PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-08:57:40
G07     5.0            66.5                5.9 +/-    0.73       6.4 +/-    0.73  0.050 / 0.070
G08     68.2           49.2                5.9 +/-    0.56       7.5 +/-    0.56  0.070 / 0.060
G09     175.7          50.8               11.3 +/-    1.01      14.1 +/-    1.01  0.200 / 0.140
G11     133.0          24.6                9.3 +/-    1.99      18.3 +/-    1.99  0.190 / 0.220
G23     159.9          25.2                6.6 +/-    1.86      12.9 +/-    1.86  0.070 / 0.110
G27     43.3           21.8                3.5 +/-    2.05       7.4 +/-    2.05  0.100 / 0.110
G28     252.5          41.3               10.3 +/-    2.60      14.7 +/-    2.60  0.030 / 0.030
G30     314.5          45.5                6.1 +/-    0.75       8.2 +/-    0.75  0.020 / 0.040