PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-01:28:00
G07     352.5          64.3                5.9 +/-    0.77       6.4 +/-    0.77  0.080 / 0.070
G08     76.6           51.0                6.3 +/-    0.42       7.8 +/-    0.42  0.060 / 0.060
G09     175.2          56.2                7.5 +/-    0.58       8.8 +/-    0.58  0.040 / 0.050
G11     141.7          20.9                7.6 +/-    1.62      16.5 +/-    1.62  0.040 / 0.040
G23     159.0          30.4                6.1 +/-    1.35      10.5 +/-    1.35  0.110 / 0.150
G27     45.8           24.4                3.7 +/-    2.13       7.3 +/-    2.13  0.080 / 0.120
G28     243.8          30.1                6.3 +/-    1.82      11.0 +/-    1.82  0.070 / 0.180
G30     308.6          39.8                5.1 +/-    1.09       7.5 +/-    1.09  0.080 / 0.180