PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-14:58:10
G10     244.5          20.6                6.0 +/-    4.09      12.9 +/-    4.09  0.040 / 0.040
G13     62.1           34.5                7.3 +/-    0.97      11.7 +/-    0.97  0.040 / 0.040
G15     99.2           56.9                7.9 +/-    0.45       9.2 +/-    0.45  0.170 / 0.150
G16     306.9          13.2                5.8 +/-    2.34      15.0 +/-    2.34  0.120 / 0.170
G18     260.2          53.0                8.2 +/-    2.24      10.0 +/-    2.24  0.130 / 0.340
G20     34.6           57.9                5.3 +/-    0.71       6.1 +/-    0.71  0.110 / 0.320
G21     332.2          59.3                4.3 +/-    0.68       5.0 +/-    0.68  0.040 / 0.040
G26     277.5          17.8                6.6 +/-    0.91      15.5 +/-    0.91  0.050 / 0.040
G29     160.1          54.1                7.2 +/-    0.50       8.7 +/-    0.50  0.080 / 0.090