PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-21:12:40
G02     59.6           33.4                8.3 +/-    1.75      13.5 +/-    1.75  0.030 / 0.050
G05     56.6           60.2                8.6 +/-    0.64       9.8 +/-    0.64  0.030 / 0.040
G12     181.8          28.5                9.9 +/-    1.60      17.9 +/-    1.60  0.150 / 0.260
G13     127.0          16.0               10.1 +/-    2.73      24.4 +/-    2.73  0.130 / 0.240
G15     165.3          11.9               11.3 +/-    4.20      30.2 +/-    4.20  0.140 / 0.430
G21     271.9          17.2               12.1 +/-    2.39      28.6 +/-    2.39  0.110 / 0.320
G25     234.0          51.0               10.7 +/-    2.86      13.3 +/-    2.86  0.060 / 0.110
G29     328.1          54.4                8.9 +/-    1.11      10.7 +/-    1.11  0.080 / 0.110