PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/13-18:58:00
G02     50.6           40.4              -13.3 +/-    1.09     -19.2 +/-    1.09  0.110 / 0.380
G05     77.2           68.0               10.0 +/-    0.84      10.7 +/-    0.84  0.050 / 0.060
G12     186.4          43.3               10.4 +/-    0.70      14.4 +/-    0.70  0.060 / 0.080
G21     264.2          10.8               -5.2 +/-   13.53     -14.4 +/-   13.53  0.060 / 0.040
G25     254.2          56.9                8.4 +/-    1.26       9.8 +/-    1.26  0.040 / 0.050
G29     322.7          46.2                9.9 +/-    0.69      13.1 +/-    0.69  0.040 / 0.080