PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-19:27:50
G02     238.0          73.6               11.4 +/-    0.38      11.9 +/-    0.38  0.130 / 0.180
G05     172.0          15.4               15.3 +/-    2.28      37.5 +/-    2.28  0.190 / 0.250
G06     41.1           57.6               10.4 +/-    0.52      12.0 +/-    0.52  0.120 / 0.100
G12     322.4          54.2                8.7 +/-    0.62      10.4 +/-    0.62  0.130 / 0.110
G17     70.1           23.1                9.5 +/-    1.38      19.4 +/-    1.38  0.050 / 0.030
G19     53.9           41.5                9.1 +/-    1.12      12.9 +/-    1.12  0.040 / 0.040
G24     244.8          35.2               13.6 +/-    1.97      21.6 +/-    1.97  0.360 / 0.460
G25     316.5          11.7               -0.9 +/-   30.49      -2.4 +/-   30.49  0.270 / 0.280