PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-18:13:00
G02     38.7           50.9               10.0 +/-    0.45      12.5 +/-    0.45  0.020 / 0.030
G05     120.0          68.3               12.2 +/-    0.47      13.0 +/-    0.47  0.020 / 0.040
G12     184.7          53.3               11.9 +/-    1.15      14.4 +/-    1.15  0.030 / 0.050
G25     278.7          58.5               11.2 +/-    0.90      12.9 +/-    0.90  0.050 / 0.060
G29     312.9          33.7                8.5 +/-    0.97      13.9 +/-    0.97  0.040 / 0.060