PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-21:27:50
G02     89.3           10.6                9.0 +/-    1.82      24.9 +/-    1.82  0.280 / 0.160
G05     46.1           25.4                7.5 +/-    2.47      14.5 +/-    2.47  0.170 / 0.200
G13     88.0           35.6               10.3 +/-    1.46      16.2 +/-    1.46  0.080 / 0.090
G15     141.5          44.1               10.6 +/-    0.68      14.4 +/-    0.68  0.070 / 0.100
G20     235.7          -0.2               12.5 +/-    2.18      39.1 +/-    2.18  0.470 / 0.640
G21     303.6          40.0               10.3 +/-    1.43      15.0 +/-    1.43  0.180 / 0.370
G25     203.6          18.2                9.6 +/-    7.01      22.0 +/-    7.01  0.080 / 0.110
G26     295.7          20.9                9.9 +/-    1.83      21.2 +/-    1.83  0.090 / 0.100
G29     137.0          84.7                8.4 +/-    0.39       8.4 +/-    0.39  0.030 / 0.060