PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/24-10:27:50
G01     108.3          24.7                3.9 +/-    0.93       7.8 +/-    0.93  0.040 / 0.030
G07     105.7          57.2                5.4 +/-    0.38       6.3 +/-    0.38  0.040 / 0.040
G08     41.9           19.9                2.3 +/-    0.69       5.0 +/-    0.69  0.020 / 0.030
G09     174.0          13.6                4.8 +/-    2.27      12.4 +/-    2.27  0.020 / 0.030
G11     89.3           41.2                5.3 +/-    0.48       7.6 +/-    0.48  0.090 / 0.260
G13     312.1          25.9                4.1 +/-    1.09       7.8 +/-    1.09  0.110 / 0.220
G17     204.6          38.7                6.7 +/-    0.94      10.0 +/-    0.94  0.080 / 0.130
G19     208.4          13.2                3.5 +/-    1.40       9.0 +/-    1.40  0.060 / 0.130
G28     315.9          60.7                4.6 +/-    0.81       5.1 +/-    0.81  0.070 / 0.080
G30     12.2           76.5                5.0 +/-    0.44       5.1 +/-    0.44  0.090 / 0.070