PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-17:42:40
G02     81.9           14.6               15.2 +/-    1.08      38.3 +/-    1.08  0.030 / 0.060
G05     44.5           37.8               13.5 +/-    0.66      20.4 +/-    0.66  0.050 / 0.070
G13     104.0          32.4               17.8 +/-    0.71      29.8 +/-    0.71  0.040 / 0.050
G15     146.3          35.7               19.6 +/-    1.10      30.8 +/-    1.10  0.050 / 0.060
G18     229.7          25.7               19.6 +/-    2.78      37.6 +/-    2.78  0.050 / 0.110
G20     309.4          85.4               15.1 +/-    0.51      15.2 +/-    0.51  0.050 / 0.130
G21     295.6          36.2               14.0 +/-    0.68      21.7 +/-    0.68  0.070 / 0.160
G25     209.0          27.2               18.6 +/-    3.38      34.7 +/-    3.38  0.080 / 0.190
G29     62.1           85.2               15.7 +/-    1.20      15.7 +/-    1.20  0.050 / 0.120