PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-18:27:30
G05     48.3           19.9               15.6 +/-    0.65      34.5 +/-    0.65  0.070 / 0.140
G10     235.8          11.0                1.8 +/-   55.07       4.9 +/-   55.07  0.080 / 0.140
G13     78.4           37.4               18.2 +/-    0.82      27.7 +/-    0.82  0.130 / 0.260
G15     124.2          51.8               21.3 +/-    0.71      26.3 +/-    0.71  0.140 / 0.320
G18     245.2          42.4               20.0 +/-    1.37      28.0 +/-    1.37  0.040 / 0.050
G20     26.1           67.7               18.6 +/-    0.40      19.9 +/-    0.40  0.050 / 0.060
G21     314.4          48.7               18.2 +/-    0.93      23.3 +/-    0.93  0.040 / 0.080
G25     198.3          10.3               19.0 +/-   20.34      52.8 +/-   20.34  0.040 / 0.080
G29     151.7          66.9               21.8 +/-    0.60      23.4 +/-    0.60  0.260 / 0.430