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                5.5 +/-    1.03       6.8 +/-    1.03  0.070 / 0.090
G14     210.6          11.8                2.4 +/-   19.63       6.6 +/-   19.63  0.090 / 0.090
G15     45.8           26.3                5.1 +/-    0.92       9.7 +/-    0.92  0.070 / 0.140
G18     5.3            65.5                3.9 +/-    1.18       4.2 +/-    1.18  0.070 / 0.140
G20     70.4           21.1                3.7 +/-    1.24       8.0 +/-    1.24  0.070 / 0.220
G21     104.2          70.1                5.6 +/-    1.03       5.9 +/-    1.03  0.070 / 0.240
G24     98.1           26.7                8.9 +/-    0.71      16.6 +/-    0.71  0.040 / 0.040
G27     298.7          35.1                5.1 +/-    1.23       8.2 +/-    1.23  0.040 / 0.040
G32     211.0          32.4                3.7 +/-    0.53       6.2 +/-    0.53  0.110 / 0.080