PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-22:27:40
G02     63.3           30.2                9.8 +/-    0.45      17.1 +/-    0.45  0.040 / 0.050
G05     51.8           56.0               10.1 +/-    0.54      11.9 +/-    0.54  0.030 / 0.040
G12     181.6          24.7               13.6 +/-    2.11      26.7 +/-    2.11  0.100 / 0.190
G13     123.6          18.9               13.5 +/-    2.66      30.4 +/-    2.66  0.060 / 0.190
G15     162.6          15.5               17.2 +/-    2.23      42.3 +/-    2.23  0.150 / 0.130
G21     275.4          19.8               12.4 +/-    2.57      27.3 +/-    2.57  0.090 / 0.110
G25     229.0          47.7               13.5 +/-    0.84      17.6 +/-    0.84  0.190 / 0.340
G29     330.9          58.7               11.0 +/-    0.70      12.7 +/-    0.70  0.130 / 0.390