PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-16:42:40
G10     301.9          52.9                5.8 +/-    0.96       7.0 +/-    0.96  0.060 / 0.070
G14     211.3          15.2                7.9 +/-    3.27      19.6 +/-    3.27  0.050 / 0.070
G15     45.5           23.7                4.7 +/-    0.86       9.4 +/-    0.86  0.030 / 0.050
G18     10.9           64.7                5.1 +/-    0.55       5.6 +/-    0.55  0.040 / 0.050
G20     73.0           18.2                5.3 +/-    0.87      12.2 +/-    0.87  0.070 / 0.170
G21     112.2          66.5                7.6 +/-    0.75       8.2 +/-    0.75  0.070 / 0.210
G24     94.9           27.9                7.4 +/-    0.99      13.6 +/-    0.99  0.070 / 0.130
G27     295.0          36.3                5.8 +/-    1.30       8.9 +/-    1.30  0.060 / 0.110
G32     212.6          34.8                7.9 +/-    1.13      12.5 +/-    1.13  0.070 / 0.080