PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-00:27:50
G07     345.5          62.0                5.6 +/-    0.56       6.2 +/-    0.56  0.110 / 0.080
G08     86.8           53.1                5.7 +/-    0.56       6.9 +/-    0.56  0.150 / 0.100
G09     186.0          66.0                6.8 +/-    0.68       7.4 +/-    0.68  0.030 / 0.030
G11     142.1          17.4                6.4 +/-    2.59      15.0 +/-    2.59  0.030 / 0.040
G23     157.6          33.1                7.0 +/-    1.32      11.5 +/-    1.32  0.040 / 0.030
G27     47.8           26.4                4.4 +/-    1.52       8.3 +/-    1.52  0.030 / 0.030
G28     244.5          36.3                7.1 +/-    2.33      11.0 +/-    2.33  0.170 / 0.140
G30     310.7          43.3                5.2 +/-    0.70       7.2 +/-    0.70  0.180 / 0.150