PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/18-17:27:50
G10     287.8          48.6                7.9 +/-    1.13      10.2 +/-    1.13  0.070 / 0.100
G15     48.4           36.6                6.2 +/-    0.61       9.6 +/-    0.61  0.070 / 0.110
G20     335.5          65.2                7.1 +/-    0.95       7.7 +/-    0.95  0.090 / 0.180
G21     75.6           75.7                9.7 +/-    0.86      10.0 +/-    0.86  0.070 / 0.180
G24     100.5          23.4                8.9 +/-    0.87      18.0 +/-    0.87  0.040 / 0.040
G27     308.9          29.2                7.9 +/-    1.78      14.1 +/-    1.78  0.040 / 0.050
G29     167.9          13.4               10.9 +/-    1.86      28.2 +/-    1.86  0.100 / 0.300
G32     208.0          24.9                8.9 +/-    1.64      17.4 +/-    1.64  0.080 / 0.270