PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-21:42:30
G10     290.9          49.6               10.3 +/-    0.67      13.0 +/-    0.67  0.070 / 0.080
G15     48.3           37.4                8.2 +/-    0.49      12.4 +/-    0.49  0.050 / 0.110
G20     340.9          65.4                8.9 +/-    0.92       9.7 +/-    0.92  0.040 / 0.040
G21     78.7           76.3               10.9 +/-    0.53      11.2 +/-    0.53  0.040 / 0.050
G24     99.8           24.4                9.7 +/-    1.44      19.2 +/-    1.44  0.060 / 0.160
G27     306.1          31.2                9.4 +/-    1.17      16.1 +/-    1.17  0.060 / 0.130
G29     168.5          12.3               11.5 +/-    2.63      30.4 +/-    2.63  0.040 / 0.060
G32     208.5          28.4               12.7 +/-    2.93      22.9 +/-    2.93  0.040 / 0.080