PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-09:57:40
G07     4.0            65.7                2.6 +/-    0.43       2.9 +/-    0.43  0.050 / 0.080
G08     71.8           49.9                2.2 +/-    0.51       2.8 +/-    0.51  0.060 / 0.080
G09     178.2          55.7                3.0 +/-    2.06       3.6 +/-    2.06  0.040 / 0.040
G11     133.9          22.1                2.9 +/-    0.93       6.2 +/-    0.93  0.040 / 0.030
G23     159.6          28.7                2.6 +/-    1.79       4.7 +/-    1.79  0.050 / 0.040
G27     43.7           21.7                1.7 +/-    1.42       3.5 +/-    1.42  0.060 / 0.050
G28     250.9          40.7                3.5 +/-    1.31       5.0 +/-    1.31  0.060 / 0.140
G30     312.6          43.6                0.7 +/-    1.06       0.9 +/-    1.06  0.060 / 0.150