PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-21:57:40
G05     47.7           20.1                6.8 +/-    0.66      14.9 +/-    0.66  0.070 / 0.170
G13     80.1           36.3               10.3 +/-    0.96      16.0 +/-    0.96  0.100 / 0.160
G15     134.5          49.2               13.2 +/-    1.29      16.7 +/-    1.29  0.060 / 0.090
G16     315.7          12.2                8.9 +/-    2.79      23.7 +/-    2.79  0.050 / 0.080
G20     239.3          6.1                 7.2 +/-    0.94      21.7 +/-    0.94  0.130 / 0.430
G21     309.1          43.9               10.3 +/-    1.34      14.1 +/-    1.34  0.130 / 0.510
G25     200.5          13.3               12.4 +/-    3.64      32.1 +/-    3.64  0.130 / 0.470
G26     289.4          21.1               11.3 +/-    2.02      24.2 +/-    2.02  0.120 / 0.430
G29     152.7          77.8               11.2 +/-    0.71      11.5 +/-    0.71  0.050 / 0.120