PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-20:27:50
G10     275.9          43.2                9.1 +/-    1.82      12.6 +/-    1.82  0.040 / 0.040
G13     38.9           11.9                9.1 +/-    3.46      24.3 +/-    3.46  0.040 / 0.030
G15     54.7           46.9                9.7 +/-    0.99      12.7 +/-    0.99  0.070 / 0.100
G20     313.6          63.2                9.6 +/-    0.80      10.6 +/-    0.80  0.070 / 0.150
G21     28.4           75.9               10.2 +/-    0.69      10.5 +/-    0.69  0.100 / 0.190
G24     110.9          18.8               10.8 +/-    1.44      24.5 +/-    1.44  0.130 / 0.180
G27     315.2          23.6                9.1 +/-    1.42      18.3 +/-    1.42  0.340 / 0.430
G29     168.5          23.5               11.1 +/-    1.22      22.6 +/-    1.22  0.370 / 0.560
G32     205.3          17.0               11.2 +/-    2.23      26.6 +/-    2.23  0.030 / 0.070