PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-17:12:30
G02     64.9           28.8                8.8 +/-    1.20      15.8 +/-    1.20  0.390 / 0.570
G05     50.5           56.1                8.7 +/-    1.58      10.3 +/-    1.58  0.270 / 0.310
G12     182.0          24.3               10.7 +/-    2.42      21.3 +/-    2.42  0.090 / 0.320
G13     120.2          20.1               11.8 +/-    1.50      26.0 +/-    1.50  0.150 / 0.280
G15     159.8          18.7               12.6 +/-    2.10      28.6 +/-    2.10  0.120 / 0.170
G21     277.8          21.3               10.8 +/-    2.14      23.0 +/-    2.14  0.080 / 0.140
G25     227.7          46.4                9.2 +/-    2.92      12.2 +/-    2.92  0.090 / 0.120
G29     333.7          61.6                7.5 +/-    0.82       8.4 +/-    0.82  0.080 / 0.100