PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-08:28:00
G01     320.0          15.2               -5.1 +/-   27.97     -12.7 +/-   27.97  0.050 / 0.060
G08     262.6          14.7                6.1 +/-    2.11      15.4 +/-    2.11  0.040 / 0.050
G10     74.6           55.0                4.2 +/-    0.43       5.0 +/-    0.43  0.170 / 0.420
G11     306.6          20.8                5.5 +/-    3.73      11.8 +/-    3.73  0.180 / 0.420
G14     277.8          66.4                4.8 +/-    0.56       5.2 +/-    0.56  0.130 / 0.260
G18     307.8          37.2                4.8 +/-    1.21       7.3 +/-    1.21  0.190 / 0.240
G20     107.3          17.1                4.4 +/-    1.68      10.3 +/-    1.68  0.040 / 0.030
G27     226.0          10.6                5.1 +/-    3.11      14.1 +/-    3.11  0.040 / 0.030
G31     174.8          40.4                5.8 +/-    0.69       8.4 +/-    0.69  0.110 / 0.230
G32     5.5            68.6                5.9 +/-    0.39       6.2 +/-    0.39  0.100 / 0.230