PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-18:27:50
G02     62.8           30.3               15.6 +/-    2.24      27.1 +/-    2.24  0.070 / 0.090
G05     55.9           61.7               24.7 +/-    0.56      27.7 +/-    0.56  0.090 / 0.090
G12     184.7          28.5               15.9 +/-    1.05      28.8 +/-    1.05  0.070 / 0.090
G13     126.7          17.9               16.8 +/-    2.27      38.9 +/-    2.27  0.060 / 0.110
G15     161.6          15.1               15.8 +/-    2.54      39.2 +/-    2.54  0.130 / 0.250
G20     210.1          64.9               25.6 +/-    0.40      27.9 +/-    0.40  0.200 / 0.340
G21     274.9          21.2               17.2 +/-    1.76      36.9 +/-    1.76  0.030 / 0.050
G25     227.0          47.9               17.3 +/-    2.62      22.4 +/-    2.62  0.030 / 0.040
G29     335.4          62.7               21.7 +/-    0.44      24.1 +/-    0.44  0.040 / 0.030