PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-03:57:40
G10     251.3          27.1               15.3 +/-    2.10      28.4 +/-    2.10  0.140 / 0.490
G13     52.9           29.6                8.8 +/-    0.81      15.6 +/-    0.81  0.150 / 0.570
G15     85.4           57.5               10.8 +/-    0.40      12.5 +/-    0.40  0.030 / 0.040
G16     294.0          15.6               11.0 +/-    2.83      27.0 +/-    2.83  0.030 / 0.050
G20     284.6          62.3               10.5 +/-    1.25      11.7 +/-    1.25  0.100 / 0.120
G21     333.9          60.3               11.2 +/-    0.40      12.7 +/-    0.40  0.100 / 0.140
G26     265.6          15.3               15.5 +/-    2.06      38.2 +/-    2.06  0.060 / 0.180
G29     165.4          49.8               11.3 +/-    0.89      14.3 +/-    0.89  0.060 / 0.180