PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-14:57:40
G10     297.5          51.5                4.0 +/-    2.64       5.0 +/-    2.64  0.060 / 0.090
G14     210.6          11.8               -3.6 +/-   14.64      -9.6 +/-   14.64  0.060 / 0.070
G15     45.8           26.3                4.2 +/-    2.53       8.0 +/-    2.53  0.070 / 0.150
G18     5.3            65.5                4.2 +/-    0.52       4.6 +/-    0.52  0.100 / 0.220
G20     70.4           21.1                5.8 +/-    2.23      12.3 +/-    2.23  0.030 / 0.040
G21     104.2          70.1                5.8 +/-    0.77       6.1 +/-    0.77  0.030 / 0.030
G24     98.1           26.7                5.9 +/-    1.20      11.1 +/-    1.20  0.070 / 0.110
G27     298.7          35.1                4.3 +/-    1.15       6.7 +/-    1.15  0.060 / 0.140
G32     211.0          32.4                4.7 +/-    1.73       7.9 +/-    1.73  0.140 / 0.330