PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-15:42:40
G02     55.7           35.6                8.5 +/-    0.74      13.3 +/-    0.74  0.030 / 0.040
G05     71.5           67.4               10.6 +/-    0.30      11.4 +/-    0.30  0.030 / 0.040
G12     187.3          39.4               13.2 +/-    2.15      19.4 +/-    2.15  0.070 / 0.070
G13     133.8          11.3               15.1 +/-   12.89      41.0 +/-   12.89  0.080 / 0.080
G20     205.5          53.0               13.3 +/-    1.20      16.2 +/-    1.20  0.140 / 0.420
G21     267.8          16.5               10.6 +/-    2.20      25.4 +/-    2.20  0.160 / 0.550
G25     243.1          55.1               12.9 +/-    0.56      15.3 +/-    0.56  0.040 / 0.060
G29     329.7          55.2               10.2 +/-    0.91      12.1 +/-    0.91  0.040 / 0.060