PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-17:57:40
G08     287.7          22.7                5.9 +/-    0.80      12.2 +/-    0.80  0.110 / 0.110
G10     18.7           63.2                9.2 +/-    0.60      10.2 +/-    0.60  0.090 / 0.100
G14     235.8          51.4                8.9 +/-    1.78      11.0 +/-    1.78  0.150 / 0.280
G18     72.3           46.5                7.4 +/-    1.13       9.8 +/-    1.13  0.100 / 0.150
G21     147.8          29.5                8.5 +/-    2.38      15.1 +/-    2.38  0.070 / 0.190
G24     52.0           23.7                6.5 +/-    3.02      13.2 +/-    3.02  0.080 / 0.070
G27     247.1          28.2                7.3 +/-    1.72      13.3 +/-    1.72  0.080 / 0.080
G31     183.5          10.3               -6.6 +/-    6.33     -18.2 +/-    6.33  0.030 / 0.020
G32     259.2          71.3                8.1 +/-    0.81       8.5 +/-    0.81  0.020 / 0.020