PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-20:58:10
G02     24.4           62.1                9.7 +/-    1.05      10.8 +/-    1.05  0.050 / 0.050
G05     151.9          56.5               11.8 +/-    0.63      13.9 +/-    0.63  0.040 / 0.050
G06     51.9           18.7                8.1 +/-    2.42      18.3 +/-    2.42  0.020 / 0.030
G12     202.8          71.4               10.6 +/-    0.35      11.1 +/-    0.35  0.020 / 0.030
G19     97.7           10.6               11.1 +/-    1.56      30.5 +/-    1.56  0.040 / 0.040
G20     197.3          23.3               15.6 +/-    1.91      31.8 +/-    1.91  0.040 / 0.070
G25     298.3          55.0               10.2 +/-    1.64      12.1 +/-    1.64  0.030 / 0.040
G29     305.1          26.2                9.8 +/-    2.23      18.5 +/-    2.23  0.030 / 0.030