PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-17:58:20
G08     300.4          21.8                7.9 +/-    2.30      16.7 +/-    2.30  0.060 / 0.090
G10     350.9          62.2                7.5 +/-    0.43       8.4 +/-    0.43  0.050 / 0.100
G14     224.6          40.3               12.9 +/-    2.30      18.7 +/-    2.30  0.050 / 0.090
G18     56.4           53.4                8.6 +/-    0.88      10.4 +/-    0.88  0.060 / 0.070
G21     141.5          41.3               12.9 +/-    1.32      18.4 +/-    1.32  0.030 / 0.030
G24     63.9           28.9                8.3 +/-    0.58      14.8 +/-    0.58  0.030 / 0.040
G27     260.6          34.6               11.3 +/-    1.09      18.0 +/-    1.09  0.050 / 0.120
G32     234.5          60.9               13.3 +/-    0.73      15.0 +/-    0.73  0.080 / 0.110