PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/20-16:28:00
G02     27.6           59.2                7.5 +/-    1.20       8.6 +/-    1.20  0.020 / 0.030
G05     146.8          60.2                9.1 +/-    0.65      10.3 +/-    0.65  0.020 / 0.030
G06     53.5           15.5                5.7 +/-    2.41      13.9 +/-    2.41  0.040 / 0.030
G12     193.3          66.8                6.6 +/-    0.69       7.2 +/-    0.69  0.020 / 0.030
G19     97.8           14.0                7.2 +/-    1.74      18.4 +/-    1.74  0.080 / 0.050
G25     295.7          54.9                6.7 +/-    5.12       8.0 +/-    5.12  0.050 / 0.050
G29     306.4          26.7                5.9 +/-    2.21      11.2 +/-    2.21  0.180 / 0.220