PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-21:57:50
G03     227.1          65.4                8.8 +/-    1.24       9.6 +/-    1.24  0.080 / 0.370
G07     251.4          12.3                9.1 +/-    2.90      24.0 +/-    2.90  0.110 / 0.400
G09     306.5          23.2                7.6 +/-    2.21      15.5 +/-    2.21  0.040 / 0.040
G14     103.4          10.7               10.5 +/-    2.37      28.8 +/-    2.37  0.040 / 0.050
G16     120.4          61.5               13.9 +/-    0.89      15.6 +/-    0.89  0.050 / 0.040
G22     192.9          50.6               10.5 +/-    0.93      13.1 +/-    0.93  0.050 / 0.040
G23     321.1          50.9                9.7 +/-    1.33      12.1 +/-    1.33  0.110 / 0.520
G26     65.7           51.5                9.5 +/-    0.44      11.8 +/-    0.44  0.110 / 0.560
G31     53.4           20.1                6.7 +/-    2.87      14.7 +/-    2.87  0.040 / 0.070