PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-23:42:40
G07     39.3           69.7                8.4 +/-    0.86       8.9 +/-    0.86  0.120 / 0.080
G08     55.3           44.5                9.1 +/-    0.41      12.3 +/-    0.41  0.120 / 0.060
G09     179.6          41.5                9.2 +/-    0.63      13.1 +/-    0.63  0.130 / 0.530
G11     125.5          32.1                8.7 +/-    0.91      14.7 +/-    0.91  0.050 / 0.220
G23     160.1          10.3                8.9 +/-    0.92      24.7 +/-    0.92  0.030 / 0.030
G27     37.6           9.7                 5.5 +/-    3.70      15.3 +/-    3.70  0.030 / 0.020
G28     271.0          51.2                9.2 +/-    3.43      11.4 +/-    3.43  0.200 / 0.230
G30     334.8          60.9                8.4 +/-    0.55       9.5 +/-    0.55  0.030 / 0.040