PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-20:57:30
G01     227.8          21.1               11.4 +/-    2.27      24.5 +/-    2.27  0.040 / 0.030
G03     302.0          62.5                8.3 +/-    0.85       9.2 +/-    0.85  0.040 / 0.030
G14     78.3           31.5                9.0 +/-    0.97      15.3 +/-    0.97  0.080 / 0.130
G16     149.0          39.2               12.3 +/-    0.62      18.1 +/-    0.62  0.080 / 0.140
G22     239.7          74.0               10.2 +/-    0.35      10.6 +/-    0.35  0.060 / 0.080
G23     302.5          32.7               -8.4 +/-    2.63     -13.9 +/-    2.63  0.050 / 0.090
G26     109.2          52.4               10.3 +/-    0.34      12.7 +/-    0.34  0.040 / 0.040
G31     43.4           38.1                7.3 +/-    0.86      10.9 +/-    0.86  0.040 / 0.040