PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/12-08:27:50
G01     65.9           32.1                4.1 +/-    0.77       6.8 +/-    0.77  0.040 / 0.050
G07     139.6          26.1                7.9 +/-    1.45      15.0 +/-    1.45  0.050 / 0.050
G11     51.0           27.0                2.8 +/-    1.81       5.3 +/-    1.81  0.030 / 0.030
G13     271.1          36.3                4.9 +/-    1.49       7.5 +/-    1.49  0.030 / 0.070
G15     298.8          16.2                2.2 +/-    1.98       5.3 +/-    1.98  0.050 / 0.100
G17     244.9          74.4                7.2 +/-    0.73       7.4 +/-    0.73  0.040 / 0.100
G19     227.9          47.5                4.4 +/-    1.73       5.7 +/-    1.73  0.120 / 0.300
G28     28.0           57.9                3.4 +/-    0.45       3.9 +/-    0.45  0.080 / 0.280
G30     139.0          57.3                7.0 +/-    1.14       8.2 +/-    1.14  0.050 / 0.090