PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-16:58:10
G02     57.7           34.2               12.6 +/-    1.21      20.3 +/-    1.21  0.040 / 0.110
G05     66.3           66.3               13.9 +/-    0.56      15.0 +/-    0.56  0.050 / 0.090
G12     186.4          36.0               16.1 +/-    1.31      25.1 +/-    1.31  0.030 / 0.040
G13     131.8          13.2               16.4 +/-    2.58      42.6 +/-    2.58  0.030 / 0.030
G20     206.5          56.7               17.9 +/-    0.73      21.0 +/-    0.73  0.030 / 0.060
G21     269.7          17.6               14.9 +/-    4.51      34.7 +/-    4.51  0.040 / 0.060
G25     237.3          53.3               16.3 +/-    1.05      19.8 +/-    1.05  0.120 / 0.410
G29     331.0          57.0               12.3 +/-    0.71      14.4 +/-    0.71  0.160 / 0.400