PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-21:12:40
G02     65.3           29.1               13.6 +/-    0.82      24.3 +/-    0.82  0.050 / 0.080
G05     51.7           58.5               15.5 +/-    0.88      17.8 +/-    0.88  0.050 / 0.070
G12     183.2          23.4               23.4 +/-    3.34      47.4 +/-    3.34  0.070 / 0.270
G13     123.2          20.8               19.2 +/-    1.30      41.5 +/-    1.30  0.070 / 0.220
G15     160.4          17.8               23.8 +/-    2.55      55.3 +/-    2.55  0.110 / 0.160
G20     212.8          70.6               20.7 +/-    0.96      21.8 +/-    0.96  0.060 / 0.180
G21     277.8          22.7               20.5 +/-    1.08      42.3 +/-    1.08  0.030 / 0.050
G25     220.2          43.7               23.8 +/-    0.73      32.7 +/-    0.73  0.030 / 0.040
G29     336.6          65.3               20.3 +/-    0.99      22.1 +/-    0.99  0.030 / 0.040