PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-21:27:40
G03     240.1          68.3               11.3 +/-    1.07      12.1 +/-    1.07  0.050 / 0.040
G09     305.6          23.9                9.2 +/-    0.83      18.5 +/-    0.83  0.060 / 0.040
G14     98.4           17.3               12.3 +/-    2.49      29.0 +/-    2.49  0.160 / 0.250
G16     121.3          58.8               13.7 +/-    0.44      15.7 +/-    0.44  0.120 / 0.250
G22     196.9          54.9               11.9 +/-    0.28      14.2 +/-    0.28  0.050 / 0.070
G23     319.4          49.2               11.1 +/-    0.56      14.2 +/-    0.56  0.050 / 0.070
G26     68.7           51.3                9.5 +/-    1.35      11.8 +/-    1.35  0.030 / 0.030
G31     52.6           19.4                8.7 +/-    2.93      19.5 +/-    2.93  0.030 / 0.040