PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/20-16:27:40
G02     27.6           59.2                6.4 +/-    0.67       7.3 +/-    0.67  0.030 / 0.040
G05     146.8          60.2                7.5 +/-    0.27       8.5 +/-    0.27  0.030 / 0.040
G06     53.5           15.5                5.7 +/-    0.82      14.0 +/-    0.82  0.020 / 0.050
G12     193.3          66.8                4.6 +/-    2.03       4.9 +/-    2.03  0.030 / 0.040
G19     97.8           14.0                8.6 +/-    1.79      22.0 +/-    1.79  0.160 / 0.330
G25     295.7          54.9                6.1 +/-    2.28       7.3 +/-    2.28  0.160 / 0.400
G29     306.4          26.7                4.1 +/-    1.87       7.6 +/-    1.87  0.030 / 0.060