PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-09:27:50
G08     269.2          17.2                6.2 +/-    2.15      14.6 +/-    2.15  0.050 / 0.060
G10     63.7           57.9                5.0 +/-    0.70       5.8 +/-    0.70  0.040 / 0.060
G11     311.5          17.0               -3.7 +/-    8.93      -8.8 +/-    8.93  0.090 / 0.310
G14     264.4          63.1                5.3 +/-    1.17       5.9 +/-    1.17  0.130 / 0.250
G18     312.0          32.1                3.5 +/-    0.98       5.9 +/-    0.98  0.190 / 0.340
G20     105.6          12.2                4.4 +/-    2.19      11.8 +/-    2.19  0.250 / 0.340
G21     155.0          14.1                6.5 +/-    1.51      16.5 +/-    1.51  0.170 / 0.270
G27     230.3          14.7                6.6 +/-    2.15      16.6 +/-    2.15  0.180 / 0.260
G31     176.4          33.7                4.1 +/-    1.75       6.7 +/-    1.75  0.140 / 0.160
G32     350.1          72.8                5.2 +/-    0.74       5.4 +/-    0.74  0.140 / 0.240