PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-10:27:50
G01     40.8           15.7                2.7 +/-    1.59       6.6 +/-    1.59  0.040 / 0.060
G06     177.1          37.8                8.2 +/-    0.93      12.4 +/-    0.93  0.050 / 0.060
G13     238.7          21.6                6.2 +/-    1.53      13.0 +/-    1.53  0.130 / 0.300
G15     270.4          12.3                5.7 +/-    1.23      15.2 +/-    1.23  0.150 / 0.290
G17     8.0            68.5                5.8 +/-    0.63       6.2 +/-    0.63  0.150 / 0.160
G19     284.3          70.7                5.1 +/-    0.52       5.4 +/-    0.52  0.150 / 0.230
G24     317.0          18.5                3.5 +/-    1.76       8.0 +/-    1.76  0.040 / 0.030
G28     73.4           46.0                4.7 +/-    1.18       6.2 +/-    1.18  0.030 / 0.030
G30     154.7          26.9                6.5 +/-    1.96      12.1 +/-    1.96  0.150 / 0.260