PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-13:58:00
G10     298.4          51.9                4.5 +/-    0.97       5.5 +/-    0.97  0.060 / 0.090
G14     210.8          12.0                2.0 +/-    8.19       5.4 +/-    8.19  0.060 / 0.070
G15     45.7           25.7                3.7 +/-    1.15       7.0 +/-    1.15  0.030 / 0.040
G20     70.5           21.3                2.1 +/-    1.12       4.4 +/-    1.12  0.040 / 0.040
G21     104.7          70.4                3.9 +/-    0.42       4.1 +/-    0.42  0.070 / 0.200
G24     97.3           27.0                7.5 +/-    0.95      14.1 +/-    0.95  0.070 / 0.230
G27     298.0          35.3                3.5 +/-    1.13       5.5 +/-    1.13  0.030 / 0.040
G32     211.2          33.4                3.5 +/-    2.24       5.7 +/-    2.24  0.030 / 0.040