PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-22:12:50
G03     228.7          65.9                9.4 +/-    0.95      10.2 +/-    0.95  0.120 / 0.240
G07     250.9          11.8                4.0 +/-   17.28      10.7 +/-   17.28  0.180 / 0.280
G09     306.2          22.9                8.9 +/-    1.23      18.2 +/-    1.23  0.130 / 0.360
G14     102.9          11.2                7.2 +/-    1.91      19.5 +/-    1.91  0.140 / 0.370
G16     121.3          61.2               10.4 +/-    0.26      11.7 +/-    0.26  0.040 / 0.030
G22     193.4          51.3               10.2 +/-    0.92      12.7 +/-    0.92  0.040 / 0.050
G23     320.6          50.4                8.5 +/-    0.72      10.7 +/-    0.72  0.040 / 0.040
G26     66.4           51.7                6.9 +/-    0.96       8.6 +/-    0.96  0.050 / 0.040
G31     53.1           20.3                5.0 +/-    3.13      11.0 +/-    3.13  0.050 / 0.060