PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-13:27:50
G01     73.8           33.0                6.6 +/-    0.82      10.9 +/-    0.82  0.050 / 0.100
G07     135.7          30.7                7.8 +/-    0.63      13.4 +/-    0.63  0.040 / 0.100
G11     54.7           30.2                5.8 +/-    1.12      10.2 +/-    1.12  0.090 / 0.250
G13     280.5          36.9                7.6 +/-    0.74      11.7 +/-    0.74  0.120 / 0.270
G15     306.9          13.8                4.2 +/-    1.20      10.9 +/-    1.20  0.030 / 0.030
G17     229.9          69.4                6.7 +/-    0.71       7.1 +/-    0.71  0.030 / 0.040
G19     222.3          41.5                8.5 +/-    1.17      12.0 +/-    1.17  0.030 / 0.040
G28     15.2           59.7                5.9 +/-    0.74       6.7 +/-    0.74  0.030 / 0.040
G30     131.0          66.4                6.8 +/-    0.81       7.3 +/-    0.81  0.090 / 0.190