PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-17:12:40
G07     320.3          54.1                9.5 +/-    0.49      11.4 +/-    0.49  0.050 / 0.050
G08     119.9          44.7               12.5 +/-    0.82      17.0 +/-    0.82  0.060 / 0.050
G09     279.5          81.9                8.9 +/-    0.41       9.0 +/-    0.41  0.060 / 0.070
G16     42.7           22.8                7.8 +/-    2.16      16.0 +/-    2.16  0.060 / 0.050
G23     148.6          57.9               13.7 +/-    0.67      15.9 +/-    0.67  0.030 / 0.020
G27     74.1           37.6               10.4 +/-    0.95      15.7 +/-    0.95  0.040 / 0.020
G28     226.5          13.3               11.7 +/-    3.32      30.2 +/-    3.32  0.050 / 0.050
G30     290.9          26.8                9.1 +/-    1.78      17.0 +/-    1.78  0.050 / 0.050