PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-16:27:50
G10     275.7          42.4                9.4 +/-    1.32      13.1 +/-    1.32  0.070 / 0.120
G13     39.3           13.1                6.0 +/-    1.06      15.7 +/-    1.06  0.080 / 0.130
G15     51.7           41.0                9.6 +/-    0.96      13.7 +/-    0.96  0.030 / 0.040
G18     323.9          67.0                8.1 +/-    0.88       8.7 +/-    0.88  0.040 / 0.040
G20     58.9           31.3                8.4 +/-    0.91      14.3 +/-    0.91  0.110 / 0.250
G21     51.0           75.3                9.8 +/-    0.37      10.1 +/-    0.37  0.120 / 0.200
G24     114.7          18.6               15.4 +/-    1.05      35.0 +/-    1.05  0.060 / 0.130
G27     313.4          25.9                9.5 +/-    0.97      18.1 +/-    0.97  0.080 / 0.160
G29     166.7          19.1               14.2 +/-    1.30      32.0 +/-    1.30  0.240 / 0.220
G32     206.1          15.6               13.9 +/-    1.83      34.0 +/-    1.83  0.110 / 0.170