PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-16:27:40
G07     318.3          53.4                9.9 +/-    1.30      12.0 +/-    1.30  0.190 / 0.360
G08     122.6          43.4               11.3 +/-    0.84      15.6 +/-    0.84  0.110 / 0.380
G09     291.1          80.6               10.9 +/-    1.13      11.1 +/-    1.13  0.040 / 0.050
G16     42.5           23.9                7.7 +/-    0.93      15.5 +/-    0.93  0.040 / 0.060
G23     147.2          59.6               11.3 +/-    0.90      12.9 +/-    0.90  0.140 / 0.190
G27     76.4           37.7                9.9 +/-    0.61      14.9 +/-    0.61  0.130 / 0.150
G28     225.5          11.6                8.0 +/-   18.94      21.6 +/-   18.94  0.060 / 0.070
G30     289.6          25.9               12.6 +/-    1.52      24.2 +/-    1.52  0.060 / 0.080