PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/13-17:57:30
G10     293.8          50.8                8.9 +/-    2.58      11.1 +/-    2.58  0.040 / 0.030
G15     47.1           32.9                7.8 +/-    1.25      12.9 +/-    1.25  0.040 / 0.040
G20     346.0          65.4                9.1 +/-    0.49       9.9 +/-    0.49  0.090 / 0.120
G21     91.0           74.0               11.6 +/-    0.37      12.0 +/-    0.37  0.080 / 0.130
G24     96.2           25.1               11.5 +/-    1.45      22.4 +/-    1.45  0.070 / 0.100
G27     305.0          31.6                9.0 +/-    1.28      15.2 +/-    1.28  0.070 / 0.060
G32     209.4          29.2               11.5 +/-    1.70      20.4 +/-    1.70  0.070 / 0.090