PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/15-16:27:50
G05     47.2           22.3                8.7 +/-    3.01      18.2 +/-    3.01  0.190 / 0.300
G13     83.8           37.1               12.1 +/-    1.02      18.4 +/-    1.02  0.220 / 0.190
G15     129.4          49.0               13.0 +/-    0.83      16.6 +/-    0.83  0.030 / 0.040
G18     241.5          39.6               11.5 +/-    1.33      16.8 +/-    1.33  0.030 / 0.030
G20     19.2           72.7                9.5 +/-    0.51       9.9 +/-    0.51  0.080 / 0.170
G25     201.2          14.1               14.1 +/-    1.84      36.0 +/-    1.84  0.080 / 0.170
G26     296.2          19.1                6.4 +/-    0.62      14.5 +/-    0.62  0.220 / 0.310
G29     147.2          71.6               12.2 +/-    0.39      12.7 +/-    0.39  0.290 / 0.320