PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-04:42:30
G10     256.2          30.9                8.0 +/-    2.19      13.7 +/-    2.19  0.120 / 0.330
G13     48.5           26.3                5.1 +/-    1.56       9.7 +/-    1.56  0.130 / 0.360
G15     74.6           55.5                6.3 +/-    0.63       7.5 +/-    0.63  0.110 / 0.000
G16     288.6          14.9                5.1 +/-    1.25      12.8 +/-    1.25  0.130 / 0.390
G20     306.9          67.6                6.3 +/-    1.10       6.8 +/-    1.10  0.040 / 0.040
G21     341.4          64.3                4.3 +/-    0.93       4.8 +/-    0.93  0.040 / 0.050
G26     260.7          12.9                7.8 +/-    1.13      20.3 +/-    1.13  0.090 / 0.130
G27     322.1          10.4              -16.1 +/-   15.89     -44.6 +/-   15.89  0.090 / 0.100
G29     166.6          43.5                7.0 +/-    0.96       9.6 +/-    0.96  0.080 / 0.170