PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-16:27:00
G02     44.7           45.5               10.9 +/-    0.45      14.6 +/-    0.45  0.040 / 0.060
G05     115.9          70.0               13.0 +/-    0.69      13.7 +/-    0.69  0.050 / 0.070
G12     191.2          53.8               15.6 +/-    1.94      18.8 +/-    1.94  0.030 / 0.030
G20     200.9          39.4               16.9 +/-    0.90      24.9 +/-    0.90  0.030 / 0.040
G25     268.9          59.3               13.9 +/-    0.93      15.8 +/-    0.93  0.050 / 0.110