PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/08-23:28:00
G07     353.4          64.1                9.1 +/-    0.52      10.0 +/-    0.52  0.050 / 0.110
G08     80.2           53.0                9.0 +/-    0.92      10.9 +/-    0.92  0.080 / 0.110
G09     183.8          61.3               10.1 +/-    0.32      11.3 +/-    0.32  0.120 / 0.140
G11     139.7          20.2               11.6 +/-    1.96      25.3 +/-    1.96  0.070 / 0.130
G23     158.4          28.1               11.4 +/-    1.46      20.8 +/-    1.46  0.040 / 0.040
G27     45.0           23.5                6.3 +/-    1.99      12.7 +/-    1.99  0.050 / 0.040
G28     248.8          39.5                9.2 +/-    1.76      13.4 +/-    1.76  0.030 / 0.070
G30     315.3          47.1                8.3 +/-    0.90      10.8 +/-    0.90  0.040 / 0.070