PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-00:28:00
G07     352.5          63.9                7.3 +/-    0.45       8.0 +/-    0.45  0.040 / 0.150
G08     80.3           52.7                7.4 +/-    1.48       9.0 +/-    1.48  0.040 / 0.110
G09     183.9          61.9                8.6 +/-    0.48       9.6 +/-    0.48  0.030 / 0.040
G11     139.6          19.9               10.9 +/-    1.18      24.0 +/-    1.18  0.030 / 0.030
G23     158.4          29.2                9.8 +/-    1.79      17.5 +/-    1.79  0.070 / 0.110
G27     45.3           23.8                4.6 +/-    2.11       9.2 +/-    2.11  0.080 / 0.140
G28     248.2          39.1                8.9 +/-    0.87      13.1 +/-    0.87  0.030 / 0.030
G30     314.1          46.0                7.5 +/-    0.95      10.0 +/-    0.95  0.030 / 0.040