PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/08-17:42:40
G07     329.1          57.2               11.4 +/-    0.64      13.3 +/-    0.64  0.050 / 0.040
G08     111.1          48.3               12.2 +/-    0.84      15.8 +/-    0.84  0.040 / 0.050
G09     228.0          81.9               11.0 +/-    0.49      11.1 +/-    0.49  0.100 / 0.250
G16     44.0           17.6                7.4 +/-    2.63      17.4 +/-    2.63  0.210 / 0.380
G23     152.2          51.4               13.1 +/-    0.52      16.2 +/-    0.52  0.030 / 0.020
G27     66.2           36.4               10.6 +/-    0.98      16.5 +/-    0.98  0.030 / 0.030
G28     230.1          18.6               13.7 +/-    1.88      31.2 +/-    1.88  0.070 / 0.060
G30     295.7          30.6               11.8 +/-    1.68      20.4 +/-    1.68  0.080 / 0.060