PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/12-17:27:40
G02     244.8          74.9                9.1 +/-    0.41       9.4 +/-    0.41  0.120 / 0.240
G05     171.3          17.7               11.2 +/-    2.02      26.0 +/-    2.02  0.170 / 0.180
G06     40.6           54.0                8.4 +/-    0.46      10.1 +/-    0.46  0.110 / 0.090
G12     322.8          58.9                7.0 +/-    1.12       8.1 +/-    1.12  0.100 / 0.130
G17     73.3           20.0                7.2 +/-    2.13      15.9 +/-    2.13  0.030 / 0.040
G19     56.5           40.2                7.2 +/-    1.18      10.5 +/-    1.18  0.020 / 0.030
G24     241.0          33.4               11.9 +/-    2.10      19.5 +/-    2.10  0.120 / 0.380
G25     317.0          14.8                5.6 +/-    2.08      13.9 +/-    2.08  0.140 / 0.360