PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/22-17:27:50
G02     81.0           15.2               11.7 +/-    1.40      28.8 +/-    1.40  0.030 / 0.060
G05     44.5           38.8               11.3 +/-    0.35      16.8 +/-    0.35  0.040 / 0.070
G13     105.3          31.8               14.2 +/-    0.78      24.0 +/-    0.78  0.040 / 0.060
G15     147.1          34.7               16.2 +/-    1.17      25.9 +/-    1.17  0.040 / 0.080
G18     228.9          24.7               17.1 +/-    1.53      33.7 +/-    1.53  0.050 / 0.130
G20     290.9          85.4               13.8 +/-    0.67      13.9 +/-    0.67  0.050 / 0.120
G21     294.7          35.6               13.5 +/-    0.94      21.2 +/-    0.94  0.090 / 0.220
G25     209.8          28.3               14.8 +/-    2.01      26.9 +/-    2.01  0.100 / 0.300
G26     313.0          14.1               10.2 +/-    2.32      26.0 +/-    2.32  0.080 / 0.160
G29     48.4           84.9               15.3 +/-    0.48      15.4 +/-    0.48  0.090 / 0.170