PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-18:13:00
G01     321.0          10.5              -15.4 +/-   25.62     -42.4 +/-   25.62  0.040 / 0.030
G08     266.0          17.1                9.3 +/-    1.20      22.0 +/-    1.20  0.040 / 0.030
G10     64.2           58.0                8.7 +/-    1.00      10.0 +/-    1.00  0.160 / 0.270
G11     310.9          17.6                7.2 +/-    1.87      16.8 +/-    1.87  0.140 / 0.570
G14     271.8          67.1                8.4 +/-    0.62       9.0 +/-    0.62  0.070 / 0.070
G18     94.9           33.2                8.5 +/-    1.00      13.9 +/-    1.00  0.050 / 0.080
G27     229.2          14.1               10.4 +/-    2.32      26.5 +/-    2.32  0.030 / 0.020
G31     178.8          31.6               10.1 +/-    1.16      17.0 +/-    1.16  0.030 / 0.020
G32     343.9          73.2                8.2 +/-    0.35       8.5 +/-    0.35  0.030 / 0.040