PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-09:27:40
G08     286.5          21.3                6.7 +/-    1.58      14.2 +/-    1.58  0.080 / 0.090
G10     29.5           62.7                5.6 +/-    0.55       6.2 +/-    0.55  0.060 / 0.070
G14     239.4          51.1                6.7 +/-    1.20       8.3 +/-    1.20  0.030 / 0.030
G18     317.3          17.7                4.5 +/-    1.99      10.5 +/-    1.99  0.030 / 0.040
G20     94.6           18.6                4.8 +/-    1.37      10.9 +/-    1.37  0.100 / 0.120
G21     150.8          30.2                5.9 +/-    0.94      10.3 +/-    0.94  0.090 / 0.170
G24     47.9           20.3                2.8 +/-    0.74       6.1 +/-    0.74  0.070 / 0.160
G27     243.8          25.7                7.2 +/-    1.59      13.9 +/-    1.59  0.060 / 0.160
G31     180.2          17.0                5.2 +/-    4.04      12.4 +/-    4.04  0.070 / 0.240
G32     280.0          75.8                9.3 +/-    0.55       9.5 +/-    0.55  0.110 / 0.240