.8 +/-    0.74       4.6 +/-    0.74  0.150 / 0.170
G30     148.0          40.2                5.7 +/-    0.51       8.3 +/-    0.51  0.110 / 0.140