PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-21:12:40
G10     263.6          36.3               10.7 +/-    1.53      16.6 +/-    1.53  0.130 / 0.390
G13     43.5           20.5                7.2 +/-    1.65      15.7 +/-    1.65  0.160 / 0.290
G15     68.7           55.9                9.8 +/-    0.64      11.5 +/-    0.64  0.040 / 0.050
G16     281.4          13.3                8.3 +/-    1.59      21.6 +/-    1.59  0.050 / 0.040
G20     291.3          58.8                9.6 +/-    0.99      11.1 +/-    0.99  0.100 / 0.290
G21     355.4          69.7               10.1 +/-    0.73      10.7 +/-    0.73  0.120 / 0.380
G24     120.8          12.6               12.4 +/-    2.16      32.6 +/-    2.16  0.070 / 0.230
G27     320.4          15.4                6.5 +/-    3.54      16.0 +/-    3.54  0.100 / 0.300
G29     167.7          35.3               11.9 +/-    1.45      18.7 +/-    1.45  0.080 / 0.080