PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-16:12:40
G02     66.3           26.8                9.7 +/-    1.04      18.3 +/-    1.04  0.030 / 0.040
G05     51.1           56.5               10.1 +/-    0.54      11.8 +/-    0.54  0.030 / 0.040
G12     184.4          25.4               14.4 +/-    1.49      28.0 +/-    1.49  0.040 / 0.100
G13     123.5          20.3               14.5 +/-    1.28      31.6 +/-    1.28  0.040 / 0.130
G15     158.9          18.5               15.6 +/-    1.60      35.7 +/-    1.60  0.070 / 0.170
G20     213.8          67.7               14.2 +/-    1.17      15.2 +/-    1.17  0.070 / 0.230
G21     278.6          24.6               10.9 +/-    1.69      21.4 +/-    1.69  0.030 / 0.050
G25     224.8          45.3               14.1 +/-    1.48      18.9 +/-    1.48  0.030 / 0.050
G29     341.7          68.0               10.6 +/-    0.56      11.4 +/-    0.56  0.060 / 0.070