PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/28-17:27:30
G10     246.9          23.9                9.9 +/-    2.30      19.9 +/-    2.30  0.190 / 0.430
G13     57.7           31.8                8.0 +/-    1.73      13.6 +/-    1.73  0.130 / 0.380
G15     101.7          59.0                9.8 +/-    0.42      11.3 +/-    0.42  0.040 / 0.060
G16     300.3          15.4                7.2 +/-    1.43      17.6 +/-    1.43  0.040 / 0.050
G20     264.1          47.9               10.9 +/-    3.60      14.1 +/-    3.60  0.050 / 0.110
G21     330.3          58.0                9.0 +/-    0.40      10.4 +/-    0.40  0.050 / 0.140
G26     273.1          17.0                8.9 +/-    3.04      21.1 +/-    3.04  0.030 / 0.040
G29     162.8          54.8               10.7 +/-    0.51      12.8 +/-    0.51  0.030 / 0.040