PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-14:42:40
G03     184.9          11.0                8.2 +/-    1.49      22.5 +/-    1.49  0.030 / 0.060
G07     305.0          47.8                9.7 +/-    1.32      12.6 +/-    1.32  0.030 / 0.070
G08     134.3          35.3               12.3 +/-    0.98      19.4 +/-    0.98  0.030 / 0.040
G09     316.2          70.7                9.8 +/-    0.71      10.4 +/-    0.71  0.030 / 0.030
G16     42.0           32.6                6.0 +/-    1.42      10.0 +/-    1.42  0.050 / 0.090
G23     136.4          69.8               10.7 +/-    1.29      11.3 +/-    1.29  0.060 / 0.100
G27     90.2           36.7                8.8 +/-    1.03      13.5 +/-    1.03  0.040 / 0.050
G30     281.7          20.2                6.6 +/-    1.76      14.5 +/-    1.76  0.030 / 0.050