PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-09:57:20
G02     233.2          74.5                2.9 +/-    0.55       3.0 +/-    0.55  0.260 / 0.230
G05     173.6          12.8                3.4 +/-    5.14       8.8 +/-    5.14  0.290 / 0.340
G06     41.5           67.8                2.4 +/-    0.63       2.6 +/-    0.63  0.050 / 0.050
G12     321.1          46.8                0.9 +/-    0.45       1.2 +/-    0.45  0.040 / 0.040
G17     68.9           23.5                1.8 +/-    1.46       3.6 +/-    1.46  0.050 / 0.060
G19     54.8           39.8                2.1 +/-    1.68       3.0 +/-    1.68  0.060 / 0.110
G24     250.8          36.8                5.7 +/-    1.53       8.7 +/-    1.53  0.060 / 0.080