PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/26-04:12:30
G10     249.2          25.4               11.5 +/-    0.79      22.3 +/-    0.79  0.100 / 0.270
G13     55.2           31.0                6.4 +/-    1.37      11.0 +/-    1.37  0.110 / 0.330
G15     90.2           57.8                9.0 +/-    1.06      10.4 +/-    1.06  0.040 / 0.130
G16     296.5          15.7                7.0 +/-    1.00      17.1 +/-    1.00  0.040 / 0.030
G20     284.0          63.4                8.3 +/-    0.27       9.2 +/-    0.27  0.130 / 0.160
G21     331.0          58.7                7.6 +/-    0.91       8.7 +/-    0.91  0.130 / 0.110
G26     268.0          16.3               10.6 +/-    1.29      25.4 +/-    1.29  0.040 / 0.030
G29     164.7          52.5                9.9 +/-    0.67      12.1 +/-    0.67  0.030 / 0.030