PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/09-18:27:50
G02     83.2           13.7               11.7 +/-    1.42      30.1 +/-    1.42  0.120 / 0.470
G05     44.6           36.6               10.5 +/-    0.47      16.2 +/-    0.47  0.130 / 0.490
G13     101.9          33.2               13.5 +/-    0.73      22.2 +/-    0.73  0.140 / 0.190
G15     145.1          37.2               14.7 +/-    0.71      22.4 +/-    0.71  0.150 / 0.190
G18     230.8          27.1               11.5 +/-    1.63      21.5 +/-    1.63  0.080 / 0.180
G20     335.5          84.6               10.9 +/-    0.62      11.0 +/-    0.62  0.120 / 0.200
G21     297.0          36.9               11.2 +/-    0.81      17.2 +/-    0.81  0.040 / 0.040
G25     207.6          25.4               13.7 +/-    0.82      26.5 +/-    0.82  0.040 / 0.040
G26     310.2          15.5               10.1 +/-    2.99      24.7 +/-    2.99  0.040 / 0.080
G29     81.0           85.3               11.0 +/-    1.25      11.0 +/-    1.25  0.040 / 0.080