PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/16-19:57:30
G02     33.7           55.3               13.7 +/-    1.04      16.3 +/-    1.04  0.050 / 0.050
G05     144.1          63.1               15.8 +/-    0.41      17.5 +/-    0.41  0.050 / 0.050
G06     55.8           13.6               11.2 +/-    3.14      28.9 +/-    3.14  0.050 / 0.050
G12     195.1          63.7               13.8 +/-    0.49      15.2 +/-    0.49  0.030 / 0.040
G20     198.2          30.5               15.7 +/-    2.15      27.2 +/-    2.15  0.030 / 0.030
G25     285.8          58.8                9.9 +/-    1.72      11.4 +/-    1.72  0.030 / 0.030
G29     310.7          32.4               11.9 +/-    1.33      19.8 +/-    1.33  0.070 / 0.110