PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-07:58:10
G10     259.4          33.1                4.9 +/-    1.91       8.0 +/-    1.91  0.110 / 0.270
G13     46.2           24.2                4.8 +/-    2.08       9.6 +/-    2.08  0.120 / 0.360
G15     67.7           52.9                5.1 +/-    0.62       6.2 +/-    0.62  0.050 / 0.050
G16     286.1          14.0                3.2 +/-    1.29       8.2 +/-    1.29  0.050 / 0.040
G20     26.7           61.3                4.2 +/-    0.88       4.8 +/-    0.88  0.040 / 0.040
G21     348.7          67.3                4.4 +/-    0.97       4.7 +/-    0.97  0.040 / 0.040
G24     126.5          9.8               -16.2 +/-    9.36     -45.3 +/-    9.36  0.120 / 0.260
G26     258.1          11.3                5.7 +/-    2.18      15.4 +/-    2.18  0.090 / 0.250
G27     321.1          13.6                1.5 +/-    2.34       3.7 +/-    2.34  0.080 / 0.120
G29     166.9          38.9                5.2 +/-    0.65       7.7 +/-    0.65  0.100 / 0.140