PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-16:42:30
G07     319.8          54.0               12.8 +/-    0.80      15.4 +/-    0.80  0.050 / 0.050
G08     120.9          44.3               14.6 +/-    0.73      19.9 +/-    0.73  0.050 / 0.050
G09     283.9          81.5               11.5 +/-    0.54      11.6 +/-    0.54  0.050 / 0.050
G16     42.6           23.0               10.2 +/-    2.69      20.8 +/-    2.69  0.040 / 0.050
G23     148.1          58.3               14.9 +/-    0.71      17.2 +/-    0.71  0.060 / 0.060
G27     74.8           37.6               13.3 +/-    1.15      20.1 +/-    1.15  0.050 / 0.060
G28     226.2          12.7               10.9 +/-    8.74      28.7 +/-    8.74  0.030 / 0.020
G30     290.5          26.6               13.5 +/-    2.10      25.4 +/-    2.10  0.040 / 0.020