PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-21:12:50
G10     275.8          43.2                8.9 +/-    1.61      12.3 +/-    1.61  0.040 / 0.040
G13     38.9           12.0                6.9 +/-    4.06      18.5 +/-    4.06  0.040 / 0.040
G15     55.1           47.6                8.5 +/-    0.79      11.0 +/-    0.79  0.090 / 0.170
G20     313.5          63.2                8.3 +/-    0.79       9.2 +/-    0.79  0.060 / 0.120
G21     27.1           75.9                8.9 +/-    0.47       9.2 +/-    0.47  0.100 / 0.170
G24     111.1          18.8                9.4 +/-    1.01      21.3 +/-    1.01  0.120 / 0.200
G27     315.1          23.8                8.3 +/-    1.13      16.7 +/-    1.13  0.320 / 0.400
G29     168.6          23.7               10.5 +/-    1.72      21.1 +/-    1.72  0.310 / 0.430
G32     205.3          17.2               10.3 +/-    0.92      24.4 +/-    0.92  0.040 / 0.040