PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-15:28:10
G10     250.9          26.3               10.1 +/-    1.28      19.2 +/-    1.28  0.040 / 0.040
G13     54.0           30.7                7.9 +/-    0.47      13.7 +/-    0.47  0.050 / 0.060
G15     83.2           56.4                9.7 +/-    0.22      11.4 +/-    0.22  0.040 / 0.050
G16     299.5          13.8                5.3 +/-    1.98      13.6 +/-    1.98  0.050 / 0.050
G18     271.9          58.0                9.7 +/-    0.75      11.2 +/-    0.75  0.200 / 0.350
G20     40.9           50.8                6.4 +/-    0.43       8.0 +/-    0.43  0.160 / 0.290
G21     343.3          64.3                7.8 +/-    0.56       8.5 +/-    0.56  0.060 / 0.130
G26     269.9          15.2                8.6 +/-    1.75      21.3 +/-    1.75  0.060 / 0.140
G29     162.8          45.0                9.9 +/-    1.55      13.4 +/-    1.55  0.110 / 0.330