PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-09:42:40
G01     128.9          10.1              -19.9 +/-   17.82     -55.3 +/-   17.82  0.030 / 0.040
G07     50.2           68.7                4.4 +/-    0.45       4.7 +/-    0.45  0.020 / 0.030
G08     51.7           39.9                3.6 +/-    0.78       5.3 +/-    0.78  0.040 / 0.050
G09     176.9          37.3                7.2 +/-    0.90      11.0 +/-    0.90  0.030 / 0.050
G11     119.0          32.8                7.2 +/-    0.92      12.0 +/-    0.92  0.060 / 0.080
G17     198.9          14.5                2.0 +/-    2.52       5.0 +/-    2.52  0.060 / 0.090
G23     161.2          11.7                2.8 +/-    2.05       7.6 +/-    2.05  0.190 / 0.460
G28     273.0          51.8                5.0 +/-    1.10       6.1 +/-    1.10  0.040 / 0.060
G30     328.8          57.2                2.9 +/-    0.53       3.4 +/-    0.53  0.040 / 0.060