PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-00:43:10
G10     276.8          43.5               10.9 +/-    1.67      15.0 +/-    1.67  0.090 / 0.120
G13     38.7           11.4                9.3 +/-    2.44      25.2 +/-    2.44  0.080 / 0.120
G15     53.1           44.5                8.6 +/-    0.63      11.6 +/-    0.63  0.050 / 0.040
G20     284.3          46.3                8.2 +/-    0.83      10.9 +/-    0.83  0.040 / 0.040
G21     25.9           76.2                9.7 +/-    0.95      10.0 +/-    0.95  0.100 / 0.190
G24     111.5          19.2                9.7 +/-    1.51      21.7 +/-    1.51  0.120 / 0.200
G27     314.0          25.1                9.4 +/-    1.88      18.3 +/-    1.88  0.240 / 0.420
G29     169.0          23.3               10.6 +/-    2.03      21.5 +/-    2.03  0.240 / 0.360
G32     205.3          18.7               11.5 +/-    3.38      26.2 +/-    3.38  0.030 / 0.050