PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-21:57:50
G03     246.9          69.5                8.4 +/-    0.42       8.9 +/-    0.42  0.090 / 0.350
G09     302.4          17.9                7.3 +/-    1.41      16.8 +/-    1.41  0.090 / 0.350
G14     97.7           15.5                5.9 +/-    1.26      14.5 +/-    1.26  0.030 / 0.050
G16     133.5          56.2               11.0 +/-    0.77      12.9 +/-    0.77  0.040 / 0.040
G22     198.1          58.4               10.1 +/-    1.22      11.7 +/-    1.22  0.040 / 0.050
G23     315.6          45.0                8.6 +/-    1.05      11.5 +/-    1.05  0.040 / 0.060
G26     77.4           54.6                8.3 +/-    0.64       9.9 +/-    0.64  0.030 / 0.060
G31     49.7           25.5                7.1 +/-    0.83      13.6 +/-    0.83  0.030 / 0.050