PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-09:12:50
G01     111.0          23.3                5.3 +/-    2.07      10.8 +/-    2.07  0.030 / 0.030
G07     101.0          60.3                6.3 +/-    0.44       7.1 +/-    0.44  0.040 / 0.030
G08     42.0           21.8                4.0 +/-    2.85       8.5 +/-    2.85  0.030 / 0.030
G09     172.2          12.8                4.5 +/-    1.25      11.9 +/-    1.25  0.030 / 0.030
G11     92.7           42.3                5.3 +/-    0.91       7.4 +/-    0.91  0.090 / 0.140
G13     312.3          26.4                4.0 +/-    1.74       7.6 +/-    1.74  0.090 / 0.150
G17     203.6          35.5                5.5 +/-    1.45       8.6 +/-    1.45  0.080 / 0.210
G18     83.0           23.3                5.2 +/-    1.76      10.6 +/-    1.76  0.090 / 0.140
G28     307.9          59.7                4.6 +/-    1.09       5.3 +/-    1.09  0.100 / 0.130
G30     1.7            74.9                5.5 +/-    1.14       5.6 +/-    1.14  0.100 / 0.130