PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-19:58:10
G01     318.8          18.1                9.3 +/-    1.28      21.4 +/-    1.28  0.040 / 0.070
G08     257.1          13.0                7.3 +/-    4.35      19.0 +/-    4.35  0.040 / 0.060
G10     79.6           53.7                8.5 +/-    1.31      10.2 +/-    1.31  0.030 / 0.020
G11     303.3          23.0                8.6 +/-    1.07      17.6 +/-    1.07  0.030 / 0.020
G14     298.8          70.8                7.7 +/-    0.83       8.1 +/-    0.83  0.120 / 0.180
G18     102.7          27.4               10.4 +/-    1.23      19.2 +/-    1.23  0.130 / 0.180
G31     177.8          40.6               10.0 +/-    0.77      14.4 +/-    0.77  0.080 / 0.050
G32     5.3            67.8                7.9 +/-    0.42       8.5 +/-    0.42  0.070 / 0.050