PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/13-17:57:50
G10     293.8          50.8                8.7 +/-    1.06      10.9 +/-    1.06  0.060 / 0.080
G15     47.1           32.9                6.1 +/-    0.72      10.1 +/-    0.72  0.050 / 0.080
G20     346.0          65.4                7.7 +/-    0.93       8.4 +/-    0.93  0.040 / 0.040
G21     91.0           74.0               11.0 +/-    0.64      11.3 +/-    0.64  0.040 / 0.040
G24     96.2           25.1                9.3 +/-    1.77      18.1 +/-    1.77  0.070 / 0.130
G27     305.0          31.6                8.6 +/-    1.49      14.5 +/-    1.49  0.070 / 0.140
G32     209.4          29.2               10.5 +/-    1.75      18.7 +/-    1.75  0.050 / 0.080