PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-17:58:00
G01     105.0          26.7               12.2 +/-    1.41      23.0 +/-    1.41  0.150 / 0.170
G07     109.8          57.1               13.2 +/-    0.35      15.4 +/-    0.35  0.320 / 0.190
G08     42.0           20.3               10.4 +/-    2.21      22.6 +/-    2.21  0.020 / 0.040
G09     174.4          11.8               14.8 +/-    7.23      39.7 +/-    7.23  0.030 / 0.040
G11     87.0           43.0               12.4 +/-    1.30      17.2 +/-    1.30  0.040 / 0.020
G13     308.0          29.8               12.9 +/-    1.42      22.7 +/-    1.42  0.030 / 0.020
G17     207.5          37.3               14.1 +/-    1.52      21.5 +/-    1.52  0.080 / 0.160
G18     78.4           24.6               11.6 +/-    1.69      22.9 +/-    1.69  0.080 / 0.150
G28     322.4          61.3               11.9 +/-    0.78      13.4 +/-    0.78  0.070 / 0.150
G30     37.1           79.0               13.8 +/-    1.06      14.1 +/-    1.06  0.070 / 0.130