PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-20:58:00
G02     199.9          20.1               14.5 +/-    2.94      31.8 +/-    2.94  0.110 / 0.250
G06     173.1          51.0               14.6 +/-    0.74      18.2 +/-    0.74  0.100 / 0.190
G13     226.9          13.9               16.0 +/-    2.62      40.9 +/-    2.62  0.080 / 0.120
G17     21.1           60.4               13.8 +/-    1.04      15.6 +/-    1.04  0.080 / 0.120
G19     320.9          71.4               12.6 +/-    0.43      13.2 +/-    0.43  0.070 / 0.070
G24     309.9          29.6               11.7 +/-    0.90      20.8 +/-    0.90  0.040 / 0.070
G28     83.3           44.0               12.1 +/-    1.67      16.6 +/-    1.67  0.180 / 0.400
G30     156.3          13.5               15.0 +/-    1.09      38.7 +/-    1.09  0.170 / 0.870