PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/06-03:57:50
G07     359.4          65.3                4.2 +/-    0.61       4.6 +/-    0.61  0.040 / 0.110
G08     73.8           51.0                5.8 +/-    0.96       7.3 +/-    0.96  0.050 / 0.080
G09     181.9          58.5                7.4 +/-    0.73       8.6 +/-    0.73  0.040 / 0.040
G11     136.2          21.8                5.5 +/-    1.41      11.5 +/-    1.41  0.030 / 0.040
G23     159.4          28.0                7.6 +/-    1.52      13.9 +/-    1.52  0.040 / 0.040
G27     43.8           21.9                4.8 +/-    1.74      10.0 +/-    1.74  0.050 / 0.040
G28     250.9          41.0                5.5 +/-    2.11       7.9 +/-    2.11  0.030 / 0.030
G30     314.6          45.9                4.0 +/-    0.63       5.3 +/-    0.63  0.030 / 0.030