PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-04:27:50
G10     244.3          21.0                6.8 +/-    3.25      14.6 +/-    3.25  0.040 / 0.050
G13     61.6           33.8                5.6 +/-    1.49       9.1 +/-    1.49  0.060 / 0.040
G15     102.6          57.4                5.8 +/-    0.49       6.7 +/-    0.49  0.090 / 0.310
G16     302.6          15.4                3.4 +/-    2.13       8.4 +/-    2.13  0.090 / 0.360
G20     277.2          63.6                7.0 +/-    0.87       7.7 +/-    0.87  0.060 / 0.110
G21     324.4          54.5                6.8 +/-    0.48       8.1 +/-    0.48  0.070 / 0.110
G26     274.0          18.4                7.2 +/-    2.71      16.5 +/-    2.71  0.070 / 0.050
G29     162.7          59.4                6.4 +/-    0.36       7.3 +/-    0.36  0.060 / 0.040