PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-16:58:10
G10     249.4          24.9               11.8 +/-    1.75      23.0 +/-    1.75  0.040 / 0.060
G13     55.9           31.8                9.1 +/-    1.09      15.4 +/-    1.09  0.040 / 0.040
G15     87.3           56.9               10.7 +/-    0.84      12.5 +/-    0.84  0.120 / 0.330
G16     302.5          13.3                8.5 +/-    1.49      22.0 +/-    1.49  0.160 / 0.340
G18     268.5          56.5               11.7 +/-    0.66      13.7 +/-    0.66  0.040 / 0.060
G20     40.3           51.5                8.2 +/-    0.58      10.2 +/-    0.58  0.040 / 0.050
G21     338.1          62.2                9.7 +/-    0.41      10.9 +/-    0.41  0.130 / 0.410
G26     272.8          15.8               10.9 +/-    2.06      26.6 +/-    2.06  0.110 / 0.330
G29     161.7          45.9               11.9 +/-    0.56      15.9 +/-    0.56  0.050 / 0.140