PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-15:57:50
G10     293.1          50.6                7.7 +/-    0.94       9.7 +/-    0.94  0.030 / 0.040
G15     47.0           32.3                4.6 +/-    0.94       7.7 +/-    0.94  0.040 / 0.040
G20     344.8          65.4                6.4 +/-    0.65       6.9 +/-    0.65  0.040 / 0.040
G21     92.0           73.2                8.8 +/-    0.93       9.2 +/-    0.93  0.040 / 0.040
G24     96.3           24.8                8.4 +/-    1.60      16.4 +/-    1.60  0.060 / 0.140
G27     305.9          31.0                6.6 +/-    1.15      11.3 +/-    1.15  0.070 / 0.130
G32     209.3          27.9                8.5 +/-    3.19      15.5 +/-    3.19  0.050 / 0.080