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                4.8 +/-    0.63       8.1 +/-    0.63  0.050 / 0.040
G07     139.6          26.1                7.6 +/-    0.84      14.4 +/-    0.84  0.060 / 0.050
G11     51.0           27.0                2.8 +/-    2.10       5.3 +/-    2.10  0.050 / 0.120
G13     271.1          36.3                5.0 +/-    1.46       7.7 +/-    1.46  0.060 / 0.100
G15     298.8          16.2                2.1 +/-    2.38       5.0 +/-    2.38  0.130 / 0.250
G17     244.9          74.4                8.0 +/-    0.33       8.3 +/-    0.33  0.120 / 0.220
G19     227.9          47.5                6.3 +/-    2.09       8.2 +/-    2.09  0.030 / 0.030
G28     28.0           57.9                6.2 +/-    1.95       7.1 +/-    1.95  0.030 / 0.030
G30     139.0          57.3                7.8 +/-    0.53       9.1 +/-    0.53  0.050 / 0.070