PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-11:12:40
G01     40.8           15.6                3.4 +/-    1.56       8.3 +/-    1.56  0.050 / 0.070
G06     176.7          38.3                8.4 +/-    1.44      12.6 +/-    1.44  0.060 / 0.090
G13     238.8          21.6                6.0 +/-    3.19      12.7 +/-    3.19  0.130 / 0.240
G15     270.6          12.2                4.8 +/-    0.94      12.8 +/-    0.94  0.150 / 0.230
G17     8.4            68.4                5.8 +/-    0.76       6.2 +/-    0.76  0.030 / 0.070
G19     284.6          70.8                4.6 +/-    0.63       4.9 +/-    0.63  0.030 / 0.030
G24     317.0          18.5                3.3 +/-    1.64       7.5 +/-    1.64  0.150 / 0.180
G28     73.4           46.0                5.1 +/-    1.05       6.8 +/-    1.05  0.150 / 0.220
G30     154.8          27.2                8.3 +/-    1.77      15.4 +/-    1.77  0.140 / 0.270