PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-19:43:10
G02     55.0           37.4                9.0 +/-    0.55      13.6 +/-    0.55  0.030 / 0.030
G05     65.0           64.7                8.2 +/-    0.58       9.0 +/-    0.58  0.040 / 0.040
G12     182.0          33.1               11.9 +/-    1.57      19.6 +/-    1.57  0.120 / 0.260
G13     130.7          12.7               12.2 +/-    2.20      32.1 +/-    2.20  0.150 / 0.290
G21     267.9          14.0                9.5 +/-    1.56      24.1 +/-    1.56  0.040 / 0.090
G25     241.0          54.3                9.9 +/-    1.50      11.9 +/-    1.50  0.050 / 0.110
G29     324.9          49.6               10.0 +/-    1.21      12.6 +/-    1.21  0.040 / 0.060