PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-22:12:40
G03     228.7          65.9                9.0 +/-    1.33       9.7 +/-    1.33  0.080 / 0.530
G07     250.9          11.8                8.2 +/-    3.70      22.0 +/-    3.70  0.090 / 0.400
G09     306.2          22.9                6.3 +/-    2.64      12.9 +/-    2.64  0.100 / 0.590
G14     102.9          11.2                6.0 +/-    2.05      16.4 +/-    2.05  0.110 / 0.500
G16     121.3          61.2               11.8 +/-    0.78      13.3 +/-    0.78  0.040 / 0.050
G22     193.4          51.3               10.1 +/-    0.62      12.6 +/-    0.62  0.040 / 0.050
G23     320.6          50.4                7.7 +/-    0.98       9.6 +/-    0.98  0.040 / 0.040
G26     66.4           51.7                7.4 +/-    0.46       9.2 +/-    0.46  0.050 / 0.050
G31     53.1           20.3                3.8 +/-    1.97       8.3 +/-    1.97  0.040 / 0.070