PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-07:27:50
G01     126.2          12.3                6.1 +/-    4.12      16.1 +/-    4.12  0.040 / 0.070
G07     59.0           68.5                4.7 +/-    0.65       5.0 +/-    0.65  0.040 / 0.070
G08     49.2           37.5                3.0 +/-    0.87       4.6 +/-    0.87  0.120 / 0.620
G09     177.5          34.6                7.9 +/-    1.23      12.6 +/-    1.23  0.110 / 0.560
G11     116.2          34.9                8.8 +/-    1.31      14.1 +/-    1.31  0.030 / 0.040
G13     321.5          10.8               -7.7 +/-    7.36     -21.0 +/-    7.36  0.040 / 0.040
G17     199.5          17.7                4.7 +/-    1.59      11.0 +/-    1.59  0.070 / 0.090
G28     278.7          53.8                5.7 +/-    0.77       6.9 +/-    0.77  0.070 / 0.090
G30     334.2          61.0                3.8 +/-    0.97       4.2 +/-    0.97  0.080 / 0.440