PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/09-08:57:50
G01     120.2          17.0                4.1 +/-    0.74       9.7 +/-    0.74  0.080 / 0.110
G07     79.7           65.7                6.0 +/-    0.32       6.5 +/-    0.32  0.090 / 0.130
G08     45.1           31.2                3.4 +/-    0.31       5.9 +/-    0.31  0.020 / 0.040
G09     176.3          26.4                6.8 +/-    1.73      12.8 +/-    1.73  0.020 / 0.030
G11     107.0          38.3                6.6 +/-    0.53       9.8 +/-    0.53  0.050 / 0.050
G13     319.2          16.6                2.0 +/-    2.36       4.7 +/-    2.36  0.040 / 0.060
G17     200.7          25.3                6.1 +/-    0.66      11.9 +/-    0.66  0.050 / 0.150
G28     291.2          57.0                5.1 +/-    0.67       5.9 +/-    0.67  0.070 / 0.150
G30     343.3          66.7                3.7 +/-    0.66       4.0 +/-    0.66  0.110 / 0.240