PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/14-21:12:30
G07     356.6          64.9               19.6 +/-    0.71      21.4 +/-    0.71  0.150 / 0.140
G08     79.3           53.6               20.9 +/-    0.58      25.2 +/-    0.58  0.220 / 0.140
G09     183.0          59.2               23.4 +/-    0.58      26.8 +/-    0.58  0.060 / 0.090
G11     138.8          21.4               21.4 +/-    3.16      45.5 +/-    3.16  0.050 / 0.080
G23     158.2          24.8               20.9 +/-    1.79      41.0 +/-    1.79  0.030 / 0.040
G27     43.9           22.3               15.9 +/-    2.07      33.2 +/-    2.07  0.030 / 0.040
G28     250.6          40.7               22.1 +/-    1.47      31.7 +/-    1.47  0.030 / 0.030
G30     316.1          47.5               18.9 +/-    0.80      24.6 +/-    0.80  0.040 / 0.040