PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-10:12:30
G02     256.1          80.0                1.9 +/-    0.53       1.9 +/-    0.53  0.120 / 0.120
G05     171.0          18.6                4.4 +/-    2.14      10.0 +/-    2.14  0.090 / 0.130
G06     38.9           60.8                2.3 +/-    0.70       2.6 +/-    0.70  0.030 / 0.030
G12     321.1          53.6                0.7 +/-    0.48       0.8 +/-    0.48  0.030 / 0.030
G17     74.5           19.5                2.2 +/-    1.05       5.0 +/-    1.05  0.100 / 0.100
G19     61.6           35.5                2.3 +/-    0.73       3.6 +/-    0.73  0.090 / 0.110
G24     243.4          33.2                6.4 +/-    1.86      10.5 +/-    1.86  0.130 / 0.410
G25     317.3          15.5                2.1 +/-    2.81       5.2 +/-    2.81  0.310 / 0.190