PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/04-17:57:00
G02     38.7           50.9                7.6 +/-    0.64       9.5 +/-    0.64  0.020 / 0.040
G05     119.8          68.4                9.5 +/-    0.69      10.1 +/-    0.69  0.030 / 0.030
G12     184.4          53.0                8.2 +/-    1.17      10.0 +/-    1.17  0.050 / 0.050
G25     278.3          58.6                8.1 +/-    0.84       9.3 +/-    0.84  0.050 / 0.060
G29     313.0          33.8                8.0 +/-    1.46      13.1 +/-    1.46  0.050 / 0.050