PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-04:42:40
G10     246.7          23.2               12.1 +/-    1.96      24.8 +/-    1.96  0.100 / 0.360
G13     58.3           32.5                7.0 +/-    1.44      11.7 +/-    1.44  0.120 / 0.270
G15     96.1           57.7                8.1 +/-    0.88       9.4 +/-    0.88  0.040 / 0.040
G16     299.6          15.6                7.3 +/-    2.06      17.9 +/-    2.06  0.040 / 0.050
G20     286.0          66.1                9.5 +/-    0.45      10.3 +/-    0.45  0.050 / 0.130
G21     327.7          56.6                7.8 +/-    0.46       9.1 +/-    0.46  0.070 / 0.110
G26     271.0          17.4               10.4 +/-    2.87      24.4 +/-    2.87  0.060 / 0.040
G29     163.7          55.9                8.3 +/-    0.54       9.8 +/-    0.54  0.050 / 0.040