PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-16:42:20
G02     54.0           37.5                6.8 +/-    1.31      10.3 +/-    1.31  0.190 / 0.370
G05     70.3           67.2                8.3 +/-    0.61       9.0 +/-    0.61  0.150 / 0.320
G12     184.5          38.2                9.1 +/-    0.74      13.6 +/-    0.74  0.240 / 0.390
G13     130.8          11.3               10.6 +/-    3.40      28.7 +/-    3.40  0.250 / 0.530
G21     267.1          13.1                7.1 +/-   11.26      18.4 +/-   11.26  0.050 / 0.060
G25     247.2          55.4                8.7 +/-    1.51      10.4 +/-    1.51  0.040 / 0.050
G29     324.7          48.9                6.6 +/-    0.63       8.4 +/-    0.63  0.050 / 0.080