PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-20:57:30
G02     199.9          20.1               16.4 +/-    0.87      35.9 +/-    0.87  0.050 / 0.060
G06     173.1          51.0               15.3 +/-    0.82      19.0 +/-    0.82  0.050 / 0.080
G13     226.9          13.9               16.5 +/-    2.58      42.1 +/-    2.58  0.080 / 0.210
G17     21.1           60.4               13.6 +/-    0.71      15.4 +/-    0.71  0.080 / 0.180
G19     320.9          71.4               13.0 +/-    0.61      13.7 +/-    0.61  0.080 / 0.150
G24     309.9          29.6               12.2 +/-    1.51      21.6 +/-    1.51  0.080 / 0.130
G28     83.3           44.0               14.3 +/-    0.46      19.6 +/-    0.46  0.150 / 0.510
G30     156.3          13.5               16.6 +/-    3.19      42.9 +/-    3.19  0.180 / 0.580