PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-21:57:20
G02     51.7           39.0                7.1 +/-    0.42      10.5 +/-    0.42  0.140 / 0.610
G05     74.9           67.0               10.0 +/-    0.56      10.8 +/-    0.56  0.150 / 0.720
G12     187.7          44.2                9.8 +/-    1.33      13.4 +/-    1.33  0.050 / 0.070
G21     264.3          11.2                6.6 +/-   20.53      18.0 +/-   20.53  0.040 / 0.060
G25     253.6          56.9                9.2 +/-    0.58      10.8 +/-    0.58  0.050 / 0.050
G29     323.6          47.4                9.6 +/-    0.92      12.5 +/-    0.92  0.050 / 0.050