PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-18:57:40
G08     270.9          19.3                7.6 +/-    2.27      17.1 +/-    2.27  0.120 / 0.300
G10     53.5           60.2                6.9 +/-    0.69       7.8 +/-    0.69  0.150 / 0.260
G11     314.1          14.4                7.1 +/-    1.31      17.9 +/-    1.31  0.200 / 0.450
G14     259.9          64.1                8.0 +/-    0.50       8.7 +/-    0.50  0.120 / 0.390
G18     89.4           37.0                8.7 +/-    0.57      13.3 +/-    0.57  0.070 / 0.130
G21     152.3          13.4                9.1 +/-    2.51      23.5 +/-    2.51  0.090 / 0.150
G24     41.7           13.6                4.9 +/-    1.17      12.6 +/-    1.17  0.020 / 0.030
G27     233.3          17.8               10.6 +/-    1.66      24.7 +/-    1.66  0.020 / 0.030
G31     180.2          25.4               10.0 +/-    1.86      19.4 +/-    1.86  0.130 / 0.160
G32     321.7          75.4                7.5 +/-    0.57       7.7 +/-    0.57  0.040 / 0.130