PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-19:58:00
G01     56.6           29.2               11.2 +/-    1.81      19.9 +/-    1.81  0.070 / 0.050
G07     143.8          19.5               13.9 +/-    2.07      30.8 +/-    2.07  0.060 / 0.080
G11     47.2           21.8               10.6 +/-    2.21      22.4 +/-    2.21  0.040 / 0.050
G13     258.7          33.9               15.6 +/-    1.16      25.3 +/-    1.16  0.040 / 0.050
G15     291.1          16.2               11.6 +/-    1.31      28.1 +/-    1.31  0.240 / 0.360
G17     265.2          75.6               15.2 +/-    0.37      15.7 +/-    0.37  0.110 / 0.420
G18     40.5           10.9               10.4 +/-    1.41      28.4 +/-    1.41  0.040 / 0.050
G19     236.2          52.2               16.0 +/-    2.20      19.6 +/-    2.20  0.030 / 0.050
G28     41.7           55.4               12.3 +/-    1.29      14.5 +/-    1.29  0.100 / 0.250
G30     145.8          48.0               14.7 +/-    0.39      19.0 +/-    0.39  0.110 / 0.240