PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-14:13:10
G01     320.5          12.9                3.8 +/-    1.75       9.9 +/-    1.75  0.150 / 0.520
G08     265.7          15.8                7.3 +/-    2.57      17.7 +/-    2.57  0.140 / 0.420
G10     69.7           56.6                3.7 +/-    0.96       4.3 +/-    0.96  0.070 / 0.080
G11     310.2          17.7                4.5 +/-    1.73      10.4 +/-    1.73  0.050 / 0.090
G14     276.0          67.2                5.2 +/-    0.56       5.6 +/-    0.56  0.040 / 0.050
G27     227.4          12.2                5.8 +/-    6.94      15.3 +/-    6.94  0.040 / 0.050
G31     176.6          36.5                8.8 +/-    1.06      13.6 +/-    1.06  0.030 / 0.030
G32     356.8          70.9                5.5 +/-    0.72       5.8 +/-    0.72  0.030 / 0.030