PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-00:13:10
G10     244.2          21.1               13.0 +/-    1.73      27.9 +/-    1.73  0.050 / 0.060
G13     61.5           33.6               10.2 +/-    1.59      16.6 +/-    1.59  0.040 / 0.040
G15     107.4          58.0               12.1 +/-    0.32      14.0 +/-    0.32  0.110 / 0.330
G16     302.1          15.8                8.0 +/-    1.81      19.4 +/-    1.81  0.110 / 0.400
G20     253.0          29.9               15.2 +/-    2.91      26.6 +/-    2.91  0.050 / 0.100
G21     323.7          54.0               10.8 +/-    0.56      13.0 +/-    0.56  0.080 / 0.100
G26     273.9          18.5               11.0 +/-    2.47      25.1 +/-    2.47  0.030 / 0.040
G29     162.7          60.1               11.8 +/-    0.49      13.4 +/-    0.49  0.030 / 0.040