PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-08:13:00
G07     47.1           69.4                6.7 +/-    0.60       7.2 +/-    0.60  0.030 / 0.050
G08     51.3           39.7                5.3 +/-    1.18       7.7 +/-    1.18  0.030 / 0.050
G09     174.1          33.7                8.9 +/-    1.20      14.4 +/-    1.20  0.200 / 0.320
G11     119.5          34.1                8.4 +/-    0.66      13.5 +/-    0.66  0.140 / 0.310
G17     198.9          13.9                2.0 +/-    2.16       5.1 +/-    2.16  0.030 / 0.040
G18     104.6          15.3                5.5 +/-    0.67      13.6 +/-    0.67  0.030 / 0.030
G23     161.1          11.2                3.1 +/-    1.13       8.4 +/-    1.13  0.200 / 0.270
G27     37.8           10.4                3.0 +/-    1.98       8.3 +/-    1.98  0.250 / 0.300
G28     271.0          50.6                5.5 +/-    0.90       6.8 +/-    0.90  0.100 / 0.230
G30     327.9          57.0                3.9 +/-    0.73       4.5 +/-    0.73  0.090 / 0.200