PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-20:57:30
G01     221.3          14.4               13.9 +/-    4.31      35.1 +/-    4.31  0.040 / 0.040
G03     282.4          68.6               10.8 +/-    0.66      11.5 +/-    0.66  0.040 / 0.040
G09     297.3          14.3                9.3 +/-    1.23      23.7 +/-    1.23  0.130 / 0.190
G14     86.9           25.8               11.1 +/-    2.27      21.3 +/-    2.27  0.110 / 0.180
G16     141.0          47.9               15.3 +/-    1.46      19.8 +/-    1.46  0.070 / 0.090
G22     213.1          68.0               11.6 +/-    0.34      12.4 +/-    0.34  0.080 / 0.090
G23     309.2          39.0               10.7 +/-    1.07      15.7 +/-    1.07  0.030 / 0.030
G26     92.4           54.5               11.5 +/-    1.31      13.8 +/-    1.31  0.030 / 0.030
G31     46.5           30.2                9.1 +/-    1.06      15.9 +/-    1.06  0.040 / 0.070