PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/23-18:12:30
G10     256.4          31.6                9.7 +/-    1.94      16.4 +/-    1.94  0.130 / 0.390
G13     48.0           25.6               10.8 +/-    2.89      20.9 +/-    2.89  0.110 / 0.390
G15     78.7           57.8               10.4 +/-    1.36      12.0 +/-    1.36  0.040 / 0.040
G16     289.3          14.8                4.6 +/-    2.85      11.6 +/-    2.85  0.040 / 0.040
G20     279.3          54.9                9.7 +/-    3.76      11.6 +/-    3.76  0.110 / 0.230
G21     344.9          65.4               -2.6 +/-    0.97      -2.9 +/-    0.97  0.130 / 0.190
G26     262.6          12.8                8.0 +/-    1.76      21.0 +/-    1.76  0.040 / 0.040
G29     165.9          42.5               10.7 +/-    0.96      14.9 +/-    0.96  0.040 / 0.050