PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-18:12:30
G02     204.1          29.3               16.9 +/-    3.01      30.0 +/-    3.01  0.090 / 0.140
G03     60.3           9.7                 8.0 +/-    2.29      22.6 +/-    2.29  0.080 / 0.120
G06     160.0          68.2               14.0 +/-    0.35      15.0 +/-    0.35  0.120 / 0.330
G12     307.7          15.8               11.8 +/-    1.33      28.7 +/-    1.33  0.100 / 0.230
G17     37.7           47.9               12.3 +/-    1.74      15.9 +/-    1.74  0.100 / 0.260
G19     4.6            64.9               12.9 +/-    0.84      14.1 +/-    0.84  0.140 / 0.290
G28     101.8          31.8               12.7 +/-    0.94      21.5 +/-    0.94  0.030 / 0.040