PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-18:12:50
G02     83.7           13.2               15.9 +/-    1.58      41.1 +/-    1.58  0.140 / 0.460
G05     44.6           35.8               13.7 +/-    0.71      21.4 +/-    0.71  0.130 / 0.500
G13     101.2          33.5               17.2 +/-    1.74      28.1 +/-    1.74  0.040 / 0.090
G15     144.5          37.8               18.6 +/-    0.69      28.1 +/-    0.69  0.040 / 0.080
G18     231.2          27.7               16.5 +/-    1.19      30.3 +/-    1.19  0.100 / 0.190
G20     339.7          84.3               14.1 +/-    0.38      14.2 +/-    0.38  0.120 / 0.250
G21     297.6          37.4               15.2 +/-    0.73      23.1 +/-    0.73  0.070 / 0.120
G25     207.4          24.9               18.2 +/-    0.86      35.6 +/-    0.86  0.060 / 0.100
G26     309.9          15.6               11.3 +/-    3.20      27.8 +/-    3.20  0.040 / 0.030
G29     91.1           84.9               14.1 +/-    0.94      14.2 +/-    0.94  0.050 / 0.040