PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-15:27:50
G10     280.9          44.9                9.1 +/-    0.93      12.3 +/-    0.93  0.080 / 0.040
G13     38.2           9.5                 5.1 +/-    1.31      14.2 +/-    1.31  0.050 / 0.060
G15     49.3           37.2                6.1 +/-    1.11       9.2 +/-    1.11  0.110 / 0.190
G18     335.5          67.3                7.5 +/-    0.27       8.1 +/-    0.27  0.090 / 0.170
G20     61.6           28.9                6.9 +/-    1.27      12.4 +/-    1.27  0.080 / 0.120
G21     65.6           75.3                7.9 +/-    1.27       8.1 +/-    1.27  0.070 / 0.100
G24     110.6          21.0                8.6 +/-    1.71      18.5 +/-    1.71  0.080 / 0.080
G27     310.4          28.7                6.7 +/-    1.21      12.0 +/-    1.21  0.090 / 0.090
G29     167.1          15.6                8.8 +/-    1.37      21.6 +/-    1.37  0.070 / 0.390
G32     207.0          20.1                8.7 +/-    1.38      19.1 +/-    1.38  0.070 / 0.270