PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-15:12:40
G10     245.1          21.2                8.6 +/-    3.36      18.4 +/-    3.36  0.130 / 0.200
G13     61.3           34.2                8.5 +/-    1.81      13.7 +/-    1.81  0.150 / 0.200
G15     97.7           57.0               10.3 +/-    0.71      12.1 +/-    0.71  0.050 / 0.040
G16     306.4          13.3                4.3 +/-    2.53      11.3 +/-    2.53  0.060 / 0.040
G18     261.2          53.4                9.5 +/-    2.67      11.5 +/-    2.67  0.100 / 0.320
G20     35.4           57.1                8.4 +/-    0.43       9.9 +/-    0.43  0.110 / 0.370
G26     276.9          17.5                7.3 +/-    2.58      17.2 +/-    2.58  0.060 / 0.090
G29     160.4          53.1               10.2 +/-    0.33      12.4 +/-    0.33  0.060 / 0.100