PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-00:13:10
G03     210.8          55.5               10.8 +/-    1.08      12.8 +/-    1.08  0.060 / 0.080
G07     259.3          17.3                9.5 +/-    1.26      22.3 +/-    1.26  0.040 / 0.080
G09     311.6          30.0                5.8 +/-    1.31      10.2 +/-    1.31  0.080 / 0.110
G16     97.3           66.5               10.2 +/-    0.41      11.0 +/-    0.41  0.060 / 0.100
G22     188.1          39.7               10.1 +/-    1.46      14.8 +/-    1.46  0.030 / 0.050
G23     331.8          61.5                6.3 +/-    0.79       7.1 +/-    0.79  0.030 / 0.050
G26     52.5           43.2                6.1 +/-    1.09       8.5 +/-    1.09  0.100 / 0.310
G27     130.9          12.9                7.6 +/-    2.57      19.8 +/-    2.57  0.100 / 0.330
G31     60.3           10.2                2.1 +/-    2.84       5.8 +/-    2.84  0.080 / 0.240