PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-18:57:40
G02     55.9           36.8                9.7 +/-    0.61      14.9 +/-    0.61  0.030 / 0.030
G05     62.8           63.9               10.2 +/-    0.35      11.2 +/-    0.35  0.030 / 0.030
G12     181.4          31.2               14.5 +/-    1.97      24.7 +/-    1.97  0.190 / 0.390
G13     129.6          13.6               14.9 +/-    1.72      38.3 +/-    1.72  0.180 / 0.430
G21     269.0          14.7               10.9 +/-    3.43      27.2 +/-    3.43  0.060 / 0.110
G25     238.4          53.5               10.8 +/-    0.96      13.1 +/-    0.96  0.050 / 0.130
G29     325.7          50.8                8.4 +/-    0.83      10.4 +/-    0.83  0.120 / 0.450