PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-08:57:20
G07     29.8           69.2                4.3 +/-    0.36       4.6 +/-    0.36  0.030 / 0.030
G08     56.5           43.9                4.2 +/-    1.32       5.7 +/-    1.32  0.030 / 0.030
G09     175.0          40.4                6.1 +/-    1.09       8.8 +/-    1.09  0.160 / 0.360
G11     125.1          30.7                5.9 +/-    1.27      10.2 +/-    1.27  0.120 / 0.180
G18     109.8          12.5                5.1 +/-    1.81      13.4 +/-    1.81  0.050 / 0.050
G23     160.9          16.2                4.4 +/-    1.41      10.6 +/-    1.41  0.030 / 0.040
G27     39.3           14.7                2.4 +/-    2.18       6.1 +/-    2.18  0.160 / 0.280
G28     263.5          47.4                5.2 +/-    3.69       6.8 +/-    3.69  0.140 / 0.350
G30     322.6          52.6                3.3 +/-    0.91       4.0 +/-    0.91  0.140 / 0.340