PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/29-16:12:30
G07     7.8            67.1               17.2 +/-    0.53      18.5 +/-    0.53  0.050 / 0.040
G08     68.9           50.8               18.1 +/-    0.68      22.7 +/-    0.68  0.040 / 0.040
G09     180.1          52.5               19.7 +/-    1.14      24.2 +/-    1.14  0.030 / 0.040
G11     133.0          25.5               19.6 +/-    2.27      37.9 +/-    2.27  0.030 / 0.040
G23     158.5          18.8               18.2 +/-    1.16      41.1 +/-    1.16  0.050 / 0.050
G27     41.6           19.0               13.5 +/-    2.59      30.3 +/-    2.59  0.040 / 0.050
G28     255.9          43.8               19.9 +/-    3.27      27.3 +/-    3.27  0.090 / 0.180
G30     318.2          48.9               16.0 +/-    0.56      20.4 +/-    0.56  0.090 / 0.170