PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/22-18:42:50
G10     244.2          20.1               15.3 +/-    1.45      33.7 +/-    1.45  0.050 / 0.060
G13     63.0           34.9               12.6 +/-    0.43      20.0 +/-    0.43  0.050 / 0.060
G15     101.9          57.0               15.3 +/-    0.81      17.9 +/-    0.81  0.060 / 0.070
G16     308.4          12.7               13.1 +/-    1.47      34.5 +/-    1.47  0.050 / 0.070
G18     258.7          51.6               15.4 +/-    1.19      19.0 +/-    1.19  0.100 / 0.180
G20     36.3           56.3               12.6 +/-    0.44      14.8 +/-    0.44  0.120 / 0.250
G21     327.5          56.8               13.2 +/-    0.67      15.5 +/-    0.67  0.120 / 0.390
G26     280.8          17.4               12.5 +/-    1.08      29.3 +/-    1.08  0.110 / 0.360
G29     159.1          52.9               16.8 +/-    1.61      20.4 +/-    1.61  0.050 / 0.130