PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-08:42:40
G01     48.5           24.1                2.1 +/-    3.12       4.1 +/-    3.12  0.040 / 0.070
G06     180.0          24.3                4.6 +/-    3.14       9.2 +/-    3.14  0.050 / 0.080
G11     44.2           12.9                1.3 +/-    4.21       3.4 +/-    4.21  0.020 / 0.030
G13     250.0          29.2                4.3 +/-    3.13       7.7 +/-    3.13  0.020 / 0.030
G15     281.5          15.6                3.6 +/-    3.01       8.7 +/-    3.01  0.160 / 0.330
G17     333.0          77.6                4.6 +/-    1.84       4.7 +/-    1.84  0.120 / 0.360
G19     252.0          63.2                3.5 +/-    3.46       3.9 +/-    3.46  0.050 / 0.110
G28     56.5           51.6                2.9 +/-    1.93       3.5 +/-    1.93  0.050 / 0.090
G30     150.3          38.7                7.0 +/-    2.52      10.5 +/-    2.52  0.140 / 0.200