PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-12:28:10
G02     215.3          60.3                8.2 +/-    0.56       9.3 +/-    0.56  0.160 / 0.470
G06     63.7           77.6                5.3 +/-    0.87       5.4 +/-    0.87  0.090 / 0.440
G12     318.3          34.7                4.4 +/-    1.94       6.9 +/-    1.94  0.100 / 0.110
G17     58.7           30.8                4.4 +/-    0.62       7.5 +/-    0.62  0.120 / 0.110
G19     41.3           48.0                4.8 +/-    0.63       6.2 +/-    0.63  0.050 / 0.070
G24     268.0          41.4                5.3 +/-    1.06       7.5 +/-    1.06  0.080 / 0.090
G28     122.9          13.1                5.8 +/-    1.33      15.2 +/-    1.33  0.070 / 0.090