PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-08:27:40
G07     28.3           69.1                5.4 +/-    0.63       5.7 +/-    0.63  0.050 / 0.050
G08     57.1           44.2                3.7 +/-    0.70       5.0 +/-    0.70  0.040 / 0.040
G09     174.7          40.7                7.3 +/-    1.11      10.5 +/-    1.11  0.030 / 0.040
G11     125.6          30.3                5.9 +/-    1.18      10.3 +/-    1.18  0.030 / 0.040
G18     110.2          12.2                2.9 +/-    2.69       7.8 +/-    2.69  0.100 / 0.260
G23     160.9          16.9                4.6 +/-    1.77      11.0 +/-    1.77  0.090 / 0.250
G27     39.6           15.3                2.2 +/-    0.91       5.5 +/-    0.91  0.070 / 0.210
G28     262.7          47.0                5.3 +/-    1.12       6.9 +/-    1.12  0.080 / 0.190
G30     322.0          52.1                4.9 +/-    1.68       6.0 +/-    1.68  0.120 / 0.360