PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-16:58:00
G01     120.0          17.3               11.9 +/-    0.79      27.9 +/-    0.79  0.040 / 0.070
G07     77.3           67.3               10.6 +/-    0.16      11.4 +/-    0.16  0.040 / 0.070
G08     45.9           33.9               10.4 +/-    0.41      16.8 +/-    0.41  0.020 / 0.070
G09     177.0          26.8               12.9 +/-    2.68      24.3 +/-    2.68  0.030 / 0.060
G11     108.8          39.6               11.4 +/-    1.13      16.7 +/-    1.13  0.030 / 0.040
G13     318.2          18.6               12.3 +/-    1.39      28.1 +/-    1.39  0.030 / 0.030
G17     202.2          21.4               13.3 +/-    1.56      28.4 +/-    1.56  0.040 / 0.060
G18     95.6           20.5               11.0 +/-    0.96      24.0 +/-    0.96  0.040 / 0.070
G28     291.2          57.0               12.2 +/-    0.94      14.3 +/-    0.94  0.070 / 0.180
G30     345.9          68.1               10.4 +/-    0.50      11.1 +/-    0.50  0.060 / 0.150