PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-11:58:00
G01     59.0           30.0                3.7 +/-    0.52       6.6 +/-    0.52  0.040 / 0.050
G06     180.8          15.1                6.6 +/-    2.12      16.4 +/-    2.12  0.030 / 0.040
G07     142.5          19.4                4.8 +/-    0.70      10.7 +/-    0.70  0.110 / 0.190
G11     47.4           21.1                2.7 +/-    1.10       5.8 +/-    1.10  0.070 / 0.220
G13     263.8          34.5                7.9 +/-    1.33      12.6 +/-    1.33  0.030 / 0.030
G15     294.1          16.2                4.0 +/-    2.03       9.7 +/-    2.03  0.030 / 0.030
G17     272.1          79.0                6.0 +/-    0.77       6.1 +/-    0.77  0.060 / 0.080
G19     234.5          53.7                7.9 +/-    0.85       9.5 +/-    0.85  0.070 / 0.090
G28     38.2           56.1                3.4 +/-    0.42       4.0 +/-    0.42  0.070 / 0.290
G30     144.1          52.5                5.9 +/-    1.43       7.2 +/-    1.43  0.070 / 0.290