PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-17:43:00
G02     54.9           37.8                7.2 +/-    1.55      10.9 +/-    1.55  0.090 / 0.340
G05     66.1           66.2                8.4 +/-    0.46       9.0 +/-    0.46  0.180 / 0.420
G12     182.9          33.4               10.6 +/-    0.98      17.4 +/-    0.98  0.090 / 0.120
G13     130.0          13.3               11.7 +/-    2.48      30.3 +/-    2.48  0.090 / 0.090
G21     269.1          15.5                7.7 +/-    1.97      18.8 +/-    1.97  0.030 / 0.030
G25     237.2          53.5                9.7 +/-    3.69      11.7 +/-    3.69  0.030 / 0.020
G29     326.1          51.1                8.3 +/-    0.96      10.3 +/-    0.96  0.080 / 0.060