PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-18:43:10
G02     72.9           22.1               16.2 +/-    1.19      33.8 +/-    1.19  0.070 / 0.100
G05     46.3           49.6               17.7 +/-    1.03      22.4 +/-    1.03  0.070 / 0.120
G12     182.0          16.2               34.7 +/-    4.51      83.7 +/-    4.51  0.100 / 0.120
G13     115.8          26.2               19.3 +/-    2.98      36.8 +/-    2.98  0.060 / 0.140
G15     154.4          25.7               29.2 +/-    2.12      56.3 +/-    2.12  0.110 / 0.280
G18     223.7          15.6               33.9 +/-    2.04      83.1 +/-    2.04  0.140 / 0.370
G20     225.8          78.5               25.0 +/-    0.99      25.5 +/-    0.99  0.030 / 0.040
G21     285.5          28.8               27.1 +/-    1.05      48.7 +/-    1.05  0.030 / 0.040
G25     215.5          36.9               29.4 +/-    2.18      45.1 +/-    2.18  0.040 / 0.040
G29     349.8          75.6               25.3 +/-    0.60      26.0 +/-    0.60  0.040 / 0.030