PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/11-08:27:50
G01     128.0          10.8               -4.1 +/-   37.55     -11.2 +/-   37.55  0.160 / 0.360
G07     52.6           68.8                5.0 +/-    0.41       5.3 +/-    0.41  0.220 / 0.310
G08     50.8           39.2                3.9 +/-    1.15       5.7 +/-    1.15  0.030 / 0.030
G09     177.3          36.7                8.5 +/-    0.94      13.1 +/-    0.94  0.030 / 0.040
G11     118.3          33.6                7.4 +/-    0.51      12.0 +/-    0.51  0.050 / 0.070
G17     199.1          15.5                5.0 +/-    3.51      12.2 +/-    3.51  0.050 / 0.070
G23     161.2          10.5                4.6 +/-    4.14      12.8 +/-    4.14  0.180 / 0.220
G28     274.9          52.5                5.8 +/-    0.81       7.1 +/-    0.81  0.130 / 0.130
G30     330.7          58.6                3.1 +/-    0.71       3.6 +/-    0.71  0.060 / 0.080