PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-09:27:40
G01     128.4          10.4               -6.5 +/-   31.87     -18.0 +/-   31.87  0.250 / 0.370
G07     51.7           68.7                5.4 +/-    0.95       5.7 +/-    0.95  0.230 / 0.390
G08     51.2           39.5                3.7 +/-    1.26       5.4 +/-    1.26  0.030 / 0.020
G09     177.0          36.8                7.3 +/-    0.95      11.2 +/-    0.95  0.030 / 0.020
G11     118.5          33.2                5.6 +/-    1.24       9.2 +/-    1.24  0.030 / 0.030
G17     199.0          15.1                6.3 +/-    2.67      15.6 +/-    2.67  0.030 / 0.030
G23     161.2          11.1                4.4 +/-    2.39      11.9 +/-    2.39  0.060 / 0.060
G28     273.9          52.1                4.6 +/-    2.77       5.6 +/-    2.77  0.050 / 0.050
G30     329.6          57.8                3.6 +/-    0.41       4.2 +/-    0.41  0.130 / 0.270