PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-07:27:40
G01     227.1          18.0                4.5 +/-    3.06      10.5 +/-    3.06  0.030 / 0.030
G03     293.9          64.5                5.1 +/-    0.81       5.6 +/-    0.81  0.030 / 0.030
G14     86.3           23.5                2.5 +/-    2.54       5.0 +/-    2.54  0.190 / 0.190
G16     150.0          43.2                6.2 +/-    0.77       8.6 +/-    0.77  0.110 / 0.210
G22     218.4          72.0                5.2 +/-    0.38       5.4 +/-    0.38  0.120 / 0.210
G23     305.4          34.9                4.4 +/-    1.22       7.0 +/-    1.22  0.070 / 0.090
G26     103.5          54.3                4.8 +/-    0.36       5.7 +/-    0.36  0.120 / 0.180
G31     44.2           34.2                1.8 +/-    1.71       3.0 +/-    1.71  0.110 / 0.180